Pub Date : 2025-12-16DOI: 10.1016/j.dyepig.2025.113506
Xue Yu , Hui Wang , Dan Wang , Yunong Huang , Ding Zhou , Li Fan , Yuewei Zhang
Monitoring pH variations within living organisms is critically important. In this study, we report a novel dual-excitation ratiometric near-infrared (NIR) fluorescent probe (BNClBi–N), which employs hemicyanine dye as the fluorophore. BNClBi–N exhibits a response to pH changes through the protonation and deprotonation of nitrogen atoms on the benzoindole moiety, as confirmed by NMR studies. This protonation modulates the intramolecular charge transfer (ICT) process, causing a significant ratiometric fluorescence emission shift (I700nm/I610nm) with a pKa value of 3.46. Additionally, the fluorescent color transitioned from green to yellow within the pH range of 6.0 to 2.0. Additionally, the probe demonstrated good stability and anti-interference capability. Building on these outstanding characteristics, BNClBi–N enabled reliable monitoring exogenous pH in live cells and zebrafish with excellent lysosomal targeting ability.
{"title":"A novel ratiometric NIR fluorescent probe for pH monitoring in live cells and zebrafish","authors":"Xue Yu , Hui Wang , Dan Wang , Yunong Huang , Ding Zhou , Li Fan , Yuewei Zhang","doi":"10.1016/j.dyepig.2025.113506","DOIUrl":"10.1016/j.dyepig.2025.113506","url":null,"abstract":"<div><div>Monitoring pH variations within living organisms is critically important. In this study, we report a novel dual-excitation ratiometric near-infrared (NIR) fluorescent probe (<strong>BNClBi–N</strong>), which employs hemicyanine dye as the fluorophore. <strong>BNClBi–N</strong> exhibits a response to pH changes through the protonation and deprotonation of nitrogen atoms on the benzoindole moiety, as confirmed by NMR studies. This protonation modulates the intramolecular charge transfer (ICT) process, causing a significant ratiometric fluorescence emission shift (<em>I</em><sub><em>700</em></sub> <sub><em>nm</em></sub>/<em>I</em><sub><em>610</em></sub> <sub><em>nm</em></sub>) with a pKa value of 3.46. Additionally, the fluorescent color transitioned from green to yellow within the pH range of 6.0 to 2.0. Additionally, the probe demonstrated good stability and anti-interference capability. Building on these outstanding characteristics, <strong>BNClBi–N</strong> enabled reliable monitoring exogenous pH in live cells and zebrafish with excellent lysosomal targeting ability.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113506"},"PeriodicalIF":4.2,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797281","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}
Pub Date : 2025-12-16DOI: 10.1016/j.dyepig.2025.113505
Bo Lin , Chunxia Liu , Kunyi Zhao , Wenjing Lu , Huan Liu , Chuan Dong , Li Fan
Ferroptosis based on lysosomal lipid peroxidation paves the way for utilizing this pathway as a therapeutic target in photodynamic therapy (PDT). Herein, we constructed an iodine-substituted sulfur-containing lipophilic cationic photosensitizer 2-(2-(5-(4-(di-p-tolylamino)phenyl)thiophen-2-yl)vinyl)-3-ethyl-6-iodobenzo [d]thiazol-3-ium iodide (TTIT) with lysosome-targeting for photoablation of cancer cells. The near infrared (NIR) fluorescence and reactive oxygen species (ROS) generation capacity of TTIT can be specifically activated by low-polarity or high-viscosity environments. Interestingly, the controllable photobleaching behavior of TTIT can prevent excessive phototherapy caused by superfluous light dose. This work confirms that lipid peroxidation-induced lysosomal disruption is a viable strategy for tumor therapy and provides a new photosensitizer that merges high ROS production with self-regulated safety.
