Dyes and Pigments最新文献

Multifunctional perovskite quantum dot-polymer composite with excellent shape-memory performance and high stability 具有优异形状记忆性能和高稳定性的多功能钙钛矿量子点-聚合物复合材料

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-04 DOI: 10.1016/j.dyepig.2025.113483

Mengyao Li , Yuchen Zhou , Yi Zhang, Tao Wang, Lanxiang Gao, Luqi Sun, Yuan Li, Xiaomeng Wang, Yanan Wang, Jia Lin

Perovskite quantum dots (PQDs) have attracted significant research attention in recent years as highly promising optoelectronic materials. Nevertheless, their practical application has been limited by inherent structural instability and susceptibility to environmental degradation. Many studies have demonstrated that compositing with polymer materials can enhance the stability of perovskite quantum dots, but challenges remain, such as achieving multifunctionality in the composites. In this study, we propose a functional synergistic optimization strategy that integrates PQDs with shape memory materials. This approach not only enhances the stability of the PQDs but also imparts shape-memory functionality to the resulting composite. Using polylactic acid (PLA) and polycaprolactone (PCL) as the shape memory polymer matrix (PP) to encapsulate inorganic PQDs, we successfully developed a multifunctional flexible fluorescent composite. This simple encapsulation method not only improves the luminescence stability of the PQDs but also confers shape memory properties to the composite. Therefore, through this strategy, a composite material ranging from blue to red can be obtained. Moreover, the composite material exhibits excellent thermal stability. Even after undergoing more than 100 shape memory cycles at 90 °C, the composite material still retains 75.6 % of its initial photoluminescence (PL) intensity. Due to the luminescent and shape memory properties of the composites, it is highly suitable for applications in areas such as anti-counterfeiting and information encryption.

钙钛矿量子点（PQDs）作为一种极具发展前景的光电材料，近年来受到了广泛的关注。然而，它们的实际应用受到固有结构不稳定性和易受环境退化影响的限制。许多研究表明，与聚合物材料复合可以提高钙钛矿量子点的稳定性，但仍然存在挑战，例如在复合材料中实现多功能性。在本研究中，我们提出了一种集成pqd和形状记忆材料的功能协同优化策略。这种方法不仅提高了pqd的稳定性，而且赋予了所得到的复合材料形状记忆功能。以聚乳酸（PLA）和聚己内酯（PCL）作为形状记忆聚合物基体（PP）包封无机PQDs，成功研制了一种多功能柔性荧光复合材料。这种简单的封装方法不仅提高了pqd的发光稳定性，而且赋予了复合材料形状记忆性能。因此，通过这种策略，可以获得从蓝色到红色的复合材料。此外，复合材料还表现出优异的热稳定性。即使在90°C下经历了100多次形状记忆循环后，复合材料仍然保持其初始光致发光（PL）强度的75.6%。由于复合材料的发光和形状记忆性能，它非常适合在防伪和信息加密等领域的应用。

{"title":"Multifunctional perovskite quantum dot-polymer composite with excellent shape-memory performance and high stability","authors":"Mengyao Li , Yuchen Zhou , Yi Zhang, Tao Wang, Lanxiang Gao, Luqi Sun, Yuan Li, Xiaomeng Wang, Yanan Wang, Jia Lin","doi":"10.1016/j.dyepig.2025.113483","DOIUrl":"10.1016/j.dyepig.2025.113483","url":null,"abstract":"<div><div>Perovskite quantum dots (PQDs) have attracted significant research attention in recent years as highly promising optoelectronic materials. Nevertheless, their practical application has been limited by inherent structural instability and susceptibility to environmental degradation. Many studies have demonstrated that compositing with polymer materials can enhance the stability of perovskite quantum dots, but challenges remain, such as achieving multifunctionality in the composites. In this study, we propose a functional synergistic optimization strategy that integrates PQDs with shape memory materials. This approach not only enhances the stability of the PQDs but also imparts shape-memory functionality to the resulting composite. Using polylactic acid (PLA) and polycaprolactone (PCL) as the shape memory polymer matrix (PP) to encapsulate inorganic PQDs, we successfully developed a multifunctional flexible fluorescent composite. This simple encapsulation method not only improves the luminescence stability of the PQDs but also confers shape memory properties to the composite. Therefore, through this strategy, a composite material ranging from blue to red can be obtained. Moreover, the composite material exhibits excellent thermal stability. Even after undergoing more than 100 shape memory cycles at 90 °C, the composite material still retains 75.6 % of its initial photoluminescence (PL) intensity. Due to the luminescent and shape memory properties of the composites, it is highly suitable for applications in areas such as anti-counterfeiting and information encryption.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113483"},"PeriodicalIF":4.2,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An NIR-II anionic heptamethine cyanine probe enables real-time in vivo imaging of tumor-associated glutathione NIR-II阴离子七甲基菁氨酸探针可实现肿瘤相关谷胱甘肽的实时体内成像

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-03 DOI: 10.1016/j.dyepig.2025.113482

Yingying Jing , Jinhan Lu , Jeongyeon Hong , Haohao Zhang , Lei Yu , Yurong Guo , Zhen Kong , Yen Leng Pak , Zhao Wang , Juyoung Yoon

Sensitive and specific in vivo glutathione (GSH) detection is critical for the early diagnosis of cancer, yet current methods are restricted by poor tissue penetration and low specificity. We report T2SHNO2, an NIR-II anionic heptamethine cyanine probe, capable of selective and sensitive imaging of tumor-associated GSH. The probe is incorporated with 4-nitrobenzenethiol (NBT) as a GSH-responsive moiety that quenches fluorescence by photoinduced electron transfer (PET). Reaction with GSH triggers nucleophilic substitution, removing the NBT quencher and restoring NIR-II emission at 924 nm. In addition to being highly selective, T2SHNO2 is also highly stable at physiological pH. It has a low cytotoxicity and excellent biocompatibility, as confirmed by cytotoxicity assays. In vivo imaging of 4T1 tumor-bearing mice reveals strong tumor-specific fluorescence with high signal-to-background contrast. In a density functional theory analysis, the quenching mechanism and restoration of fluorescence are confirmed using PET. These observations render T2SHNO2 a sensitive, biocompatible, and stable probe for deep tissue imaging of tumor-related GSH, and this holds potential as an early cancer diagnostic and real-time therapeutic monitoring agent.

