Dyes and Pigments最新文献_第3页

Chemically Anchored Black Phosphorus/Chromophore Composite Luminescent Materials towards Solid-State Photoluminescence and Electroluminescence 实现固态光致发光和电致发光的化学锚定黑磷/色团复合发光材料

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-28 DOI: 10.1016/j.dyepig.2024.112522

Yun Zhao , Junyu Zhang , Huilong Xu , Xijie Wang , Bolin Zhao , Baohua Zhang , Zhonghai Ni , Guoling Li , Yuwei Zhang

As a promising two-dimensional (2D) material, black phosphorus (BP) has gained great attention because of its intrinsic physicochemical characteristics. However, BP is easy to be oxidized and form various surface defects, which decreases the charge transport and makes luminescence difficult. Herein, we report a facile strategy to synthesize chemically anchored BP/chromophore composite luminescent materials by integrating 2D BP nanosheets with boron dipyrromethene (BODIPY) dyes through simple sonication reactions. Solids of BP composite materials are brightly fluorescent with 5 orders of magnitude increase of photoluminescence intensity compared with the pure solids of BP and BODIPY. 2D BP nanosheets with large specific surface area and lone pair electrons facilitate chemisorption of BODIPY by forming covalent interactions between P and B/N atoms, which not only passivates the surface of BP and eliminates the oxidation, but also prevents the aggregation caused quenching (ACQ) issue of BODIPY. Furtherly, the organic light-emitting diodes (OLEDs) based on the BP/chromophore composite luminescent materials were first successfully achieved, the electroluminescence spectra of which cover the full spectrum of red, green, and blue visible light. This work provides a brand-new approach to further design and development of high mobility and high luminous efficiency composite luminescent materials and devices based on BP.

作为一种前景广阔的二维（2D）材料，黑磷（BP）因其固有的物理化学特性而备受关注。然而，黑磷容易被氧化并形成各种表面缺陷，从而降低了电荷传输能力并使发光变得困难。在此，我们报告了一种通过简单的超声反应将二维 BP 纳米片与硼二吡咯烷（BODIPY）染料整合在一起，从而合成化学锚定 BP/ 色素团复合发光材料的简便策略。BP 复合材料的固体具有明亮的荧光，与 BP 和 BODIPY 的纯固体相比，光致发光强度提高了 5 个数量级。具有大比表面积和孤对电子的二维 BP 纳米片通过 P 原子和 B/N 原子间的共价作用，促进了 BODIPY 的化学吸附，不仅使 BP 表面钝化，消除了氧化，还防止了 BODIPY 的聚集淬灭（ACQ）问题。此外，首次成功实现了基于 BP/色团复合发光材料的有机发光二极管（OLED），其电致发光光谱覆盖了红、绿、蓝可见光的全光谱。这项工作为进一步设计和开发基于 BP 的高迁移率和高发光效率复合发光材料和器件提供了一种全新的方法。

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引用次数: 0

Synthesis of novel reactive disperse dyes comprising α-phenyl diazo ester groups for polyurethane fiber dyeing 合成包含 α-苯基重氮酯基团的新型活性分散染料，用于聚氨酯纤维染色

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-28 DOI: 10.1016/j.dyepig.2024.112517