{"title":"Photosensitizer with near-infrared emission employing lysosome as therapeutic target for cancer cell ablation","authors":"Bo Lin , Chunxia Liu , Kunyi Zhao , Wenjing Lu , Huan Liu , Chuan Dong , Li Fan","doi":"10.1016/j.dyepig.2025.113505","DOIUrl":"10.1016/j.dyepig.2025.113505","url":null,"abstract":"<div><div>Ferroptosis based on lysosomal lipid peroxidation paves the way for utilizing this pathway as a therapeutic target in photodynamic therapy (PDT). Herein, we constructed an iodine-substituted sulfur-containing lipophilic cationic photosensitizer 2-(2-(5-(4-(di-p-tolylamino)phenyl)thiophen-2-yl)vinyl)-3-ethyl-6-iodobenzo [d]thiazol-3-ium iodide (TTIT) with lysosome-targeting for photoablation of cancer cells. The near infrared (NIR) fluorescence and reactive oxygen species (ROS) generation capacity of TTIT can be specifically activated by low-polarity or high-viscosity environments. Interestingly, the controllable photobleaching behavior of TTIT can prevent excessive phototherapy caused by superfluous light dose. This work confirms that lipid peroxidation-induced lysosomal disruption is a viable strategy for tumor therapy and provides a new photosensitizer that merges high ROS production with self-regulated safety.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113505"},"PeriodicalIF":4.2,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797607","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}
Pub Date : 2025-12-16DOI: 10.1016/j.dyepig.2025.113502
Zhongxin Zhou , Jun Yang , Shujing Jin , Yongtao zhao , Changheng Guan , Hongjun Wang , Weiguo Zhu , Yu Liu
The ternary strategy, which introduces a third component into the binary system, is a simple and effective method for boosting power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, a novel non-fused-ring small molecule acceptor (NFR-SMA), namely DFTQA-2Cl, featuring a medium bandgap and high planarity, was designed and synthesized through a synergistic strategy combining terminal chlorination and an isomeric thiophene π-bridge. The introduction of DFTQA-2Cl into the D18:Y6 binary system creates a ternary blend with complementary absorptions and cascaded energy alignment, which accelerates exciton dissociation, enhances charge collection, and boosts current density for in high-performance OSCs. Simultaneously, doping modulation via DFTQA-2Cl optimizes the micromorphology and phase separation size of active layer. Based on this, the optimized ternary OSC based on D18:Y6:DFTQA-2Cl achieved a notable PCE of 18.04 %, a 6.68 % enhancement over the 16.91 % of its binary D18:Y6 system, along with simultaneous enhancements in other parameters. Additionally, the ternary OSCs achieved a T80 operational stability of over 1500 h. This work illustrates that incorporating a medium-bandgap NFR-SMA with good planarity as a third component in a binary system effectively enhance the basic parameters of ternary OSCs.