体内谷胱甘肽（GSH）检测的敏感性和特异性对癌症的早期诊断至关重要，但目前的方法受组织穿透性差和特异性低的限制。我们报道了T2SHNO2，一种NIR-II阴离子七甲基菁氨酸探针，能够选择性和敏感地成像肿瘤相关的谷胱甘肽。该探针与4-硝基苯硫醇（NBT）结合，作为gsh响应部分，通过光诱导电子转移（PET）猝灭荧光。与GSH的反应触发亲核取代，去除NBT猝灭剂并恢复NIR-II在924 nm处的发射。除了具有高选择性外，T2SHNO2在生理ph下也高度稳定。细胞毒性实验证实，T2SHNO2具有低细胞毒性和良好的生物相容性。4T1荷瘤小鼠的体内成像显示出强烈的肿瘤特异性荧光，具有高信号-背景对比度。通过密度泛函理论分析，证实了PET的猝灭机理和荧光恢复。这些观察结果表明，T2SHNO2是一种敏感的、生物相容性的、稳定的肿瘤相关谷胱甘肽深层组织成像探针，具有早期癌症诊断和实时治疗监测的潜力。

{"title":"An NIR-II anionic heptamethine cyanine probe enables real-time in vivo imaging of tumor-associated glutathione","authors":"Yingying Jing , Jinhan Lu , Jeongyeon Hong , Haohao Zhang , Lei Yu , Yurong Guo , Zhen Kong , Yen Leng Pak , Zhao Wang , Juyoung Yoon","doi":"10.1016/j.dyepig.2025.113482","DOIUrl":"10.1016/j.dyepig.2025.113482","url":null,"abstract":"<div><div>Sensitive and specific in vivo glutathione (GSH) detection is critical for the early diagnosis of cancer, yet current methods are restricted by poor tissue penetration and low specificity. We report T2SHNO2, an NIR-II anionic heptamethine cyanine probe, capable of selective and sensitive imaging of tumor-associated GSH. The probe is incorporated with 4-nitrobenzenethiol (NBT) as a GSH-responsive moiety that quenches fluorescence by photoinduced electron transfer (PET). Reaction with GSH triggers nucleophilic substitution, removing the NBT quencher and restoring NIR-II emission at 924 nm. In addition to being highly selective, T2SHNO2 is also highly stable at physiological pH. It has a low cytotoxicity and excellent biocompatibility, as confirmed by cytotoxicity assays. In vivo imaging of 4T1 tumor-bearing mice reveals strong tumor-specific fluorescence with high signal-to-background contrast. In a density functional theory analysis, the quenching mechanism and restoration of fluorescence are confirmed using PET. These observations render T2SHNO2 a sensitive, biocompatible, and stable probe for deep tissue imaging of tumor-related GSH, and this holds potential as an early cancer diagnostic and real-time therapeutic monitoring agent.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113482"},"PeriodicalIF":4.2,"publicationDate":"2025-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lysosomes-mitochondria dual targeted novel tetrahydrocarbazole-type fluorescent probe for real-time monitoring of viscosity in biological systems 溶酶体-线粒体双靶向新型四氢咔唑型荧光探针用于实时监测生物系统中的粘度

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-03 DOI: 10.1016/j.dyepig.2025.113480

Yixin Yang, Yue Gu, Yueyin Liang, Zhiyuan Meng, Shuai Gong, Zhonglong Wang, Shifa Wang

Lysosomes and mitochondria play key roles in various physiological processes in organisms. Mitochondria act as energy centers and are responsible for physiological functions such as cell metabolism, differentiation and apoptosis. Lysosomes contain a variety of hydrolytic enzymes that provide nutrients to cells by degrading and recycling macromolecules. Normal cell metabolism is maintained by the interaction of lysosomes and mitochondria. However, abnormal viscosity of lysosomes and mitochondria will lead to many diseases. Herein, a novel fluorescent probe TC-AP-A from nopinone was developed for the detection of viscosity changes in subcellular organelles in organisms. The red fluorescence of the probe was enhanced along with the increase of the viscosity. The proton-sensitive dimethylamino and pyridine groups conferred dual targeting capability to the probe. Probe TC-AP-A can be used as a powerful tool for detecting viscosity changes in subcellular organelles of organisms based on its outstanding advantages including good biocompatibility and large Stokes displacement (∼105 nm).

溶酶体和线粒体在生物体的各种生理过程中起着关键作用。线粒体作为能量中心，负责细胞代谢、分化和凋亡等生理功能。溶酶体含有多种水解酶，通过降解和循环大分子为细胞提供营养。正常的细胞代谢是由溶酶体和线粒体相互作用维持的。然而，溶酶体和线粒体的异常粘度会导致许多疾病。本文以诺蒎酮为原料，开发了一种新型荧光探针TC-AP-A，用于检测生物亚细胞细胞器的粘度变化。探针的红色荧光随黏度的增加而增强。质子敏感的二甲胺和吡啶基团赋予探针双重靶向能力。TC-AP-A探针具有良好的生物相容性和大的Stokes位移（~ 105 nm）等优点，可作为检测生物亚细胞细胞器粘度变化的有力工具。

