Dyes and Pigments最新文献_第7页

B←N orientations and numbers driven regulation of packing modes and optoelectronic properties to realize panchromatic emission B←N取向和数量驱动封装模式和光电子特性的调节，实现全色发射

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-31 DOI: 10.1016/j.dyepig.2025.113542

Weibin Chen , Zepeng Wei , Muyi Cai , Nuo Xu , Qing Zhang , Geng-Geng Luo , Yalian Weng , Jianhua Huang

B←N-embedded heteroaromatic molecules have been focused with great interests due to their unique optoelectronic properties and potential applications to electronic devices. Otherwise, studies on regulating the optoelectronic properties and packing modes by tailoring the B←N orientations have not been disclosed. Herein, based on two diazine moieties, i.e., pyrazine and pyrimidine, we designed four B←N-embedded molecules with different B←N orientations and numbers. The packing modes, absorption spectra, bandgaps, and photoluminescence properties are finely tuned by varying the B←N orientations and numbers. Interestingly, the isomers of pyrazine-derived p-2BN and pyrimidine-derived m-2BN exhibit completely different optical bandgaps (1.89 vs 2.54 eV), emission colors (red vs blue), full width at half maximum (fwhm, 97 vs 36 nm), and Stokes shifts (82 vs 10 nm), although their elementary compositions are exactly identical. Red, green, and blue emission colors are reached by tailoring the B←N orientations and numbers and panchromatic emission with CIE coordinate (0.32, 0.32) is realized by mixing the three colors. This work extended pathway of regulating optoelectronic properties of B←N-embedded heteroaromatic molecules, which can be widely applied to the design of B←N-embedded functional molecules.

嵌入B←n的杂芳香分子由于其独特的光电性质和在电子器件中的潜在应用而引起了人们的极大兴趣。另外，通过调整B←N取向来调节光电性能和封装模式的研究尚未公开。本文以吡嗪和嘧啶这两个嘧啶基团为基础，设计了4个B←N取向和数目不同的B←N嵌入分子。通过改变B←N的取向和数量，可以很好地调整填料模式、吸收光谱、带隙和光致发光性能。有趣的是，吡嗪衍生的p- 20和嘧啶衍生的m- 20的异构体表现出完全不同的光学带隙（1.89 vs 2.54 eV），发射颜色（红色vs蓝色），最大半宽（fwhm, 97 vs 36 nm）和斯托克斯位移（82 vs 10 nm），尽管它们的基本成分完全相同。通过调整B←N的方向和数量，可以获得红、绿、蓝三种发射色，三种颜色混合可以实现具有CIE坐标（0.32,0.32）的全色发射。本工作拓展了B←n包埋杂芳香分子光电特性的调控途径，可广泛应用于B←n包埋功能分子的设计。

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引用次数: 0

Tyrosine-derived carbon dots as a highly sensitive sensor for nitroxynil in food, urine, and live cells 酪氨酸衍生的碳点作为食物、尿液和活细胞中硝基的高灵敏度传感器

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-31 DOI: 10.1016/j.dyepig.2025.113512

Hao Tang , Jindong Dai , Jian Shen , Mian Zhang , Xue Xia , Thangamani Kanagaraj , Dongwei Zhu , Kanagaraj Rajalakshmi , Muthusamy Selvaraj , Siyi Wu , Xiaodong Zhou

Nitroxynil (NIT) is a commonly used veterinary medicine to treat fascioliasis in food and milk producing cattle and sheep. The residues from the edible animal food products cause severe health issues in humans. Therefore, it is of significant importance to generate an analytical approach for the detection of NIT in food products. Herein, the tyrosine derived carbon dots (T-CDs) were successfully synthesized by a simple one step hydrothermal method using tyrosine and ethylenediamine. The preparation conditions of T-CDs were optimized and analysed by UV–vis spectroscopy, fluorescence spectroscopy, PXRD, TEM, FT-IR and XPS. T-CDs shows high selectivity, good anti-interference ability (1500–fold), high sensitivity (LOD: 5.2 nM), fast response (5 min) towards the detection of NIT. T-CDs expressed contrast fluorescent confocal images depending on its concentration and NIT concentration. The detection of NIT in food samples such as cow meat, mutton, cow milk and also human urine samples was demonstrated. Good recovery results were achieved and the acquired findings were validated by HPLC detection method. All of the results prove that the present sensing strategy is simple, sensitive, selective towards NIT in food and urine samples, it provides a pathway to create an interesting new fluorescent sensor for the estimation of NIT.