{"title":"Synergistic end-group chlorination and isomeric thiophene π-bridge strategies achieve near-perfect planarity in non-fused-ring acceptors for efficient organic solar cells","authors":"Zhongxin Zhou , Jun Yang , Shujing Jin , Yongtao zhao , Changheng Guan , Hongjun Wang , Weiguo Zhu , Yu Liu","doi":"10.1016/j.dyepig.2025.113502","DOIUrl":"10.1016/j.dyepig.2025.113502","url":null,"abstract":"<div><div>The ternary strategy, which introduces a third component into the binary system, is a simple and effective method for boosting power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, a novel non-fused-ring small molecule acceptor (NFR-SMA), namely DFTQA-2Cl, featuring a medium bandgap and high planarity, was designed and synthesized through a synergistic strategy combining terminal chlorination and an isomeric thiophene π-bridge. The introduction of DFTQA-2Cl into the D18:Y6 binary system creates a ternary blend with complementary absorptions and cascaded energy alignment, which accelerates exciton dissociation, enhances charge collection, and boosts current density for in high-performance OSCs. Simultaneously, doping modulation via DFTQA-2Cl optimizes the micromorphology and phase separation size of active layer. Based on this, the optimized ternary OSC based on D18:Y6:DFTQA-2Cl achieved a notable PCE of 18.04 %, a 6.68 % enhancement over the 16.91 % of its binary D18:Y6 system, along with simultaneous enhancements in other parameters. Additionally, the ternary OSCs achieved a T80 operational stability of over 1500 h. This work illustrates that incorporating a medium-bandgap NFR-SMA with good planarity as a third component in a binary system effectively enhance the basic parameters of ternary OSCs.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113502"},"PeriodicalIF":4.2,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797279","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}
Pub Date : 2025-12-16DOI: 10.1016/j.dyepig.2025.113507
Maciej Spiegel
A computational methodology is presented for the rational design of anthraquinone-based, heavy-atom–free photosensitisers optimised for two-photon photodynamic therapy in hypoxic tumours within the NIR region. Twelve derivatives were evaluated for two-photon absorption, excited states dynamics, redox reactivity, and ADME properties. Four lead compounds—Oxz, Tdz, Prd, and Pmd—exhibited Herzberg–Teller-enabled intersystem crossing and sufficient triplet-state lifetimes to permit diffusion-limited interactions. The Redox Activity and Chemical Trends Map, validated against Marcus theory, distinguished distinct mechanistic profiles amongst the derivatives, with lead candidates exhibiting selective biomolecular oxidation (Type III). Notably, Pmd retained a reasonable phosphorescence rate despite concurrent processes, indicating likelihood of the sustained Type II reactivity under quenching. SwissADME analysis confirmed favourable permeability and synthetic accessibility. This integrative computational framework—though developed for anthraquinones—is generalisable to diverse scaffolds, facilitating early-stage prioritisation of oxygen-independent, multimodal two–photon PDT candidates for hypoxic cancer treatment.
提出了一种计算方法，用于合理设计基于蒽醌的无重原子光敏剂，该光敏剂优化用于近红外区域内缺氧肿瘤的双光子光动力治疗。对12种衍生物的双光子吸收、激发态动力学、氧化还原反应性和ADME性能进行了评价。四种先导化合物oxz， Tdz， Prd和pmd表现出赫茨伯格-泰勒系统间交叉和足够的三重态寿命，以允许扩散限制相互作用。氧化还原活性和化学趋势图（Redox Activity and Chemical Trends Map）根据Marcus理论进行了验证，在衍生物中区分出不同的机制特征，主要候选衍生物表现出选择性生物分子氧化（III型）。值得注意的是，Pmd保持了合理的磷光率，尽管有并发的过程，这表明在淬火下可能持续II型反应性。SwissADME分析证实了良好的渗透率和合成可达性。这种综合计算框架虽然是为蒽醌类开发的，但可推广到不同的支架，促进缺氧癌症治疗中不依赖氧的多模态双光子PDT候选物的早期优先排序。
{"title":"In silico design of anthraquinone-based two-photon photosensitisers for NIR-activated photodynamic therapy in hypoxic tumors","authors":"Maciej Spiegel","doi":"10.1016/j.dyepig.2025.113507","DOIUrl":"10.1016/j.dyepig.2025.113507","url":null,"abstract":"<div><div>A computational methodology is presented for the rational design of anthraquinone-based, heavy-atom–free photosensitisers optimised for two-photon photodynamic therapy in hypoxic tumours within the NIR region. Twelve derivatives were evaluated for two-photon absorption, excited states dynamics, redox reactivity, and ADME properties. Four lead compounds—<strong>Oxz</strong>, <strong>Tdz</strong>, <strong>Prd</strong>, and <strong>Pmd</strong>—exhibited Herzberg–Teller-enabled intersystem crossing and sufficient triplet-state lifetimes to permit diffusion-limited interactions. The Redox Activity and Chemical Trends Map, validated against Marcus theory, distinguished distinct mechanistic profiles amongst the derivatives, with lead candidates exhibiting selective biomolecular oxidation (Type III). Notably, <strong>Pmd</strong> retained a reasonable phosphorescence rate despite concurrent processes, indicating likelihood of the sustained Type II reactivity under quenching. SwissADME analysis confirmed favourable permeability and synthetic accessibility. This integrative computational framework—though developed for anthraquinones—is generalisable to diverse scaffolds, facilitating early-stage prioritisation of oxygen-independent, multimodal two–photon PDT candidates for hypoxic cancer treatment.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"248 ","pages":"Article 113507"},"PeriodicalIF":4.2,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145847711","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}