Xiaokang Xie, Lulu Shi, Hua Jiang, Ye Wang

A new molecular design of dyes comprising diazo groups was proposed to address the severe staining problem of polyurethane (PU) fibers dyed with disperse dyes. Nine reactive disperse dyes containing α-phenyl diazo ester as the reactive group were designed and synthesized, and their structures were characterized using nuclear magnetic resonance spectroscopy, high-resolution mass spectrometry, and infrared spectroscopy. The absorption and thermal properties of the nine dyes were also investigated. PU fibers were dyed with these dyes, and the corresponding dyeing and fixing processes were optimized. PU fibers treated using a simple heating process exhibited excellent fixation performance, which was confirmed through studying their fixation, migration, and fastness properties. PU fibers dyed with dyes containing one diazo group exhibited fixation values of 50.6%–75.8 %, which were considerably increased to 83.9%–92.9 % when dyes with two diazo groups were used. These high fixation values hindered the migration of the dye molecules, effectively reducing their staining on other fibers. Therefore, the dyed PU fibers exhibited excellent color fastnesses to soaping, rubbing, and sublimation. The reaction mechanism between the dye and fiber was proposed based on a model reaction experiment and theoretical analysis. The results indicated that the N–H bond of the PU macromolecule was the main reaction site, on which carbene intermediates reacted with the fiber through an insertion reaction.

为了解决用分散染料染色的聚氨酯（PU）纤维的严重染色问题，提出了一种新的包含重氮基团的染料分子设计。研究人员设计并合成了九种以 α-苯基重氮酯为活性基团的活性分散染料，并利用核磁共振光谱、高分辨质谱和红外光谱对其结构进行了表征。此外，还研究了这九种染料的吸收特性和热特性。用这些染料对聚氨酯纤维进行染色，并优化了相应的染色和固色工艺。使用简单加热工艺处理的聚氨酯纤维具有出色的固着性能，这一点通过研究其固着、迁移和牢度特性得到了证实。用含有一个重氮基团的染料染色的聚氨酯纤维的固色率为 50.6%-75.8 %，而当使用含有两个重氮基团的染料时，固色率大幅提高到 83.9%-92.9 %。这些高固着值阻碍了染料分子的迁移，有效减少了它们对其他纤维的染色。因此，染色聚氨酯纤维在皂洗、摩擦和升华方面都表现出优异的色牢度。根据模型反应实验和理论分析，提出了染料与纤维之间的反应机理。结果表明，聚氨酯大分子的 N-H 键是主要的反应位点，其上的碳烯中间体通过插入反应与纤维发生反应。

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引用次数: 0

Molecular Engineering of membrane structure targeted photosensitizers for antitumor photodynamic therapy 用于抗肿瘤光动力疗法的膜结构靶向光敏剂的分子工程学研究

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-26 DOI: 10.1016/j.dyepig.2024.112497

Xiaojuan Wang , Xin Liu , Wei Lu , Yuheng Ma , Xue Wang , Lufei Xiao , Zhangjun Hu , Zhengjie Liu , Yingzhong Zhu , Lin Kong

Photodynamic therapy (PDT) has been used to cure special diseases or the diseases that localized at special sites in comparison with conventional therapy, due to its high spatiotemporal selectivity, non-invasion, low drug resistance. However, vast majority of photosensitizers (PSs) still suffer from several limitations including poor aqueous solubility and poor photostability. Here, we used two strategies, promoting the intramolecular charge transfer and terminal modification, to overcome these limitations and enhance therapeutic effects. Three membrane-structure targeted molecules, 3CN-Np, 3CN–OH, and 3CN-QA, were designed and synthesized, which exhibited high extinction coefficient, excellent photostability and reactive oxygen species (ROS) productive capacity. In cell imaging, the designing molecules would stain endoplasmic reticulum for 3CN-Np and 3CN–OH, and cell membrane for 3CN-QA, respectively. Afterwards, we used white light (25 mW/cm²) to irradiate the probe cultured cells for 20 min, the ratio of the dead and live cells was 3.0 for 3CN-Np, 3.5 for 3CN–OH, and 3.7 for 3CN-QA. Based on the high cell apoptosis in vitro under a white-light, 3CN–OH was selected to inhibited tumor growth in vivo, and the tumor volume was reduced to 45 % with non-toxicity to vitals. The study provided new sights in developing PSs with high water-solubility, photostability, and ROS generating ability in white-light mediating PDT system.

