Solvent-Induced Polyelectrolyte Conjugation for Fluorescence-Dependence Solvent Detection

IF 18.5 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Yueqin Shi, Jiawei Shao, Jianxiang Wang, Rui Guo, Zhengjun Li, Ning Li, Qi Zhang, Liang Chu
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Abstract

Solvated assembly and fluorescence are two distinct features of conjugated polyelectrolytes for remarkable optoelectronic properties. However, the essential correlation between solvated assembly and fluorescence properties is still undiscovered. Here, two homopolymers based on benzotriazole (BTz) backbones with pyridinium cation-pendants (PBTz-PyrBr) and quaternary amine cation-pendants (PBTz-TMABr) are designed to distinguish fluorescence response in polar solvents, which evokes a novel application in fluorescence-dependence solvent detection. The conjugated backbones offer orderly aligned electron-rich nitrogen atoms to chemically react with the quaternary amine cation-pendants for creating a space conjugation, serving as a fluorescence sensing site in polar solvents. In low-polarity solvents, conjugated chains tend to twist and aggregate, accompanied by the space-conjugation enhancement. This behavior increases the fluorescence performance by suppressing both inter- and intra-molecular charge transfer. Furthermore, a theoretical linear-correlation is established between fluorescence and solvent polarity/concentration to elucidate the experimental rule, giving a robust opportunity for solvent detection.

Abstract Image

荧光依赖性溶剂检测的溶剂诱导多电解质偶联
溶剂化组装和荧光是共轭聚电解质具有显著光电性能的两个显著特征。然而,溶剂化组装与荧光性质之间的本质相关性仍未被发现。本文设计了两种基于苯并三唑(BTz)骨架和吡啶阳离子悬垂物(PBTz-PyrBr)和季胺阳离子悬垂物(pbtz - tabr)的均聚物,用于区分极性溶剂中的荧光响应,这在荧光依赖性溶剂检测中具有新的应用。共轭骨架提供有序排列的富电子氮原子,与季胺阳离子悬垂物化学反应,形成空间共轭,在极性溶剂中作为荧光传感位点。在低极性溶剂中,共轭链倾向于扭曲和聚集,并伴有空间共轭增强。这种行为通过抑制分子间和分子内的电荷转移来提高荧光性能。此外,在荧光和溶剂极性/浓度之间建立了理论线性相关性,以阐明实验规则,为溶剂检测提供了强大的机会。
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来源期刊
Advanced Functional Materials
Advanced Functional Materials 工程技术-材料科学:综合
CiteScore
29.50
自引率
4.20%
发文量
2086
审稿时长
2.1 months
期刊介绍: Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.
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