{"title":"Lysosomes-mitochondria dual targeted novel tetrahydrocarbazole-type fluorescent probe for real-time monitoring of viscosity in biological systems","authors":"Yixin Yang, Yue Gu, Yueyin Liang, Zhiyuan Meng, Shuai Gong, Zhonglong Wang, Shifa Wang","doi":"10.1016/j.dyepig.2025.113480","DOIUrl":"10.1016/j.dyepig.2025.113480","url":null,"abstract":"<div><div>Lysosomes and mitochondria play key roles in various physiological processes in organisms. Mitochondria act as energy centers and are responsible for physiological functions such as cell metabolism, differentiation and apoptosis. Lysosomes contain a variety of hydrolytic enzymes that provide nutrients to cells by degrading and recycling macromolecules. Normal cell metabolism is maintained by the interaction of lysosomes and mitochondria. However, abnormal viscosity of lysosomes and mitochondria will lead to many diseases. Herein, a novel fluorescent probe TC-AP-A from nopinone was developed for the detection of viscosity changes in subcellular organelles in organisms. The red fluorescence of the probe was enhanced along with the increase of the viscosity. The proton-sensitive dimethylamino and pyridine groups conferred dual targeting capability to the probe. Probe TC-AP-A can be used as a powerful tool for detecting viscosity changes in subcellular organelles of organisms based on its outstanding advantages including good biocompatibility and large Stokes displacement (∼105 nm).</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113480"},"PeriodicalIF":4.2,"publicationDate":"2025-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design, synthesis and application of isomeric pyridine-based fluorescent probes via regioisomerism regulation strategy for β-Gal detection 基于区域异构调节策略的异构体吡啶荧光探针的设计、合成及应用

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-03 DOI: 10.1016/j.dyepig.2025.113477

Li Fu , Jiaqi Huang , Yixin Xie , Zhihong Tao , Jiwei Li , Wenjun Xu , Zhaoying Wang , Yiqun Liao , Meifang Li , Haijian Zhong , Jiangwei Tian , Min Yang

Based on our previous work, a series of isomeric pyridine-based fluorescent probes (Py-Gal) for β-Gal detection were successfully designed and synthesized via regio-isomerism regulation (RIR) strategy. After fully photophysical property study and β-Gal-response experiments, two fluorescent response approaches to β-Gal were found, one was turn-off type (such as Py-Gal-4), another was ratiometric type (such as Py-Gal-9). Among such, Py-Gal-9 exhibited a unique ratiometric approach once recognizing β-Gal with a red-shifted emission (∼79 nm). Due to its simplicity, reliability and rapid response, further fluorescence response experiments on time-/dose-dependent fluorescence change and selectivity/specificity estimation were operated, demonstrating that it had an excellent ability to monitor endogenous β-Gal activity. Mechanism studies through HRMS analysis, DFT calculations, molecular docking and colocalization experiment have theoretically verified the catalytic process between Py-Gal-9 and β-Gal. To develop its practical application, live-cell imaging and serum-sample analysis were carried out, revealing that it could effectively track β-Gal within cells and organisms. Overall, this probe would be promising in clinical diagnosis of β-Gal-related diseases for its high selectivity and reasonable sensitivity.

在前期工作的基础上，通过区域异构调节（RIR）策略，成功设计并合成了一系列用于β-Gal检测的异构体吡啶荧光探针（Py-Gal）。经过充分的光物理性质研究和β-Gal响应实验，发现了β-Gal的两种荧光响应方式，一种是关断型（如Py-Gal-4），另一种是比例型（如Py-Gal-9）。其中，Py-Gal-9在红移发射（~ 79 nm）中识别β-Gal后，表现出独特的比例测量方法。由于其简单、可靠和快速的反应，进一步进行了时间/剂量依赖性荧光变化和选择性/特异性估计的荧光响应实验，证明其具有良好的监测内源性β-Gal活性的能力。通过HRMS分析、DFT计算、分子对接和共定位实验等机理研究，从理论上验证了Py-Gal-9与β-Gal之间的催化过程。为了开发其实际应用，进行了活细胞成像和血清样本分析，揭示了它可以有效地跟踪细胞和生物体内的β-Gal。该探针具有较高的选择性和合理的灵敏度，在β- gal相关疾病的临床诊断中具有广阔的应用前景。

{"title":"Design, synthesis and application of isomeric pyridine-based fluorescent probes via regioisomerism regulation strategy for β-Gal detection","authors":"Li Fu , Jiaqi Huang , Yixin Xie , Zhihong Tao , Jiwei Li , Wenjun Xu , Zhaoying Wang , Yiqun Liao , Meifang Li , Haijian Zhong , Jiangwei Tian , Min Yang","doi":"10.1016/j.dyepig.2025.113477","DOIUrl":"10.1016/j.dyepig.2025.113477","url":null,"abstract":"<div><div>Based on our previous work, a series of isomeric pyridine-based fluorescent probes (Py-Gal) for β-Gal detection were successfully designed and synthesized via regio-isomerism regulation (RIR) strategy. After fully photophysical property study and β-Gal-response experiments, two fluorescent response approaches to β-Gal were found, one was turn-off type (such as Py-Gal-4), another was ratiometric type (such as Py-Gal-9). Among such, Py-Gal-9 exhibited a unique ratiometric approach once recognizing β-Gal with a red-shifted emission (∼79 nm). Due to its simplicity, reliability and rapid response, further fluorescence response experiments on time-/dose-dependent fluorescence change and selectivity/specificity estimation were operated, demonstrating that it had an excellent ability to monitor endogenous β-Gal activity. Mechanism studies through HRMS analysis, DFT calculations, molecular docking and colocalization experiment have theoretically verified the catalytic process between Py-Gal-9 and β-Gal. To develop its practical application, live-cell imaging and serum-sample analysis were carried out, revealing that it could effectively track β-Gal within cells and organisms. Overall, this probe would be promising in clinical diagnosis of β-Gal-related diseases for its high selectivity and reasonable sensitivity.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113477"},"PeriodicalIF":4.2,"publicationDate":"2025-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of donors on intramolecular photoinduced charge-transfer in π-conjugated donor-acceptor solutions for solar cells applications 应用于太阳能电池的π共轭给体-受体溶液中给体对分子内光诱导电荷转移的影响

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-02 DOI: 10.1016/j.dyepig.2025.113473