与传统疗法相比，光动力疗法（PDT）具有时空选择性高、无创伤、耐药性低等特点，已被用于治疗特殊疾病或局部特殊部位的疾病。然而，绝大多数光敏剂仍存在水溶性差、光稳定性差等局限性。在此，我们采用了促进分子内电荷转移和末端修饰这两种策略来克服这些限制并增强治疗效果。我们设计并合成了三种膜结构靶向分子：3CN-Np、3CN-OH 和 3CN-QA，它们具有高消光系数、优异的光稳定性和活性氧（ROS）生成能力。在细胞成像中，3CN-Np 和 3CN-OH 可分别染色内质网，3CN-QA 可染色细胞膜。然后用白光（25 mW/cm2）照射探针培养细胞 20 分钟，3CN-Np 的死活细胞比为 3.0，3CN-OH 为 3.5，3CN-QA 为 3.7。基于体外白光下细胞凋亡率高的特点，3CN-OH 被选中用于抑制体内肿瘤的生长，肿瘤体积缩小了 45%，且对生命体征无毒性。这项研究为开发具有高水溶性、光稳定性和 ROS 生成能力的 PSs 提供了新的视角，有助于白光介导的 PDT 系统。

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引用次数: 0

Recent progress in ESIPT-based fluorescent chemosensors for detection of Zn2+, Mg2+ and Cu2+ 基于 ESIPT 的 Zn2+、Mg2+ 和 Cu2+ 荧光化学传感器的最新进展

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-24 DOI: 10.1016/j.dyepig.2024.112509

Hossein Roohi

Sensing cations is an up-and-coming area of scientific research within chemical sensors, given its extensive applicability across clinical, biological, and environmental domains. Among various photophysical mechanisms, excited-state intramolecular proton transfer (ESIPT)-based probes offer distinct advantages due to their photophysical characteristics, including a narrowed emission band, sensitivity to solvent polarity, red-shifted fluorescence emission, high quantum yield, and other favorable properties. The ESIPT mechanism involves two sets of normal (N) and tautomer (T) energy levels which contribute to establishing four stable electronic energy levels in single proton transfer systems. Fluorescent probes utilizing the ESIPT phenomenon in the selective detection of cations have become versatile tools in scientific exploration. The progress of ESIPT-based fluorescent probes typically involves a design strategy aimed at inhibiting the ESIPT process, and, in turn, quenching fluorescence emission. In the “turn-on” fluorescent mechanism, when the chemosensor binds with metal ions, it disrupts fast non-radiative processes, enhancing structural stability and leading to a CHEF (chelation-enhanced fluorescence) effect. The cations in the complexes are commonly coordinated by tridentate ligands, leading to distinctive spectral changes that enable the detection of cations. This review article aims to present a comprehensive overview of recent progress and potential applications related to ESIPT-based dyes in sensing three main cations Zn²⁺, Mg²⁺ and Cu²⁺. The unique properties and mechanisms of ESIPT-based probes for cation sensing are elucidated through various validation approaches, offering insights into their design, performance, and future prospects in the field of chemical sensing.

感应阳离子是化学传感器中一个新兴的科学研究领域，因为它广泛应用于临床、生物和环境领域。在各种光物理机制中，基于激发态分子内质子转移（ESIPT）的探针因其光物理特性（包括发射带变窄、对溶剂极性敏感、荧光发射红移、高量子产率和其他有利特性）而具有明显的优势。ESIPT 机制涉及两组正常（N）能级和同系物（T）能级，它们有助于在单质子转移系统中建立四个稳定的电子能级。利用 ESIPT 现象选择性检测阳离子的荧光探针已成为科学探索的多功能工具。基于 ESIPT 的荧光探针的研究进展通常涉及旨在抑制 ESIPT 过程的设计策略，进而淬灭荧光发射。在 "开启 "荧光机制中，当化学传感器与金属离子结合时，会破坏快速的非辐射过程，增强结构稳定性，从而产生 CHEF（螯合增强荧光）效应。配合物中的阳离子通常由三叉配体配位，从而导致独特的光谱变化，使阳离子的检测成为可能。这篇综述文章旨在全面概述基于 ESIPT 的染料在传感三种主要阳离子 Zn2+、Mg2+ 和 Cu2+ 方面的最新进展和潜在应用。文章通过各种验证方法，阐明了基于 ESIPT 的阳离子传感探针的独特性质和机理，为其在化学传感领域的设计、性能和未来前景提供了深入的见解。