Pub Date : 2025-12-13DOI: 10.1016/j.dyepig.2025.113501
Yuping Wu , Xiangbo Yang , Wei Sun , Qianting Wang , Rong Zhang , Fengjuan Yang , Zongli Xie
Addressing the dual challenges of water scarcity and energy demands, solar-driven evaporation systems necessitate breakthroughs in photothermal conversion. However, current technologies encounter inherent limitations to balance efficient light absorption and water transport. Here, we introduces a biomimetic rubus-like architecture comprising hydrothermal carbon (HTC) and a cactus-like BiOI/ZnO composite. The HTC provides broadband solar absorption, while the cactus-like BiOI/ZnO enables efficient light trapping via multi-reflection and established the p-n heterojunction for accelerated charge separation. In addition, the engineered micro-nano rough surface with abundant hydroxyl groups and hydrogen-bonding networks promotes rapid water uptake, transport and evaporation. Benefiting from these synergistic features, the system achieves an outstanding evaporation rate of 6.24 kg·m−2·h−1 and photocatalytic degradation (C/C0) of 30.1 % and rate constants (k) of 0.0185 min−1 under 2.0 sun irradiation. This multifunction design maximizes solar harvesting while preserves catalytically active surface sites, making a significant step towards sustainable solar evaporator technology for integrated water treatment solutions.
{"title":"Rubus-/Cactus-bioinspired HTC@BiOI/ZnO hierarchical composites for enhanced solar water evaporation, photocatalysis and desalination","authors":"Yuping Wu , Xiangbo Yang , Wei Sun , Qianting Wang , Rong Zhang , Fengjuan Yang , Zongli Xie","doi":"10.1016/j.dyepig.2025.113501","DOIUrl":"10.1016/j.dyepig.2025.113501","url":null,"abstract":"<div><div>Addressing the dual challenges of water scarcity and energy demands, solar-driven evaporation systems necessitate breakthroughs in photothermal conversion. However, current technologies encounter inherent limitations to balance efficient light absorption and water transport. Here, we introduces a biomimetic rubus-like architecture comprising hydrothermal carbon (HTC) and a cactus-like BiOI/ZnO composite. The HTC provides broadband solar absorption, while the cactus-like BiOI/ZnO enables efficient light trapping via multi-reflection and established the p-n heterojunction for accelerated charge separation. In addition, the engineered micro-nano rough surface with abundant hydroxyl groups and hydrogen-bonding networks promotes rapid water uptake, transport and evaporation. Benefiting from these synergistic features, the system achieves an outstanding evaporation rate of 6.24 kg·m<sup>−2</sup>·h<sup>−1</sup> and photocatalytic degradation (C/C<sub>0</sub>) of 30.1 % and rate constants (k) of 0.0185 min<sup>−1</sup> under 2.0 sun irradiation. This multifunction design maximizes solar harvesting while preserves catalytically active surface sites, making a significant step towards sustainable solar evaporator technology for integrated water treatment solutions.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113501"},"PeriodicalIF":4.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797272","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}
Conventional two-bath dyeing for nylon 66/cotton blends faces challenges including high resource consumption, limited lightfastness, and unsatisfactory color uniformity. This study develops a sustainable one-bath alternative employing a temperature-responsive pH buffer system, T7 (Tris and Tris-HCl), which enables an autonomous pH transition from alkaline (60 °C) to near-neutral (90 °C) through thermally induced hydrogen bond dissociation. This intelligent pH-switching capability permits sequential fixation of reactive dyes on cotton and neutral dyes on nylon 66 within a single bath. Integrated with stain-resistant pretreatment, optimized dye selection, and nano-ZnO photostabilization, the process demonstrates enhanced lightfastness (Grade 6–7) and improved color uniformity (S value reduced to 0.45). Furthermore, it achieves significant sustainability benefits, with reductions of 31.06 % in energy use, 25.54 % in processing time, 31.33 % in CO2 emissions, and 25.13 % in overall cost compared to conventional two-bath dyeing. The T7-mediated strategy effectively resolves the inherent pH incompatibility in blended fiber dyeing, providing a viable pathway toward eco-friendly textile production.