Amani A. Alsam

Photoinduced charge transfer kinetics are essential in assessing the appropriateness of organic materials for solar cell applications. This study utilized femtosecond-to-microsecond time-resolved spectroscopy to examine the excited-state kinetics of a series of π-conjugated donor–acceptor polymers featuring the potent electron-withdrawing unit ((E)-1,2-di(thiazol-2-yl) diazene) (ATZ) alongside three distinct donor moieties: thieno [3,2-b] thiophene (TT), 2,2′-bithiophene (BT), and (E)-1,2-di(thiophen-2-yl) ethene (DTV). Steady-state absorption, fluorescence, density functional theory (DFT) calculations, and transient absorption (TA) spectroscopy were conducted to clarify their photophysical behavior in the presence of 1,4-dicyanobenzene (DCB), a recognized electron acceptor. The findings indicate that intramolecular charge transfer from the donor segments (TT, BT, and DTV) to DCB predominates the excited-state deactivation mechanisms. DFT studies reveal that the highest occupied molecular orbitals (HOMOs) are delocalized along the polymer backbone, whereas the lowest unoccupied molecular orbitals (LUMOs) are predominantly localized on the donor units, hence promoting efficient electron transfer to DCB. These findings elucidate the charge-transfer mechanisms of ATz-based donor–acceptor polymers and underscore their potential for solar applications.

光致电荷转移动力学是评估有机材料是否适合太阳能电池应用的关键。本研究利用飞秒-微秒时间分辨光谱研究了一系列π共轭给体-受体聚合物的激发态动力学，这些聚合物具有强吸电子单元(（E)-1,2-二（噻唑-2-基）二氮烯）（ATZ）和三个不同的给体基团：噻吩[3,2-b]噻吩（TT）， 2,2 ' -二噻吩（BT）和(E)-1,2-二（噻吩-2-基）乙烯（DTV）。通过稳态吸收、荧光、密度泛函理论（DFT）计算和瞬态吸收（TA）光谱来阐明它们在1,4-二氨基苯（DCB）（公认的电子受体）存在下的光物理行为。研究结果表明，分子内电荷从供体片段（TT、BT和DTV）转移到DCB是激发态失活的主要机制。DFT研究表明，最高的已占据分子轨道（HOMOs）沿着聚合物主链离域，而最低的未占据分子轨道（LUMOs）主要定位在给体单元上，从而促进了电子向DCB的有效转移。这些发现阐明了基于atz的供体-受体聚合物的电荷转移机制，并强调了它们在太阳能应用中的潜力。

{"title":"Effect of donors on intramolecular photoinduced charge-transfer in π-conjugated donor-acceptor solutions for solar cells applications","authors":"Amani A. Alsam","doi":"10.1016/j.dyepig.2025.113473","DOIUrl":"10.1016/j.dyepig.2025.113473","url":null,"abstract":"<div><div>Photoinduced charge transfer kinetics are essential in assessing the appropriateness of organic materials for solar cell applications. This study utilized femtosecond-to-microsecond time-resolved spectroscopy to examine the excited-state kinetics of a series of π-conjugated donor–acceptor polymers featuring the potent electron-withdrawing unit ((E)-1,2-di(thiazol-2-yl) diazene) (ATZ) alongside three distinct donor moieties: thieno [3,2-b] thiophene (TT), 2,2′-bithiophene (BT), and (E)-1,2-di(thiophen-2-yl) ethene (DTV). Steady-state absorption, fluorescence, density functional theory (DFT) calculations, and transient absorption (TA) spectroscopy were conducted to clarify their photophysical behavior in the presence of 1,4-dicyanobenzene (DCB), a recognized electron acceptor. The findings indicate that intramolecular charge transfer from the donor segments (TT, BT, and DTV) to DCB predominates the excited-state deactivation mechanisms. DFT studies reveal that the highest occupied molecular orbitals (HOMOs) are delocalized along the polymer backbone, whereas the lowest unoccupied molecular orbitals (LUMOs) are predominantly localized on the donor units, hence promoting efficient electron transfer to DCB. These findings elucidate the charge-transfer mechanisms of ATz-based donor–acceptor polymers and underscore their potential for solar applications.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113473"},"PeriodicalIF":4.2,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iron phthalocyanine nanozyme enhances photodynamic antibacterial activity via enzyme-mimicking catalysis 铁酞菁纳米酶通过酶模拟催化增强光动力抗菌活性

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-01 DOI: 10.1016/j.dyepig.2025.113476

Ziming Li , Lei Cen , Chenxiang Lin , Yuxiang Chen , Jun-An Xiao , Peiyuan Li , Wei Su

Phototherapy is a promising strategy for treating bacterial infections due to its non-invasive nature and ability to avoid inducing drug resistance. Nevertheless, its full potential is hindered by the pathological microenvironment of infections, such as acidity, high hydrogen peroxide (H₂O₂) concentrations, and hypoxia. Nanozymes are artificial enzymes that exhibit natural enzymatic activity. They can mimic natural enzymes to catalyze the generation of reactive oxygen species (ROS) from oxygen (O₂) or H₂O₂, thereby improving the antibacterial efficacy of photodynamic therapy (PDT). Herein, a near-infrared light responsive nanozyme (FPN@PEG) was synthesized through the self-assembly of 1,8,15,22-tetrakis (N,N-dimethylamino)phthalocyane iron (Fe{Pc[α-N(CH₃)₂]₄}) with amphiphilic 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000 (DSPE-PEG₂₀₀₀) molecules in aqueous solution. FPN@PEG exhibits both catalase (CAT) and peroxidase (POD)-like activities, capable of catalyzing the conversion of H₂O₂ into O₂ and hydroxyl radicals (•OH). Additionally, FPN@PEG can further catalyze the transformation of O₂ into superoxide anions (O₂^•−), demonstrating oxidase (OXD)-like enzymatic activity, thereby enhancing the PDT effect. Furthermore, under 808 nm laser irradiation, FPN@PEG demonstrates excellent photothermal performance, which in turn promotes its nanozymatic catalytic activity. As a result of nanozymatic catalysis and phototherapy, FPN@PEG achieved a 100% inhibition rate against both Staphylococcus aureus (S. aureus) and methicillin-resistant Staphylococcus aureus (MRSA) under 808 nm laser irradiation, demonstrating excellent antimicrobial performance. This work offers valuable reference and inspiration for developing new antibacterial agents that effectively inhibit the activity of drug-resistant bacteria.