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引用次数: 0

New advances in benzodithiophene (BDT)-based small molecules in non-fullerence organic solar cells 苯并二噻吩 (BDT) 基小分子在非全长有机太阳能电池中的新进展

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-23 DOI: 10.1016/j.dyepig.2024.112508

Jing Li , Min Lin , Han Wang , Javed Iqbal , Kai Wang

The power conversion efficiencies (PCEs) of non-fullerence organic solar cells (OSCs) have exceeding 20 %, largely attributable to the availability of Y-series acceptor materials. Most current high-efficiency OSCs utilize polymer donors, in comparison with polymer donors, small molecule (SM) donor materials offer distinct advantages such as facile synthesis, high yields, and minimal batch-related issues, thereby facilitating the commercialization of cost-effective OSCs. Currently, the PCE of OSCs employing SM donors have surpassed 20 %. This review elucidates significant recent advancements of SM donors, focusing particularly on the benzodithiophene (BDT) unit derivatives, and investigates how the chemical structure of SM donors impacts molecular conformation and stacking patterns. Additionally, we explore criteria for donor-acceptor materials compatibility and methods for morphological control. Finally, we outline persistent challenges and provide insights into the future development of small molecule donor-based OSCs.

非全光勒有机太阳能电池（OSC）的功率转换效率（PCE）已超过 20%，这主要归功于 Y 系列受体材料的可用性。与聚合物供体相比，小分子（SM）供体材料具有合成简便、产量高、批量相关问题少等显著优势，从而促进了具有成本效益的有机太阳能电池的商业化。目前，采用 SM 供体的 OSC 的 PCE 已超过 20%。本综述阐明了 SM 供体的最新重大进展，尤其侧重于苯并二噻吩（BDT）单元衍生物，并研究了 SM 供体的化学结构如何影响分子构象和堆叠模式。此外，我们还探讨了供体-受体材料兼容性标准和形态控制方法。最后，我们概述了持续存在的挑战，并对基于小分子供体的 OSC 的未来发展提出了见解。

引用次数: 0

Thermochromic behavior of pigment red 254 in nylon 6 polymer for high-chromaticity engineering plastics 用于高色度工程塑料的尼龙 6 聚合物中颜料红 254 的热致变色特性

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-23 DOI: 10.1016/j.dyepig.2024.112507

Jiancheng Wang , Sai Zeng , Hao Liu , Yiquan Zheng , Yuguang Ma

Advancement in Color-Material-Finishing (CMF) plays a crucial role in enhancing the visual appeal of plastic products, particularly for the high-chroma nylon plastics that are currently in vogue. However, it is inevitable to encounter pigment-dyeing issues in polar engineering plastics during the high-temperature extrusion process, which can lead to intense fluorescence and color fading. This phenomenon, characterized by the dissolution of pigments in a polar environment, can adversely affect the color saturation and weatherability of the pigment, which ultimately cause sharp reduction of aesthetic quality and durability of the plastic. Herein, we develop a modified strategy combined with thermal annealing to realize rapid color recovery in nylon 6, and further reveal the fluorescence and discoloration mechanism of pigment red 254 in nylon 6. Through improving the mobility of nylon chain segments, the rigid heterogeneous nucleation regions centered on the interfacial hydrogen bond between nylon 6 and the pigment molecules loosens with the help of heat treatment, and then the dissolved pigment molecules reaggregate to induce fluorescence quenching. Importantly, as a consequence of the increased lubricity segments, the required thermal annealing temperature and time for color recovery and fluorescence quenching could be significantly shortened from 180 °C for 5 h to 100 °C for 0.5 h. This work provides a feasible approach for the industrial production of high-chroma polar engineering plastics.