{"title":"Temperature-responsive pH buffer T7 enables sustainable one-bath dyeing of nylon 66/cotton blends with improved lightfastness","authors":"Kangkang Wang, Qiaoyuan Zhen, Tianyu Guo, Xinxin Li, Xiaohong Qin","doi":"10.1016/j.dyepig.2025.113479","DOIUrl":"10.1016/j.dyepig.2025.113479","url":null,"abstract":"<div><div>Conventional two-bath dyeing for nylon 66/cotton blends faces challenges including high resource consumption, limited lightfastness, and unsatisfactory color uniformity. This study develops a sustainable one-bath alternative employing a temperature-responsive pH buffer system, T7 (Tris and Tris-HCl), which enables an autonomous pH transition from alkaline (60 °C) to near-neutral (90 °C) through thermally induced hydrogen bond dissociation. This intelligent pH-switching capability permits sequential fixation of reactive dyes on cotton and neutral dyes on nylon 66 within a single bath. Integrated with stain-resistant pretreatment, optimized dye selection, and nano-ZnO photostabilization, the process demonstrates enhanced lightfastness (Grade 6–7) and improved color uniformity (S value reduced to 0.45). Furthermore, it achieves significant sustainability benefits, with reductions of 31.06 % in energy use, 25.54 % in processing time, 31.33 % in CO<sub>2</sub> emissions, and 25.13 % in overall cost compared to conventional two-bath dyeing. The T7-mediated strategy effectively resolves the inherent pH incompatibility in blended fiber dyeing, providing a viable pathway toward eco-friendly textile production.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113479"},"PeriodicalIF":4.2,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797609","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}
Pub Date : 2025-12-12DOI: 10.1016/j.dyepig.2025.113499
Tong Shen , Tian-Yu Liu , Yun-Jie Cai , Yun-Han Wu , Ze-Zhong Lin , Gui-Ying Zhu , Chong Wang , Rong-Chao Xue
Organic room-temperature phosphorescent (RTP) materials are attractive for anti-counterfeiting, information encryption, and bioimaging, but their luminescence is typically rapidly quenched under humid or aqueous conditions. Conventional polymer hosts such as Poly(methyl methacrylate) (PMMA) and Poly(vinyl alcohol) (PVA) lose both fluorescence and phosphorescence within days of exposure to high humidity or water immersion, limiting their practical applications. Here, we present a water-resistant, reversible RTP platform based on methacrylate-vinylidene chloride (MA VDC) composites with organic dyes. Distinct from conventional matrices, MA-VDC forms a dense network stabilised by intrinsic hydrogen bonding and symmetrically arranged chlorine atoms, providing superior oxygen and moisture barrier properties. This structural advantage protects triplet excitons, maintaining stable fluorescence even under prolonged exposure to high humidity or boiling water treatment, and phosphorescence can be fully restored after drying. The demonstrated robustness and reversibility highlight MA VDC as a unique polymer host for next-generation secure optical encryption and anti-counterfeiting technologies.