硝基尼（NIT）是一种常用的兽药，用于治疗食用和产奶牛羊的片吸虫病。食用动物性食品的残留物对人类造成严重的健康问题。因此，建立一种检测食品中NIT的分析方法具有重要意义。本文以酪氨酸和乙二胺为原料，采用简单的一步水热法制备了酪氨酸衍生碳点（T-CDs）。通过紫外可见光谱、荧光光谱、PXRD、TEM、FT-IR和XPS对T-CDs的制备条件进行了优化和分析。T-CDs对NIT的检测具有高选择性、良好的抗干扰能力（1500倍）、高灵敏度（LOD: 5.2 nM）、快速响应（5 min）。T-CDs根据其浓度和NIT浓度表达对比度荧光共聚焦图像。证明了在牛肉、羊肉、牛奶和人类尿液样本中检测NIT的方法。得到了良好的回收率，并通过高效液相色谱法验证了所得结果。结果表明，该传感策略对食物和尿液样品中的NIT具有简单、灵敏、选择性好等特点，为NIT估测提供了一种有趣的新型荧光传感器。

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引用次数: 0

Fluorene-based gold(I)-containing AIEgens with substituents exhibiting diverse electronic effects: hypsochromic mechanofluorochromism, force-induced substantial weakening of fluorescence intensity and its anti-counterfeiting application 具有取代基的含芴金(I)的AIEgens具有多种电子效应：亚变色机械荧光变色，力致荧光强度大幅减弱及其防伪应用

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-30 DOI: 10.1016/j.dyepig.2025.113544

Shanting Liu , Xi Kang , Bumeng Guo , Zewei Song , Shuang Li , Yinghan Li , Sheng Hua Liu , Zhao Chen

Due to their distinctive stimulus-responsive properties, materials exhibiting hypsochromic mechanofluorochromism (MFC) or force-induced substantial weakening of fluorescence intensity have demonstrated remarkable application potential in the field of information security. This study designed and synthesized two novel fluorene-based dinuclear gold(I) complexes, 1 and 2. Both molecules exhibited aggregation-induced emission (AIE) characteristics. Specifically, complex 1 showed reversible hypsochromic MFC. In contrast, complex 2 exhibited force-induced substantial weakening of fluorescence intensity. It is worth noting that 2 is the first example of gold(I)-based luminogen capable of simultaneously exhibiting AIE and force-induced substantial weakening of fluorescence intensity. Based on the force-induced significant fluorescence attenuation feature of luminogenic complex 2, an interesting information anticounterfeiting system involving a pizza model was successfully established. This work not only reports the first example of AIE-active gold(I) complex featuring anisotropic mechanical force-induced pronounced fluorescence reduction but also provides a valuable reference for anticounterfeit applications of mechanically responsive luminogens.

由于其独特的刺激响应特性，具有次变色机械荧光变色（MFC）或力致荧光强度大幅减弱的材料在信息安全领域显示出显着的应用潜力。本研究设计并合成了两种新型芴基双核金(I)配合物1和2。两种分子均表现出聚集诱导发射（AIE）特性。具体来说，配合物1表现出可逆的低色MFC。相反，配合物2表现出力诱导的荧光强度明显减弱。值得注意的是，2是第一个能够同时表现出AIE和力诱导的荧光强度大幅减弱的金(I)基发光材料。基于致发光配合物2的力致显著荧光衰减特性，成功建立了一个涉及披萨模型的有趣信息防伪系统。本工作不仅首次报道了aie -活性金(I)配合物具有各向异性机械力诱导的显著荧光还原特性，而且为机械响应发光物质的防伪应用提供了有价值的参考。

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引用次数: 0

Thermally activated delayed fluorescence with methyl-modified triazine acceptors for efficient organic light-emitting diodes 热激活延迟荧光与甲基修饰三嗪受体的高效有机发光二极管