色彩材料加工（CMF）技术的进步在提高塑料产品的视觉吸引力方面发挥着至关重要的作用，尤其是对于目前流行的高色度尼龙塑料而言。然而，极性工程塑料在高温挤出过程中不可避免地会遇到颜料染色问题，从而导致强烈的荧光和褪色。这种现象的特点是颜料在极性环境中溶解，会对颜料的色彩饱和度和耐候性产生不利影响，最终导致塑料的美观度和耐用性急剧下降。在此，我们开发了一种结合热退火的改良策略，以实现尼龙 6 的快速颜色恢复，并进一步揭示了颜料红 254 在尼龙 6 中的荧光和褪色机理。通过提高尼龙链段的流动性，以尼龙 6 和颜料分子之间的界面氢键为中心的刚性异质成核区在热处理的帮助下松动，然后溶解的颜料分子重新聚集，诱导荧光淬灭。重要的是，由于润滑性段的增加，颜色恢复和荧光淬灭所需的热退火温度和时间可从 180 °C 5 小时大幅缩短至 100 °C 0.5 小时。

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引用次数: 0

A novel colored chitosan-modified polystyrene composite dye nanospheres with enhanced coloring properties for binder-free printing 一种新型有色壳聚糖改性聚苯乙烯复合染料纳米球，具有更强的着色性能，可用于无粘合剂印花

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-22 DOI: 10.1016/j.dyepig.2024.112506

Jinyun Wu , Bo Li , Peibo Du , Xiaokai Xin , Zaisheng Cai , Fengyan Ge

The limited utilization rate of dyes for coloring coupled with the consumption of large quantities of chemical reagents, can result in acute environmental pollution and waste of resources. Herein, in accordance with the electrostatic attraction between electropositivity of chitosan and anionic dyes, a novel type of chitosan-modified cationic polystyrene nanospheres (PSCS) was creatively synthesized, which can be innovatively employed as a special carrier with an adsorption capacity of up to 197.4mg/g for acid dyes. Consequently, a exclusive pigment identified as colored chitosan-modified polystyrene composite dye nanospheres (PSCS(AR9)) was procured. Simultaneously, the binder-free printing was accomplished by leveraging the intrinsic self-curing property of PSCS(AR9) for screen printing of textiles. Additionally, printed fabrics with PSCS(AR9) exhibited superb darkening effect (the K/S value can be increased by 2 times.) in conjunction with significantly improved hand feel in contrast with the conventional printed fabrics. The last but not least, the rubbing fastness of the printed fabrics using PSCS(AR9) can meet demand of the practical application. Therefore, this work may provide an innovative insight for constructing a new type of environmentally friendly and depth-enhanced printed textile.

由于染料用于着色的利用率有限，加上需要消耗大量化学试剂，因此会造成严重的环境污染和资源浪费。本文根据壳聚糖的正电性与阴离子染料之间的静电吸引力，创造性地合成了一种新型壳聚糖改性阳离子聚苯乙烯纳米球（PSCS），可创新性地用作酸性染料的特殊载体，其吸附容量高达 197.4 毫克/克。由此，一种名为有色壳聚糖改性聚苯乙烯复合染料纳米球（PSCS(AR9)）的独特颜料诞生了。同时，利用 PSCS（AR9）固有的自固化特性，实现了纺织品丝网印花的无粘合剂印花。此外，与传统印花织物相比，使用 PSCS（AR9）印花的织物具有极佳的增暗效果（K/S 值可提高 2 倍），手感也有明显改善。最后，使用 PSCS(AR9) 的印花织物的耐摩擦牢度也能满足实际应用的需求。因此，这项研究可为构建新型环保深度增强印花织物提供创新性见解。