光疗由于其非侵入性和避免产生耐药性的能力，是治疗细菌感染的一种很有前途的策略。然而，感染的病理微环境（如酸性、高过氧化氢（H2O2）浓度和缺氧）阻碍了其充分发挥潜力。纳米酶是一种具有天然酶活性的人工酶。它们可以模拟天然酶，催化氧（O2）或H2O2生成活性氧（ROS），从而提高光动力治疗（PDT）的抗菌效果。本文通过1,8,15,22-四（N，N-二甲氨基）酞菁铁（Fe{Pc[α-N(CH3)2]4}）与两亲性的1,2-二硬脂酰-N-甘油-3-磷酸乙醇胺-N-[甲氧基（聚乙二醇）-2000 （DSPE-PEG2000）分子在水溶液中自组装，合成了近红外光响应纳米酶（FPN@PEG）。FPN@PEG具有过氧化氢酶（CAT）和过氧化物酶（POD）样活性，能够催化H2O2转化为O2和羟基自由基（•OH）。此外，FPN@PEG还能进一步催化O2转化为超氧阴离子（O2•−），表现出类似氧化酶（OXD）的酶活性，从而增强PDT效果。此外，在808 nm激光照射下，FPN@PEG表现出优异的光热性能，从而提高了其纳米酶催化活性。通过纳米酶催化和光疗，FPN@PEG在808 nm激光照射下对金黄色葡萄球菌（S. aureus）和耐甲氧西林金黄色葡萄球菌（MRSA）均有100%的抑制率，表现出优异的抗菌性能。本研究为开发有效抑制耐药菌活性的新型抗菌药物提供了有价值的参考和启示。

{"title":"Iron phthalocyanine nanozyme enhances photodynamic antibacterial activity via enzyme-mimicking catalysis","authors":"Ziming Li , Lei Cen , Chenxiang Lin , Yuxiang Chen , Jun-An Xiao , Peiyuan Li , Wei Su","doi":"10.1016/j.dyepig.2025.113476","DOIUrl":"10.1016/j.dyepig.2025.113476","url":null,"abstract":"<div><div>Phototherapy is a promising strategy for treating bacterial infections due to its non-invasive nature and ability to avoid inducing drug resistance. Nevertheless, its full potential is hindered by the pathological microenvironment of infections, such as acidity, high hydrogen peroxide (H2O2) concentrations, and hypoxia. Nanozymes are artificial enzymes that exhibit natural enzymatic activity. They can mimic natural enzymes to catalyze the generation of reactive oxygen species (ROS) from oxygen (O2) or H2O2, thereby improving the antibacterial efficacy of photodynamic therapy (PDT). Herein, a near-infrared light responsive nanozyme (FPN@PEG) was synthesized through the self-assembly of 1,8,15,22-tetrakis (N,N-dimethylamino)phthalocyane iron (Fe{Pc[α-N(CH3)2]4}) with amphiphilic 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000 (DSPE-PEG2000) molecules in aqueous solution. FPN@PEG exhibits both catalase (CAT) and peroxidase (POD)-like activities, capable of catalyzing the conversion of H2O2 into O2 and hydroxyl radicals (•OH). Additionally, FPN@PEG can further catalyze the transformation of O2 into superoxide anions (O2•−), demonstrating oxidase (OXD)-like enzymatic activity, thereby enhancing the PDT effect. Furthermore, under 808 nm laser irradiation, FPN@PEG demonstrates excellent photothermal performance, which in turn promotes its nanozymatic catalytic activity. As a result of nanozymatic catalysis and phototherapy, FPN@PEG achieved a 100% inhibition rate against both Staphylococcus aureus (S. aureus) and methicillin-resistant Staphylococcus aureus (MRSA) under 808 nm laser irradiation, demonstrating excellent antimicrobial performance. This work offers valuable reference and inspiration for developing new antibacterial agents that effectively inhibit the activity of drug-resistant bacteria.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113476"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanistic insights into the thermal ground-state recovery of salicylidene aniline photoswitches 水杨基苯胺光开关热基态恢复的机理研究

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-01 DOI: 10.1016/j.dyepig.2025.113472

Teodor-Aurelian Cucuiet , Isabella C.D. Merritt , Jean-Luc Pozzo, Frédéric Castet, Dario M. Bassani

Salicylidene aniline (SA) and its derivatives are attractive photochromes for many applications thanks to the environmental sensitivity of their photoswitching. While a large volume of work has been dedicated to understanding the photochemistry of SA, the mechanism by which the trans-keto photoproduct returns to the initial cis-keto form is underexplored in solution. This thermal relaxation has often been previously assumed to proceed via a trans-keto to cis-keto isomerization, as in the solid state. Through a combination of experimental lifetime measurements of such anils with various substituents and theoretical calculations, we show that in solution the thermal recovery is unlikely to occur via direct isomerization of the trans-keto form. Measured lifetimes are on the order of 10⁻⁴–10⁻⁵ s for all SA derivatives and are incompatible with theoretical predictions. We instead propose three alternative recovery mechanisms, involving an initial proton abstraction, addition, or enolization step before isomerization, which are consistent with experimental lifetimes and further supported by a strong primary isotope effect in deuterated ethanol. Overall, thermal relaxation of SA-based photochromes in solution is shown to be dependent on not only molecular substitution, but also environmental factors, making prediction of the lifetime of the photoproduct a complex problem.