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-30 DOI: 10.1016/j.dyepig.2025.113543

Xiaoting Feng , Xinyu Li , Tao Liu , Zixuan Wei , Huixia Xu , Yanqin Miao

Thermally activated delayed fluorescent (TADF) molecules have exhibited the large potentials in organic light-emitting diodes (OLEDs). The electron-donating (D) and electron-withdrawing (A) groups are employed to construct TADF molecules, which leads to completely charge-transfer (CT) singlet (S₁) and triplet (T₁) states, weak spin-orbit coupling (SOC), and inefficient reverse intersystem crossing (RISC). Herein, we adjust the electron-withdrawing ability of triazine (TRZ) via methyl substitution to design DPT, and link them with planar indolocarbazole (ICz) donors to design three TADF emitters with D-A (Ph-ICz-DPT) and A-D-A (ICz-2DPT, tICz-2DPT) architectures, achieving SOC matrix element of 0.537 cm⁻¹ and fast RISC process (

k_{R I S C}

= 5.33 × 10⁵ s⁻¹). The devices based on Ph-ICz-DPT show a maximum external quantum efficiency (

{E Q E}_{\max}

) of 20.2 %, the maximum current efficiency (

{C E}_{\max}

) of 42.6 cd/A and the maximum power efficiency (

{P E}_{\max}

) of 26.9 lm/W, respectively. This work demonstrates that subtle chemical modifications can significantly enhance TADF emitter performance.

热激活延迟荧光（TADF）分子在有机发光二极管（oled）中表现出较大的电势。利用给电子(D)和吸电子(A)基团构建TADF分子，导致完全电荷转移（CT）单重态（S1）和三重态（T1），弱自旋轨道耦合（SOC）和低效的反向系统间交叉（RISC）。本文通过甲基取代调整三嗪（TRZ）的吸电子能力来设计DPT，并将其与平面吲哚咔唑（ICz）给体连接，设计了3种具有D-A （Ph-ICz-DPT）和A-D-A （ICz- 2dpt, tICz-2DPT）结构的TADF发射体，实现了SOC矩阵元素0.537 cm−1和快速RISC处理（kRISC = 5.33 × 105 s−1）。基于Ph-ICz-DPT的器件最大外量子效率（EQEmax）为20.2%，最大电流效率（CEmax）为42.6 cd/ a，最大功率效率（PEmax）为26.9 lm/W。这项工作表明，细微的化学修饰可以显著提高TADF发射极的性能。

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引用次数: 0

Dual-ligand-assisted QD-silica composite for improved stability and color conversion in quantum dot enhancement film applications 双配体辅助qd -二氧化硅复合材料在量子点增强膜应用中提高稳定性和颜色转换

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-30 DOI: 10.1016/j.dyepig.2025.113545

Yoon-Jeong Choi , Chil Won Lee , Jang Sub Kim , Jong-Gyu Kim , Jeong-Yeol Yoo , Byung Doo Chin

Quantum dots (QDs) have attract attention in multiple fields as next-generation light-emitting materials. Achieving high photoluminescent (PL) performance remains a major challenge, such as low stability under harsh conditions for QD-based display applications. To improve their thermal and photo-stability, this work introduces a modified reverse microemulsion method for silica encapsulation and composite preparation with QDs, using a dual ligand exchange strategy with (3-mercaptopropyl)methyldimethoxysilane (MPMDMS) and 3-mercaptopropionic acid (MPA). This hydrophilic surface modification enables uniform silica shell formation through confined hydrolysis within aqueous micellar environments. The resulting silica-coated QDs (MPA-SQDs) retain narrow PL emissions and show significantly improved stability, maintaining 89 % of their PL intensity and 79 % of their PLQY after thermal aging at 120 °C, and 84 % of their PL intensity and 72 % of their PLQY after continuous UV irradiation for 7 days. These findings show an effective dual-ligand-assisted silica encapsulation method that offers enhanced environmental durability and optical stability. Due to their enhanced photothermal stability and color purity, the QD-silica composites developed in this work demonstrate strong potential as stable color conversion materials in QD-enhanced films (QDEF) and related display applications.