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引用次数: 0

Dyeing behaviour of iron(III)-gallic acid complexes on wool as function of pH-dependent iron(III)-complex stoichiometry 铁(III)-金属酸络合物在羊毛上的染色行为与 pH 值相关的铁(III)-络合物化学计量的关系

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-22 DOI: 10.1016/j.dyepig.2024.112502

Christa Fitz-Binder, Avinash Pradip Manian, Margit Lenninger, Susanna Ortlieb, Thomas Bechtold, Tung Pham

Iron complexes with polyphenolics e.g. gallotannins and flavonoids have been used since ancient times for coloration of textiles, painting and preparation of inks. The composition of iron gall inks on historical artefacts has been investigated with modern instrumental methods. However the dyeing behaviour of iron-complexes with polyphenols still bases on empirical knowledge. In this study Fe(III)-complexes with gallic acid were used as model system to elucidate their pH dependent sorption and dyeing behaviour on wool. At dyebath pH 3 high sorption of Fe(III)-gallic acid complexes was observed, however darker dyeings were obtained at dyebath pH 4. Model calculations for the complex species present in the dyebath indicated the presence of the binary complex [Fe(III)(GA²⁻)]⁺ as main species at pH 3, while at pH 4 the ternary species [Fe(III)(GA²⁻)₂]^- prevails. The dye sorption bases on Van-der-Waals forces, while ionic interactions between Fe(III)-complex and keratin are of minor relevance. The elaborated theoretical model also explains the influence of dyebath pH in dyeing with gallotannins, polyphenols and flavonoids in presence of iron salts and thus is of particular relevance for improved utilisation of these natural colorants.

铁与多酚（如五倍子单宁和黄酮类化合物）的络合物自古以来就被用于纺织品着色、绘画和制备墨水。历史文物上的铁胆墨水成分已通过现代仪器方法进行了研究。然而，铁与多酚的络合物的染色行为仍然基于经验知识。本研究将没食子酸铁（III）络合物作为模型系统，以阐明它们在羊毛上随 pH 值变化的吸附和染色行为。对染浴中存在的络合物种类进行的模型计算表明，在 pH 值为 3 时，主要存在二元络合物 [Fe(III)(GA2-)]+，而在 pH 值为 4 时，主要存在三元络合物 [Fe(III)(GA2-)2]-。染料吸附作用的基础是范德华力，而 Fe(III)- 复合物与角蛋白之间的离子相互作用关系不大。所阐述的理论模型还解释了在铁盐存在的情况下，五倍子单宁、多酚和黄酮类化合物在染色时染浴 pH 值的影响，因此对提高这些天然着色剂的利用率具有特别重要的意义。

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引用次数: 0

Rational design and synthesis of pyrrolo-pyridine dinitrile dyes with strong dual-state emission 具有强双态发射的吡咯并吡啶二腈染料的合理设计与合成

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-21 DOI: 10.1016/j.dyepig.2024.112505

Yingnan Xu , Huaxin Zhu , Yang Zhao , Yunchao Li , Wen Shi , Ying Zhu , Chenghao Wang , Duyong Chen , Wenqiang Qiao , Zhi Yuan Wang

In recent years, there has been a growing focus on organic dual-state emission (DSE) materials that demonstrate robust luminescence in both solid and solution states. Nevertheless, in the solid state, π-π stacking between organic molecules often results in pronounced luminescence quenching, posing a significant challenge for the design and synthesis of organic DSE materials. In this work, a pyrrolo-pyridine dinitrile (PPDN) dye was synthesized from commercially available 2-heteroaryl acetonitriles and classical diketopyrrolopyrrole (DPP) dye via a two-step process. Due to its special "J"-shaped planar conjugate structure, the PPDN dye has strong DSE performance, high molar extinction coefficients (ε), large Stokes shifts, and excellent optical and thermal stability. It also has aniline vision detection capability, which is useful in the field of security displays and anti-counterfeiting.