{"title":"Organic room-temperature phosphorescent materials with excellent water stability achieved via methacrylate-vinylidene chloride","authors":"Tong Shen , Tian-Yu Liu , Yun-Jie Cai , Yun-Han Wu , Ze-Zhong Lin , Gui-Ying Zhu , Chong Wang , Rong-Chao Xue","doi":"10.1016/j.dyepig.2025.113499","DOIUrl":"10.1016/j.dyepig.2025.113499","url":null,"abstract":"<div><div>Organic room-temperature phosphorescent (RTP) materials are attractive for anti-counterfeiting, information encryption, and bioimaging, but their luminescence is typically rapidly quenched under humid or aqueous conditions. Conventional polymer hosts such as Poly(methyl methacrylate) (PMMA) and Poly(vinyl alcohol) (PVA) lose both fluorescence and phosphorescence within days of exposure to high humidity or water immersion, limiting their practical applications. Here, we present a water-resistant, reversible RTP platform based on methacrylate-vinylidene chloride (MA VDC) composites with organic dyes. Distinct from conventional matrices, MA-VDC forms a dense network stabilised by intrinsic hydrogen bonding and symmetrically arranged chlorine atoms, providing superior oxygen and moisture barrier properties. This structural advantage protects triplet excitons, maintaining stable fluorescence even under prolonged exposure to high humidity or boiling water treatment, and phosphorescence can be fully restored after drying. The demonstrated robustness and reversibility highlight MA VDC as a unique polymer host for next-generation secure optical encryption and anti-counterfeiting technologies.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113499"},"PeriodicalIF":4.2,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797278","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}
Pub Date : 2025-12-12DOI: 10.1016/j.dyepig.2025.113500
Changbeom Jeon , Jung-Eun Lee , Minjung Han , Woong Kwon , Hyejin Ju , Dong-Je Lee , Jihyun Kim , Jong Sung Won , Soo Bin Bae , Euigyung Jeong , Han Gi Chae
This study explores the templating role of organic nanocrystals, specifically 2,9-dimethylquinacridone (PR), in enhancing the mechanical performance of polyacrylonitrile (PAN)-derived carbon fibers. By incorporating PR—structurally analogous to the acridone units formed during PAN stabilization—into the PAN matrix, we investigate how these nanofillers direct the crystalline evolution and reinforce the resulting carbon fibers. PAN/PR nanocomposite fibers were prepared by dry-jet wet spinning, followed by stabilization and carbonization. Microstructural analysis reveals that well-dispersed PR nanocrystals serve as efficient nucleation sites, catalyzing the development of ordered carbon crystalline domains during heat treatment. As a result, carbon fibers containing 1 wt% PR displayed a pronounced increase in tensile strength and modulus (16 % and 13 % higher, respectively, than control samples), attributed to optimal PAN-PR interaction and effective templating effects. These findings demonstrate that the templating behavior of organic crystalline nanofillers can be harnessed to simultaneously promote carbon crystal growth and reinforce mechanical properties in PAN-based carbon fibers. Our results highlight an efficient approach to nanofiller incorporation, establishing 2,9-dimethylquinacridone as a promising, non-polymeric reinforcement for next-generation high-performance carbon fibers.