量子点作为下一代发光材料在多个领域受到广泛关注。实现高光致发光（PL）性能仍然是一个主要挑战，例如基于量子点的显示应用在恶劣条件下的低稳定性。为了提高量子点的热稳定性和光稳定性，本文采用（3-巯基丙基）甲基二甲氧基硅烷（MPMDMS）和3-巯基丙酸（MPA）的双配体交换策略，提出了一种改进的反相微乳法制备二氧化硅包封和量子点复合材料。这种亲水性表面改性使得在水性胶束环境中通过受限水解形成均匀的硅壳。得到的二氧化硅包覆量子点（MPA-SQDs）保持了狭窄的发光，并表现出显著提高的稳定性，在120°C热老化后保持了89%的发光强度和79%的PLQY，在连续紫外线照射7天后保持了84%的发光强度和72%的PLQY。这些发现表明了一种有效的双配体辅助二氧化硅封装方法，提供了增强的环境耐久性和光学稳定性。由于其增强的光热稳定性和颜色纯度，本工作中开发的qd -二氧化硅复合材料在qd增强薄膜（QDEF）和相关显示应用中显示出强大的稳定颜色转换材料潜力。

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引用次数: 0

Systematic development of quinolinium-based NIR probes for targeting subdomain IB region of human serum albumin 基于喹啉的人血清白蛋白IB亚区近红外探针的系统研制

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-30 DOI: 10.1016/j.dyepig.2025.113535

Yo-Cheng Chang , Shang-Wei Lin , Yu-Cing Wu , Pin-Han Lin , Yi-Jen Chen , Wei-Min Liu

Human Serum albumin (HSA), the most abundant serum protein in blood plasma, plays a crucial role as a transport protein for both endogenous metabolites and exogenous drugs, making it essential for understanding drug pharmacokinetics. Among various analytical methods, fluorescent probe technology stands out as a powerful tool for analysing the binding sites and binding characteristics of drugs-HSA interactions. However, most reported fluorescent probes bind exclusively to either subdomain IIA or subdomain IIIA of HSA, significantly limiting their applicability. In this study, a series of fluorogenic probes featuring a donor-π-acceptor (D-π-A) system was systematically explored. We found that probes containing a quinolinium moiety target the subdomain IB region of HSA and demonstrate good selectivity towards HSA. This observation also agrees with our computational studies. Notably, enhancing the lipophilicity of the acceptor moiety, rather than increasing the steric hindrance of the donor, improved both selectivity and binding affinity toward HSA. Among the developed probes, HSAtag-3-14C exhibited a remarkable fluorescence enhancement (∽2000-fold) upon binding to HSA, with emission in the near-infrared region. The dissociation constant of HSAtag-3-14C was determined to be 17.8 ± 2.6 μM at 25 °C, and its limit of detection was 0.28 ± 0.01 nM. In addition, MD simulations were performed to investigate interactions between the HSAtag-3 series and HSA. The binding of HSAtag-3-14C is predominantly driven by hydrophobic interactions, with a nonpolar pocket formed by Leu115, Pro118, and Ile142 providing a favorable environment for stabilizing the aliphatic chain. In contrast, HSAtag-3 binding is mainly governed by electrostatic interactions. These results suggest that extending the alkyl chain length is an effective strategy to enhance HSA binding affinity, consistent with its role as a fatty acid–binding protein.

人血清白蛋白（Human Serum albumin， HSA）是血浆中含量最多的血清蛋白，是内源性代谢物和外源性药物的转运蛋白，对了解药物的药代动力学至关重要。在各种分析方法中，荧光探针技术是分析药物- hsa相互作用结合位点和结合特性的有力工具。然而，大多数报道的荧光探针只能结合HSA的IIA或IIIA亚域，这大大限制了它们的适用性。本研究系统探索了一系列具有供体-π-受体（D-π-A）体系的荧光探针。我们发现含有喹啉基团的探针靶向HSA的IB亚结构域，并对HSA表现出良好的选择性。这一观察结果也与我们的计算研究相一致。值得注意的是，增强受体部分的亲脂性，而不是增加供体的空间位阻，提高了对HSA的选择性和结合亲和力。在所研制的探针中，HSAtag-3-14C与HSA结合后，荧光增强（∽2000倍），并在近红外区发射。测定HSAtag-3-14C在25℃下的解离常数为17.8±2.6 μM，检出限为0.28±0.01 nM。此外，进行了MD模拟以研究HSAtag-3系列与HSA之间的相互作用。HSAtag-3-14C的结合主要由疏水相互作用驱动，由Leu115、Pro118和Ile142形成的非极性口袋为稳定脂肪链提供了有利的环境。相比之下，HSAtag-3的结合主要受静电相互作用支配。这些结果表明，延长烷基链长度是提高HSA结合亲和力的有效策略，这与它作为脂肪酸结合蛋白的作用是一致的。