近年来，人们越来越关注有机双态发射（DSE）材料，这些材料在固态和溶液态下都能表现出强大的发光能力。然而，在固态下，有机分子间的π-π堆积往往会导致明显的发光淬灭，这给有机双态发光材料的设计和合成带来了巨大挑战。在这项工作中，我们通过两步法从市售的 2-heteroaryl 乙腈和经典的二酮吡咯（DPP）染料合成了一种吡咯并吡啶二腈（PPDN）染料。由于其特殊的 "J "形平面共轭结构，PPDN 染料具有较强的 DSE 性能、较高的摩尔消光系数（ε）、较大的斯托克斯位移以及优异的光学和热稳定性。它还具有苯胺视觉检测能力，可用于安全显示和防伪领域。

引用次数: 0

Electrochromic conjugated polymers: The relationship of gradient band gap and electrochromic performance 电致变色共轭聚合物：梯度带隙与电致变色性能的关系

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-10-21 DOI: 10.1016/j.dyepig.2024.112504

Kaiwen Lin , Changjun Wu , Shouyi Ming , Difeng Xie , Junhong Lin , Zhiqi Huo , Fangchan Lu , Chaohua Feng , Hao Liu , Hongtao Liu , Jingze Li , Yuehui Wang

In the pursuit of high-performance electrochromic materials, in this paper, six donor-acceptor type with different gradient band gaps electrochromic conjugated polymers, named PBTz-T, PBTz-TT, PBTz-DT, PTBTO8-T, PTBTO8-TT, and PTBTO8-DT, were synthesized via direct (hetero) arylation polymerization, employing two benzothiadiazole derivatives with varying electron-accepting capabilities and three thiophene derivatives with different electron-donating capacities. The structures, optical, electrochemical, and electrochromic properties of the six polymers were investigated. As the number of fused thiophene increases, enhancing the electron-donating ability, a growth trend of electrochemical stability is observed for all polymers. Meanwhile, enhance electron-accepting capabilities of acceptors (from benzotriazole to benzothiadiazole) significantly lower the electronic band gap and improve electrochemical stability. PBTz-DT boasts a bleaching time of 0.3 s, outperforming most reported electrochromic polymers. PBTz-T, at 530 nm, exhibits exceptionally high coloration efficiency, reaching 916 cm² C⁻¹, and demonstrates higher electron utilization and lower energy consumption, making it an excellent candidate for high-performance electrochromic devices. This work compared studies the relationship of gradient band gaps of electrochromic conjugated polymers and their electrochemical and electrochromic performance, offers new insights into enhancing the electrochemical stability and synthesizing high coloration efficiency electrochromic materials.

为了追求高性能电致变色材料，本文采用两种具有不同电子接受能力的苯并噻二唑衍生物和三种具有不同电子供体能力的噻吩衍生物，通过直接（杂）芳基化聚合反应合成了六种具有不同梯度带隙的供体-受体型电致变色共轭聚合物，分别命名为 PBTz-T、PBTz-TT、PBTz-DT、PTBTO8-T、PTBTO8-TT 和 PTBTO8-DT。研究了这六种聚合物的结构、光学、电化学和电致变色特性。随着融合噻吩数量的增加，电子负载能力增强，所有聚合物的电化学稳定性都呈上升趋势。同时，增强受体（从苯并三唑到苯并噻二唑）的电子接受能力可显著降低电子带隙，提高电化学稳定性。PBTz-DT 的漂白时间为 0.3 秒，优于大多数已报道的电致变色聚合物。在 530 纳米波长下，PBTz-T 的着色效率极高，达到 916 cm2 C-1，而且电子利用率更高，能耗更低，是高性能电致变色设备的理想候选材料。这项研究比较了电致变色共轭聚合物的梯度带隙与其电化学和电致变色性能的关系，为提高电化学稳定性和合成高着色效率的电致变色材料提供了新的见解。

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引用次数: 0