{"title":"Templating effect of 2,9-dimethylquinacridone nanocrystals on structural evolution and mechanical properties of polyacrylonitrile-based carbon fibers","authors":"Changbeom Jeon , Jung-Eun Lee , Minjung Han , Woong Kwon , Hyejin Ju , Dong-Je Lee , Jihyun Kim , Jong Sung Won , Soo Bin Bae , Euigyung Jeong , Han Gi Chae","doi":"10.1016/j.dyepig.2025.113500","DOIUrl":"10.1016/j.dyepig.2025.113500","url":null,"abstract":"<div><div>This study explores the templating role of organic nanocrystals, specifically 2,9-dimethylquinacridone (PR), in enhancing the mechanical performance of polyacrylonitrile (PAN)-derived carbon fibers. By incorporating PR—structurally analogous to the acridone units formed during PAN stabilization—into the PAN matrix, we investigate how these nanofillers direct the crystalline evolution and reinforce the resulting carbon fibers. PAN/PR nanocomposite fibers were prepared by dry-jet wet spinning, followed by stabilization and carbonization. Microstructural analysis reveals that well-dispersed PR nanocrystals serve as efficient nucleation sites, catalyzing the development of ordered carbon crystalline domains during heat treatment. As a result, carbon fibers containing 1 wt% PR displayed a pronounced increase in tensile strength and modulus (16 % and 13 % higher, respectively, than control samples), attributed to optimal PAN-PR interaction and effective templating effects. These findings demonstrate that the templating behavior of organic crystalline nanofillers can be harnessed to simultaneously promote carbon crystal growth and reinforce mechanical properties in PAN-based carbon fibers. Our results highlight an efficient approach to nanofiller incorporation, establishing 2,9-dimethylquinacridone as a promising, non-polymeric reinforcement for next-generation high-performance carbon fibers.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113500"},"PeriodicalIF":4.2,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797277","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}
Pub Date : 2025-12-11DOI: 10.1016/j.dyepig.2025.113495
Sakshi Saini, Jagram Meena
Tamarind kernel powder and its derivatives exhibit significant potential for several applications, ranging from electrochemical appliances to antimicrobial agents. Although promising, modifying tamarind with dye molecules to improve its antioxidant and electrochemical properties has been unexplored. To bridge this gap, we synthesized Indosulfoxyl tamarind kernel powder (ITKP) biocomposites at varying concentrations and evaluated their antioxidant activity using 2,2-Diphenyl-1-Picryl-Hydrazyl-Hydrate (DPPH) and H2O2 free radicals. This investigation has revealed that the antioxidant efficiency of ITKP is dose-dependent and increases with the concentration of the indigotine molecule, reaching up to 83 % and 96 % with IC50 values of 285 μg/ml and 305 μg/ml, respectively, as determined by the DPPH and H2O2 assays. Real-time investigation of the oxidation behaviour of ITKP biocomposites by cyclic voltammetry revealed that ITKP-4 (40 %) demonstrated a superior anodic peak (5.8 μA) compared to ITKP-1 (10 %) (2.8 μA), indicating enhanced electron transfer following radical scavenging, thereby boosting its antioxidant efficiency. The electroactive surface area of the modified glassy carbon electrode with ITKP biocomposites is estimated 0.045 cm2 to be 5 times greater than that of TKP/GCE, indicating the enhanced electrochemical availability of ITKP biocomposites. These findings provide a novel perspective on the antioxidant activity of TKP, aiding in the creation of safer materials and informing regulatory criteria for their biomedical applications.
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Pub Date : 2025-12-11DOI: 10.1016/j.dyepig.2025.113498
Yongjun Deng , Zhixiong Cao , Rong Luo , Xinru Chen, Zengrong Li, Chu Liu, Qi Liu, Shangqing Xiao, Lin Liu, Xuelong Huang
Semiconductor polymer-based photoacoustic imaging (PAI) holds significant clinical potential due to its non-invasive nature and high resolution, yet is limited by insufficient penetration depth and low signal-to-noise ratio (SNR). To overcome this challenge, enhancing photoacoustic efficiency through molecular engineering of contrast agents is essential. Notably, increasing the donor–acceptor (D–A) dihedral angle has proven effective in promoting non-radiative decay, thereby boosting photoacoustic performance. Here, we report a Y-axis conjugation extension strategy—via lateral functionalization at the bridgehead of the donor to sterically modulate the D–A conformation. With cyclopentadithiophene (CDT) as the donor unit, a vinylene bond was introduced at its bridgehead carbon to develop a planar donor, CDT-V. Subsequently, two NIR polymers—PCDT-V-DPP (with extension) and PCDT-DPP (control)—were synthesized via copolymerization with diketopyrrolopyrrole (DPP). Density functional theory (DFT) calculations reveal a larger D–A dihedral angle in PCDT-V-DPP, which exhibits a 1.82-fold higher SNR than PCDT-DPP in vitro. In vivo, PCDT-V-DPP@NPs enable clear resolution of 20-μm ear and 35-μm brain microvasculature in mice. This work establishes a donor-unit Y-axis conjugation extension approach for optimizing D–A geometry and non-radiative decay, offering a new avenue for high-performance photoacoustic contrast agents.