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引用次数: 0

Spectroscopic and theoretical investigations of donor–π–acceptor–donor architectured cyclometalated iridium(III) and ruthenium(II) complexes in photocatalytic hydrogen generation 光催化制氢中给体- π -受体-给体结构环金属化铱（III）和钌（II）配合物的光谱和理论研究

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-29 DOI: 10.1016/j.dyepig.2025.113533

Xiao Yao , Yudong Wen , Linyu Fan , Zesheng Zhang , Silong Li , Zhuwu Jiang , Jinfeng Chen , Cheuk-Lam Ho , Mingqiang Kang

Unlocking the full potential of solar-driven hydrogen production hinges on the development of next-generation photosensitizers that combine efficiency, stability, and environmental compatibility. Here, we introduce a new class of cyclometalated iridium(III) and ruthenium(II) complex-es, meticulously engineered with a donor–π–acceptor–donor (D–π–A–D) molecular framework. By integrating triphenylamine-based donor motifs and extended π-conjugation, alongside strategically tailored anchoring groups, these complexes transcend conventional photosensitizer de-sign—enabling high light-harvesting capabilities, robust interfacial coupling with TiO₂, and accelerated charge separation dynamics. Advanced spectroscopic, electrochemical, and DFT investigations reveal that the D–π–A–D architecture not only amplifies visible-light absorption but also facilitates efficient electron injection into semiconductor interfaces. Notably, iridium(III) complexes equipped with phosphonate anchors achieve a maximum turnover number (TON) of 19,182 for photocatalytic hydrogen evolution under blue LED illumination. Beyond efficiency, these photosensitizers exhibit remarkable operational durability and minimal ecological impact, charting a path toward scalable, sustainable hydrogen generation. These findings underscore the considerable potential of D–π–A–D cyclometalated metal complexes, equipped with optimized anchoring groups, to function as robust photosensitizers for sustainable solar-driven hydrogen production.

释放太阳能驱动制氢的全部潜力取决于下一代光敏剂的发展，这种光敏剂结合了效率、稳定性和环境兼容性。在这里，我们介绍了一类新的环金属化铱（III）和钌（II）配合物，精心设计了一个供体- π -受体-供体（D -π-A-D）分子框架。通过整合基于三苯胺的给体基序和扩展π共轭，以及精心定制的锚定基团，这些配合物超越了传统的光敏剂设计，实现了高光收集能力，与TiO2的强大界面耦合，加速了电荷分离动力学。先进的光谱、电化学和DFT研究表明，D -π-A-D结构不仅可以放大可见光吸收，还可以促进半导体界面的有效电子注入。值得注意的是，在蓝色LED照明下，配备磷酸盐锚点的铱（III）配合物的光催化析氢的最大周转量（TON）为19,182。除了效率之外，这些光敏剂还表现出卓越的操作耐久性和最小的生态影响，为可扩展、可持续的制氢指明了道路。这些发现强调了具有优化锚定基团的D -π-A-D环金属化金属配合物作为可持续太阳能驱动制氢的强大光敏剂的巨大潜力。

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引用次数: 0

Promoting DNA alkylation of hypoxia-activated molecular prodrug for cooperative precision photodynamic-chemotherapy 促进缺氧激活分子前体药物DNA烷基化的协同精确光动力化疗

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-29 DOI: 10.1016/j.dyepig.2025.113532

Yang Zou , Xinmeng Yu , Manqing Wu , Shuang E , Yang Xuan , Yinan Zhao , Jiangli Fan , Shubiao Zhang