水杨基苯胺（SA）及其衍生物由于其光开关的环境敏感性，在许多应用中都是有吸引力的光致变色材料。虽然大量的工作已经致力于了解SA的光化学，但反式酮光产物在溶液中恢复到初始顺式酮形式的机制尚未得到充分探索。这种热弛豫通常被认为是通过反式酮到顺式酮异构化进行的，就像在固态中一样。通过结合各种取代基的实验寿命测量和理论计算，我们表明，在溶液中，通过反式酮形式的直接异构化，热恢复不太可能发生。所有SA衍生物的测量寿命为10−4-10−5 s，与理论预测不相容。我们提出了三种可选的恢复机制，包括异构化前的初始质子提取、加成或烯醇化步骤，这些机制与实验寿命一致，并进一步得到了氘化乙醇中强烈的初级同位素效应的支持。总的来说，sa基光致变色材料在溶液中的热弛豫不仅取决于分子取代，还取决于环境因素，这使得光产物寿命的预测成为一个复杂的问题。

{"title":"Mechanistic insights into the thermal ground-state recovery of salicylidene aniline photoswitches","authors":"Teodor-Aurelian Cucuiet , Isabella C.D. Merritt , Jean-Luc Pozzo, Frédéric Castet, Dario M. Bassani","doi":"10.1016/j.dyepig.2025.113472","DOIUrl":"10.1016/j.dyepig.2025.113472","url":null,"abstract":"<div><div>Salicylidene aniline (SA) and its derivatives are attractive photochromes for many applications thanks to the environmental sensitivity of their photoswitching. While a large volume of work has been dedicated to understanding the photochemistry of SA, the mechanism by which the trans-keto photoproduct returns to the initial cis-keto form is underexplored in solution. This thermal relaxation has often been previously assumed to proceed via a trans-keto to cis-keto isomerization, as in the solid state. Through a combination of experimental lifetime measurements of such anils with various substituents and theoretical calculations, we show that in solution the thermal recovery is unlikely to occur via direct isomerization of the trans-keto form. Measured lifetimes are on the order of 10−4–10−5 s for all SA derivatives and are incompatible with theoretical predictions. We instead propose three alternative recovery mechanisms, involving an initial proton abstraction, addition, or enolization step before isomerization, which are consistent with experimental lifetimes and further supported by a strong primary isotope effect in deuterated ethanol. Overall, thermal relaxation of SA-based photochromes in solution is shown to be dependent on not only molecular substitution, but also environmental factors, making prediction of the lifetime of the photoproduct a complex problem.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113472"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dye aggregation in solutions and adsorption on A semiconductor surface: A combined molecular dynamics and first principles study 染料在溶液中的聚集和在半导体表面的吸附：分子动力学和第一性原理的结合研究

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-01 DOI: 10.1016/j.dyepig.2025.113471

Kun Gong , Fang Xu , Zhen Zhao , Ke-Jian Jiang , Wei Li , Dongzhi Liu , Xueqin Zhou

Understanding the microscopic dynamics of dye aggregation in solutions and adsorption on semiconductor surfaces is crucial for controlling material properties and, consequently, the performance of photoelectric devices. This study thoroughly examined the solution aggregation behavior of two triphenylamine dyes, (E)-2-cyano-3-(4-((E)-4-(di-p-tolylamino)styryl)phenyl)acrylic acid (MTPAcc) and (E)-2-cyano-3-(2-((7-((E)-4-(di-p-tolylamino)styryl)-2-methyl-2H-benzo[d][1,2,3]triazol-4-yl)amino)pyrimidin-5-yl)acrylic acid (MTPABT-Pyc), and its impact on the interfacial adsorption on a titanium dioxide (TiO₂) surface using a combination of classical molecular dynamics and first principles methods. MTPAcc molecules form unstable dimers featuring intermolecular hydrogen bonds at the carboxylic acid groups. The dimers easily disintegrate in dichloromethane (DCM) with lifetimes shorter than 500 ps. In ethanol (EtOH), MTPAcc molecules predominantly exist as monomers. These suggests that MTPAcc dyes may adsorb on the TiO₂ surface in their monomeric form. In contrast, the elongated aromatic framework of MTPABT-Pyc promotes π-π stacking, leading to the stable packing dimers. The MTPABT-Pyc molecules stack in the same orientation in DCM and opposite orientation in EtOH. Their structural stability enables dimeric adsorption on the TiO₂ surface. The attachment of the dye molecules along both the latitudinal (X) and longitudinal (Y) directions simultaneously results in a sterically favorable H-aggregation monolayer, derived from the stronger electronic coupling in the Y direction than that in the X direction. The theoretical calculations in this study clearly depict the dynamic aggregation and adsorption process of organic dyes in solutions and on a semiconductor surface, which should generate interest in aggregation and adsorption science.

了解染料在溶液中聚集和在半导体表面上吸附的微观动力学对于控制材料性质以及光电器件的性能至关重要。本研究采用经典分子动力学和第原理相结合的方法，深入研究了两种三苯胺染料(E)-2-氰-3-(4-（E)-4-（二对苯胺）苯基苯基）丙烯酸（MTPAcc）和(E)-2-氰-3-（2-（7-（E)-4-（二对苯胺）苯基）-2-甲基- 2h -苯并[d][1,2,3]三唑-4-基）氨基嘧啶-5-基）丙烯酸（MTPABT-Pyc）的溶液聚集行为及其对二氧化钛（TiO2）表面界面吸附的影响。MTPAcc分子形成不稳定的二聚体，在羧基上具有分子间氢键。二聚体在二氯甲烷（DCM）中容易分解，寿命短于500ps。在乙醇（EtOH）中，MTPAcc分子主要以单体形式存在。这表明MTPAcc染料可能以其单体形式吸附在TiO2表面。相比之下，MTPABT-Pyc的细长芳香骨架促进了π-π的堆积，导致了稳定的堆积二聚体。MTPABT-Pyc分子在DCM中以相同的取向堆叠，在EtOH中以相反的取向堆叠。它们的结构稳定性使得二聚体能够在TiO2表面吸附。染料分子沿纬度(X)和纵向(Y)方向的附着同时形成了一个空间上有利的h聚集单层，这是由于Y方向的电子耦合比X方向的电子耦合更强。本研究的理论计算清楚地描述了有机染料在溶液和半导体表面上的动态聚集和吸附过程，这应该引起人们对聚集和吸附科学的兴趣。

