Polycatenar mesogens based on phenothiazine imine: Liquid crystal and photophysical properties

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-04-10 DOI:10.1016/j.dyepig.2025.112817

Yixian Li , Shibo Chen , Yuantang Duan , Zilong Guo , Wenyong Xiong , Hongmei Zhao , Xiaohong Cheng

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引用次数: 0

Abstract

The first phenothiazine (PT) imine polycatenar columnar mesogens consisting of a PT central core with 4′-substituted biphenylene-4-imino units at both wings and connecting with two terminal 2,4,5-trialkoxyphenyl groups via ester or ether links have been synthesized. These compounds self-assemble into hexagonal columnar liquid crystalline (LC) mesophases. They exhibit green to yellow fluorescence emission with large stokes shift in their LC, solution and solid states. They show aggregation-induced enhanced emission (AIEE) and mechanofluorochromic (MFC) behavior. The influences of ester or ether links on their properties have been discussed. Ether compound PT-E, with more planar conformation and higher electron density on the PT core, forms gel in an organic solution and shows stronger solid-state fluorescence emission, AIEE and MFC effects. The applications of PT-E as a chemosensor towards Al (III) and in white light emission diode (WLED) have been explored. In addition, using Caenorhabditis elegans as an animal model, the bioimaging of these fluorescence materials has been investigated. The results show that Caenorhabditis elegans (C. elegans) exhibits greater fluorescence in the PT-E solution.

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基于吩噻嗪亚胺的多链链间质：液晶和光物理性质

合成了首个吩噻嗪（PT）亚胺多链状柱状间质，其中心核两侧为4′-取代的联苯-4-亚胺单元，并通过酯或醚连接两个末端2,4,5-三烷氧苯基。这些化合物自组装成六方柱状液晶（LC）中间相。它们在液相、溶液和固体状态下均表现出绿色到黄色的荧光发射，具有较大的斯托克斯位移。它们表现出聚集诱导的增强发射（AIEE）和机械荧光（MFC）行为。讨论了酯或醚连接对其性能的影响。醚类化合物PT- e具有更多的平面构象和更高的PT核电子密度，在有机溶液中形成凝胶，表现出更强的固态荧光发射、AIEE和MFC效应。探讨了PT-E作为化学传感器在Al （III）和白光发射二极管（WLED）中的应用。此外，以秀丽隐杆线虫为动物模型，研究了这些荧光材料的生物成像特性。结果表明，秀丽隐杆线虫（C. elegans）在pet - e溶液中表现出更强的荧光。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.