The combination of photodynamic therapy (PDT) and chemotherapy is a promising strategy to improve the effect of tumor treatment. However, the existing construction systems have insufficient killing selectivity and unclear synergistic mechanism. Herein, we developed a novel anticancer strategy based on a hypoxia-activated molecular prodrug (Cy-NM), which was formed by the covalent connection of an alkylating agent (NM) and a photodynamic photosensitizer (Cy-NH₂), to achieve cooperative precision photodynamic-chemotherapy. Cy-NM with positive charge could structure-inherent targeting (SIT) to tumors and localized to the mitochondria of cancer cells. Under the action of azo reductase, Cy-NM was converted into Cy-NH₂, thereby enhancing the photodynamic effect through the intramolecular charge transfer (ICT) effect and releasing NM. PDT consumed oxygen to further exacerbate tumor hypoxia and promote drug release, while the released drugs enhanced the photodynamic damage to mitochondria. The two treatments exhibited a synergistic promotion effect, achieving more effective and selective in killing cancer cells. Moreover, the fluorescence of Cy-NM changed from “off” to “on” after activation, which realized precise fluorescence diagnosis and visual treatment of tumors. Therefore, this prodrug design strategy offers a new perspective for improving the accuracy and efficiency of tumor treatment.

光动力疗法（PDT）与化疗相结合是提高肿瘤治疗效果的一种有前景的策略。然而，现有的构建体系杀灭选择性不足，协同机制不明确。在此，我们开发了一种新的基于缺氧激活的分子前药（Cy-NM）的抗癌策略，该策略是由烷基化剂（NM）和光动力光敏剂（Cy-NH2）的共价连接形成的，以实现协同精确光动力化疗。带正电荷的Cy-NM具有结构固有靶向肿瘤的功能，定位于癌细胞的线粒体。在偶氮还原酶的作用下，Cy-NM被转化为Cy-NH2，从而通过分子内电荷转移（ICT）效应增强光动力效应，释放NM。PDT消耗氧气，进一步加剧肿瘤缺氧，促进药物释放，而释放的药物则增强了对线粒体的光动力损伤。两种治疗方法表现出协同促进作用，对癌细胞的杀伤更有效、选择性更强。并且Cy-NM激活后荧光由“灭”变为“亮”，实现了肿瘤的精确荧光诊断和视觉治疗。因此，这种前药设计策略为提高肿瘤治疗的准确性和效率提供了新的视角。

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引用次数: 0

Breaking the lifetime-efficiency trade-off in blue organic room-temperature phosphorescence through site-directed boronate engineering 通过定点硼酸工程打破蓝色有机室温磷光的寿命效率权衡

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-29 DOI: 10.1016/j.dyepig.2025.113534

Dong Ding , Xinyue Xu , Jing Lv , Feng Li , Deyu Liu , Erkin Zakhidov , Mingliang Sun

Organic room-temperature phosphorescent (RTP) materials with tunable lifetimes are of great interest for information display, anti-counterfeiting, and data storage. However, achieving both ultralong lifetimes and high quantum yields, particularly in the blue region, remains challenging due to their inherent trade-off. Herein, a site-dictated strategy is employed by introducing pinacol boronate ester (Bpin) groups at the 1-, 2-, and 4-positions of a carbazole scaffold (CZ1B, CZ2B, and CZ4B), and embedding the resulting phosphors into a poly(vinyl alcohol) (PVA) matrix. All three emitters exhibit visible blue RTP with tunable lifetimes ranging from 3.96 s (CZ1B) to 5.20 s (CZ2B)—among the longest reported—along with high phosphorescence quantum yields (17.94–26.95 %). Combined theoretical and experimental studies reveal that Bpin substitution site affects excited-state characteristics, spin–orbit coupling, and hydrogen-bonding interactions with the PVA host. Notably, CZ2B shows optimal excited-state separation, highest surface electrostatic potential, and strongest hydrogen bonding, leading to superior RTP performance. This study presents a precise structural approach to modulate both phosphorescence lifetime and efficiency, offering valuable insight for the development of long-lived blue RTP materials in advanced optical applications such as data storage and visual encryption.