{"title":"Dye aggregation in solutions and adsorption on A semiconductor surface: A combined molecular dynamics and first principles study","authors":"Kun Gong , Fang Xu , Zhen Zhao , Ke-Jian Jiang , Wei Li , Dongzhi Liu , Xueqin Zhou","doi":"10.1016/j.dyepig.2025.113471","DOIUrl":"10.1016/j.dyepig.2025.113471","url":null,"abstract":"<div><div>Understanding the microscopic dynamics of dye aggregation in solutions and adsorption on semiconductor surfaces is crucial for controlling material properties and, consequently, the performance of photoelectric devices. This study thoroughly examined the solution aggregation behavior of two triphenylamine dyes, (E)-2-cyano-3-(4-((E)-4-(di-p-tolylamino)styryl)phenyl)acrylic acid (MTPAcc) and (E)-2-cyano-3-(2-((7-((E)-4-(di-p-tolylamino)styryl)-2-methyl-2H-benzo[d][1,2,3]triazol-4-yl)amino)pyrimidin-5-yl)acrylic acid (MTPABT-Pyc), and its impact on the interfacial adsorption on a titanium dioxide (TiO2) surface using a combination of classical molecular dynamics and first principles methods. MTPAcc molecules form unstable dimers featuring intermolecular hydrogen bonds at the carboxylic acid groups. The dimers easily disintegrate in dichloromethane (DCM) with lifetimes shorter than 500 ps. In ethanol (EtOH), MTPAcc molecules predominantly exist as monomers. These suggests that MTPAcc dyes may adsorb on the TiO2 surface in their monomeric form. In contrast, the elongated aromatic framework of MTPABT-Pyc promotes π-π stacking, leading to the stable packing dimers. The MTPABT-Pyc molecules stack in the same orientation in DCM and opposite orientation in EtOH. Their structural stability enables dimeric adsorption on the TiO2 surface. The attachment of the dye molecules along both the latitudinal (X) and longitudinal (Y) directions simultaneously results in a sterically favorable H-aggregation monolayer, derived from the stronger electronic coupling in the Y direction than that in the X direction. The theoretical calculations in this study clearly depict the dynamic aggregation and adsorption process of organic dyes in solutions and on a semiconductor surface, which should generate interest in aggregation and adsorption science.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113471"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluorescence resonance energy transfer induced broadband photoresponse for highly efficient solar-driven photocatalysis 荧光共振能量转移诱导宽带光响应的高效太阳能驱动光催化

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-11-30 DOI: 10.1016/j.dyepig.2025.113475

Guotao Xiang , Qinyu Xu , Zhiyu Yang , Yongjie Wang , Lu Yao , Sha Jiang , Xianju Zhou , Li Li , Xiaojun Wang , Jiahua Zhang

Developing efficient photocatalysts with near-infrared (NIR) light responsiveness to enhance solar energy utilization efficiency holds significant scientific importance. In this work, β-NaLuF₄: Yb³⁺/Tm³⁺ upconversion nanoparticles are selected as the NIR light converter and integrated with the non-metallic semiconductor graphitic carbon nitride (g-C₃N₄) to fabricate a photocatalytic material β-NaLuF₄: Yb³⁺/Tm³⁺@SiO₂@g-C₃N₄ (LTSC), which can simultaneously respond to ultraviolet, visible and NIR light. Spectroscopic analysis, including photoluminescence spectra and lifetime decay curves of the samples, reveals a highly efficient fluorescence resonance energy transfer (FRET) mechanism between Tm³⁺: ¹I₆ and ¹D₂ state and g-C₃N₄, which allows g-C₃N₄ to generate photoinduced carriers under NIR light irradiation for photocatalytic reactions. Quantitative evaluation using Rhodamine B as a model pollutant demonstrates that LTSC exhibits exceptional photodegradation efficiency and rate under the solar illumination, outperforming conventional photocatalysts in the corresponding class. Additionally, the photocatalytic mechanism is systematically elucidated through comprehensive photoelectrochemical characterizations. This work not only provides a highly efficient broadband responsive photocatalyst LTSC, but also establishes a rational design strategy for developing such materials.

开发具有近红外响应性的高效光催化剂以提高太阳能利用效率具有重要的科学意义。本研究选择β-NaLuF4: Yb3+/Tm3+上转换纳米粒子作为近红外光转换器，与非金属半导体石墨化碳氮化碳（g-C3N4）集成，制备出可同时响应紫外光、可见光和近红外光的光催化材料β-NaLuF4: Yb3+/Tm3+@SiO2@g-C3N4 （LTSC）。光谱分析，包括样品的光致发光光谱和寿命衰减曲线，揭示了Tm3+: 1I6和1D2态与g-C3N4之间的高效荧光共振能量转移（FRET）机制，使g-C3N4在近红外光照射下产生光诱导载流子进行光催化反应。以罗丹明B为模型污染物的定量评价表明，LTSC在太阳光照下表现出优异的光降解效率和速率，优于同类常规光催化剂。此外，通过全面的光电化学表征，系统地阐明了光催化机理。这项工作不仅提供了一种高效的宽带响应光催化剂LTSC，而且为开发这种材料建立了合理的设计策略。

{"title":"Fluorescence resonance energy transfer induced broadband photoresponse for highly efficient solar-driven photocatalysis","authors":"Guotao Xiang , Qinyu Xu , Zhiyu Yang , Yongjie Wang , Lu Yao , Sha Jiang , Xianju Zhou , Li Li , Xiaojun Wang , Jiahua Zhang","doi":"10.1016/j.dyepig.2025.113475","DOIUrl":"10.1016/j.dyepig.2025.113475","url":null,"abstract":"<div><div>Developing efficient photocatalysts with near-infrared (NIR) light responsiveness to enhance solar energy utilization efficiency holds significant scientific importance. In this work, β-NaLuF4: Yb3+/Tm3+ upconversion nanoparticles are selected as the NIR light converter and integrated with the non-metallic semiconductor graphitic carbon nitride (g-C3N4) to fabricate a photocatalytic material β-NaLuF4: Yb3+/Tm3+@SiO2@g-C3N4 (LTSC), which can simultaneously respond to ultraviolet, visible and NIR light. Spectroscopic analysis, including photoluminescence spectra and lifetime decay curves of the samples, reveals a highly efficient fluorescence resonance energy transfer (FRET) mechanism between Tm3+: 1I6 and 1D2 state and g-C3N4, which allows g-C3N4 to generate photoinduced carriers under NIR light irradiation for photocatalytic reactions. Quantitative evaluation using Rhodamine B as a model pollutant demonstrates that LTSC exhibits exceptional photodegradation efficiency and rate under the solar illumination, outperforming conventional photocatalysts in the corresponding class. Additionally, the photocatalytic mechanism is systematically elucidated through comprehensive photoelectrochemical characterizations. This work not only provides a highly efficient broadband responsive photocatalyst LTSC, but also establishes a rational design strategy for developing such materials.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113475"},"PeriodicalIF":4.2,"publicationDate":"2025-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly efficient circularly polarized phosphorescent electroluminescence from rosin-based Ir(III) complexes 松香基Ir（III）配合物的高效圆偏振磷光电致发光