基于半导体聚合物的光声成像（PAI）因其非侵入性和高分辨率而具有重要的临床潜力，但受穿透深度不足和低信噪比（SNR）的限制。为了克服这一挑战，通过造影剂的分子工程来提高光声效率是必不可少的。值得注意的是，增加供体-受体（D-A）二面角已被证明可有效促进非辐射衰变，从而提高光声性能。在这里，我们报告了一种y轴共轭扩展策略-通过在供体桥头堡的横向功能化来立体调节D-A构象。以环戊二噻吩（CDT）为给体单元，在其桥头堡碳上引入乙烯键，形成平面给体CDT- v。随后，与二酮吡咯（DPP）共聚合成了两种近红外聚合物pcdt - v -DPP（带延伸）和PCDT-DPP（对照）。密度泛函理论（DFT）计算表明，PCDT-V-DPP具有更大的D-A二面角，其信噪比比PCDT-DPP高1.82倍。在小鼠体内，PCDT-V-DPP@NPs能够清晰地分辨20 μm的耳和35 μm的脑微血管。本工作建立了一种用于优化D-A几何形状和非辐射衰减的供体-单位y轴共轭扩展方法，为高性能光声造影剂提供了新的途径。
{"title":"Y-axis conjugation strategy for dihedral angle modulation enhances the photoacoustic performance of D–A type NIR polymers for high-resolution In vivo imaging","authors":"Yongjun Deng , Zhixiong Cao , Rong Luo , Xinru Chen, Zengrong Li, Chu Liu, Qi Liu, Shangqing Xiao, Lin Liu, Xuelong Huang","doi":"10.1016/j.dyepig.2025.113498","DOIUrl":"10.1016/j.dyepig.2025.113498","url":null,"abstract":"<div><div>Semiconductor polymer-based photoacoustic imaging (PAI) holds significant clinical potential due to its non-invasive nature and high resolution, yet is limited by insufficient penetration depth and low signal-to-noise ratio (SNR). To overcome this challenge, enhancing photoacoustic efficiency through molecular engineering of contrast agents is essential. Notably, increasing the donor–acceptor (D–A) dihedral angle has proven effective in promoting non-radiative decay, thereby boosting photoacoustic performance. Here, we report a Y-axis conjugation extension strategy—via lateral functionalization at the bridgehead of the donor to sterically modulate the D–A conformation. With cyclopentadithiophene (CDT) as the donor unit, a vinylene bond was introduced at its bridgehead carbon to develop a planar donor, CDT-V. Subsequently, two NIR polymers—PCDT-V-DPP (with extension) and PCDT-DPP (control)—were synthesized via copolymerization with diketopyrrolopyrrole (DPP). Density functional theory (DFT) calculations reveal a larger D–A dihedral angle in PCDT-V-DPP, which exhibits a 1.82-fold higher SNR than PCDT-DPP <em>in vitro. In vivo</em>, PCDT-V-DPP@NPs enable clear resolution of 20-μm ear and 35-μm brain microvasculature in mice. This work establishes a donor-unit Y-axis conjugation extension approach for optimizing D–A geometry and non-radiative decay, offering a new avenue for high-performance photoacoustic contrast agents.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"247 ","pages":"Article 113498"},"PeriodicalIF":4.2,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797276","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}
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