具有可调寿命的有机室温磷光（RTP）材料在信息显示、防伪和数据存储方面具有重要意义。然而，实现超长寿命和高量子产率，特别是在蓝色区域，由于它们固有的权衡，仍然具有挑战性。本文采用位点决定策略，在咔唑支架（CZ1B、CZ2B和CZ4B）的1-、2-和4-位置上引入吡纳酚硼酸酯（Bpin）基团，并将所得荧光粉嵌入聚乙烯醇（PVA）基质中。所有三种发射体都显示出可见的蓝色RTP，其可调寿命范围从3.96 s （CZ1B）到5.20 s (CZ2B) -在报道的最长寿命中-以及高磷光量子产率（17.94 - 26.95%）。理论和实验相结合的研究表明，Bpin取代位点影响了PVA宿主的激发态特性、自旋轨道耦合以及与PVA宿主的氢键相互作用。值得注意的是，CZ2B具有最佳的激发态分离、最高的表面静电势和最强的氢键，从而具有优异的RTP性能。本研究提出了一种精确的结构方法来调节磷光寿命和效率，为在数据存储和视觉加密等先进光学应用中开发长寿命蓝色RTP材料提供了有价值的见解。

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引用次数: 0

Colorimetric and fluorometric Seleno-BODIPY sensor for selective palladium detection in solution and on a cotton swab platform 比色和荧光硒- bodipy传感器选择性钯检测在溶液和棉签平台

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2025-12-29 DOI: 10.1016/j.dyepig.2025.113530

Beatriz S. Cugnasca , Ana Beatriz R. Guimarães , César A.G. Dantas , Francisco W.M. Ribeiro , Milene Hornink , Iolanda M. Cuccovia , Hélio A. Stefani , Ataualpa A.C. Braga , Thiago C. Correra , Carlos Lodeiro , Alcindo A. Dos Santos

The fluorescent sensor based on Seleno-BODIPY (BDP-Se) was explored for the detection of palladium in samples of industrial and environmental interest. Colorimetric and fluorometric analyses were conducted, and the sensor demonstrated high selectivity for Pd²⁺ relative to 21 other cations, as well as high sensitivity (LOD = 0.31 μmol/L by fluorescence) in a turn-on fluorescence process. Quantification of Pd²⁺ in aliquots from palladium-catalyzed coupling reaction media yielded satisfactory recovery values (up to 87 %). This demonstrates the sensor's applicability and good accuracy for Pd²⁺ detection in industrial organic environments, avoiding the need for sophisticated sample preparation methods. The structures of the products obtained from the reaction of BDP-Se with PdCl₂ (BDP-Se/PdCl₂) or PdBr₂ (BDP-Se/PdBr₂) were characterized by mass analysis, confirming the insertion of the “PdCl” or “PdBr” fragment, respectively, into the BODIPY structure via oxidative addition. Theoretical DFT calculations were performed to demonstrate the stability of the proposed structure, and the theoretical absorption spectrum corroborated the experimental results. Furthermore, BDP-Se was incorporated into a novel cotton swab-based device for palladium detection in aqueous solutions (with up to 60 % water), demonstrating its applicability in the solid state.

基于硒- bodipy （BDP-Se）的荧光传感器用于工业和环境样品中钯的检测。比色和荧光分析表明，该传感器在开启荧光过程中对Pd2+具有较高的选择性（相对于其他21种阳离子），灵敏度高（荧光LOD = 0.31 μmol/L）。定量分析钯催化偶联反应介质等分液中Pd2+的回收率（高达87%）令人满意。这证明了该传感器在工业有机环境中对Pd2+检测的适用性和良好的准确性，避免了对复杂的样品制备方法的需要。BDP-Se与PdCl2 （BDP-Se/PdCl2）或PdBr2 （BDP-Se/PdBr2）反应产物的结构通过质谱分析进行了表征，证实了“PdCl”或“PdBr”片段分别通过氧化加成插入到BODIPY结构中。理论DFT计算证明了所提出结构的稳定性，理论吸收光谱证实了实验结果。此外，BDP-Se被整合到一种新型的基于棉签的设备中，用于在水溶液（含高达60%的水）中检测钯，证明了其在固态中的适用性。

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