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-11-29 DOI: 10.1016/j.dyepig.2025.113474

Wei-Hua Zhang , Xiao-Xia Li , Xin-Chen Wang , Bi-Hai Tong , Yan-Qin Miao , Guo-Dong Li

Chiral iridium(III) complexes have garnered significant attention in the fields of circularly polarized luminescence (CPL) materials and sensors, yet the variety of available chiral ligands remains limited. In this study, we report three novel chiral Ir(III) complexes (i.e., Ir(dba)₂(da3f), Ir(dba)₂(da5f) and Ir(dba)₂(da7f)) with β-diketone ligands derived from naturally chiral pure rosin. The presence of intramolecular hydrogen bonding enhances the rigidity and thermal stability of these complexes. All three complexes exhibited thermal decomposition temperatures (at 5 % weight loss) exceeding 200 °C. The dissymmetry factors (g_PL) of Ir(dba)₂(da5f) and Ir(dba)₂(da7f) were measured as 2.0 × 10⁻³ and 2.9 × 10⁻³, respectively. All complexes demonstrated moderate photoluminescence quantum yields (PLQY) (43.0 %–53.8 %) and short excited-state lifetimes (1.05–1.13 μs). OLED Devices of the three complexes were successfully fabricated through vacuum deposition, with the Ir(dba)₂(da5f)-based device (D2) showing the optimal performance, with maximum current efficiency (CE_max), maximum power efficiency (PE_max), and maximum external quantum efficiency (EQE_max) of 33.2 cd A⁻¹, 27.8 lm W⁻¹, and 13.2 %, respectively. Furthermore, this device demonstrated a strong circularly polarized electroluminescence (CPEL) signal with a dissymmetry factor (g_EL) of 1.40 × 10⁻³. This study demonstrates the feasibility of employing dehydroabietic acid derivatives as chiral ligands in circularly polarized luminescence materials.

手性铱（III）配合物在圆偏振发光（CPL）材料和传感器领域引起了极大的关注，但可用的手性配体的种类仍然有限。在这项研究中，我们报道了三种新的手性Ir（III）配合物(即Ir(dba)2(da3f), Ir(dba)2（da5f）和Ir（dba)2(da7f)）与天然手性纯松香衍生的β-二酮配体。分子内氢键的存在提高了这些配合物的刚性和热稳定性。这三种配合物的热分解温度（失重5%）均超过200℃。测定了Ir(dba)2（da5f）和Ir(dba)2（da7f）的不对称因子（gPL）分别为2.0 × 10−3和2.9 × 10−3。所有配合物均具有中等的光致发光量子产率（PLQY）（43.0% ~ 53.8%）和较短的激发态寿命（1.05 ~ 1.13 μs）。通过真空沉积成功制备了三种配合物的OLED器件，其中基于Ir(dba)2（da5f）的器件（D2）表现出最佳性能，最大电流效率（CEmax）、最大功率效率（PEmax）和最大外量子效率（EQEmax）分别为33.2 cd A−1、27.8 lm W−1和13.2%。此外，该器件显示出强圆极化电致发光（CPEL）信号，其不对称因子（gEL）为1.40 × 10−3。本研究证明了将脱氢枞酸衍生物作为手性配体应用于圆极化发光材料的可行性。

{"title":"Highly efficient circularly polarized phosphorescent electroluminescence from rosin-based Ir(III) complexes","authors":"Wei-Hua Zhang , Xiao-Xia Li , Xin-Chen Wang , Bi-Hai Tong , Yan-Qin Miao , Guo-Dong Li","doi":"10.1016/j.dyepig.2025.113474","DOIUrl":"10.1016/j.dyepig.2025.113474","url":null,"abstract":"<div><div>Chiral iridium(III) complexes have garnered significant attention in the fields of circularly polarized luminescence (CPL) materials and sensors, yet the variety of available chiral ligands remains limited. In this study, we report three novel chiral Ir(III) complexes (i.e., Ir(dba)2(da3f), Ir(dba)2(da5f) and Ir(dba)2(da7f)) with β-diketone ligands derived from naturally chiral pure rosin. The presence of intramolecular hydrogen bonding enhances the rigidity and thermal stability of these complexes. All three complexes exhibited thermal decomposition temperatures (at 5 % weight loss) exceeding 200 °C. The dissymmetry factors (gPL) of Ir(dba)2(da5f) and Ir(dba)2(da7f) were measured as 2.0 × 10−3 and 2.9 × 10−3, respectively. All complexes demonstrated moderate photoluminescence quantum yields (PLQY) (43.0 %–53.8 %) and short excited-state lifetimes (1.05–1.13 μs). OLED Devices of the three complexes were successfully fabricated through vacuum deposition, with the Ir(dba)2(da5f)-based device (D2) showing the optimal performance, with maximum current efficiency (CEmax), maximum power efficiency (PEmax), and maximum external quantum efficiency (EQEmax) of 33.2 cd A−1, 27.8 lm W−1, and 13.2 %, respectively. Furthermore, this device demonstrated a strong circularly polarized electroluminescence (CPEL) signal with a dissymmetry factor (gEL) of 1.40 × 10−3. This study demonstrates the feasibility of employing dehydroabietic acid derivatives as chiral ligands in circularly polarized luminescence materials.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113474"},"PeriodicalIF":4.2,"publicationDate":"2025-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0