Recent Trends in the Design, Synthesis, Spectroscopic Behavior, and Applications of Benzazole-Based Molecules with Solid-State Luminescence Enhancement Properties

IF 7.1 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Topics in Current Chemistry Pub Date : 2021-08-03 DOI:10.1007/s41061-021-00344-8
Suzanne Fery-Forgues, Corinne Vanucci-Bacqué
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引用次数: 10

Abstract

Molecules that exhibit solid-state luminescence enhancement, i.e. the rare property to be more strongly emissive in the solid state than in solution, find an increasing number of applications in the fields of optoelectronic and nanophotonic devices, sensors, security papers, imaging, and theranostics. Benzazole (BZ) heterocycles are of particular value in this context. The simple enlargement of their π-electron system using a –C=C–Ar or –N=C–Ar moiety is enough for intrinsic solid-state luminescence enhancement (SLE) properties to appear. Their association with a variety of polyaromatic motifs leads to SLE-active molecules that frequently display attractive electroluminescent properties and are sensitive to mechanical stimuli. The excited-state intramolecular proton transfer (ESIPT) process that takes place in some hydroxy derivatives reinforces the SLE effect and enables the development of new sensors based on a protection/deprotection strategy. BZ may also be incorporated into frameworks that are prototypical aggregation-induced enhancement (AIE) luminogens, such as the popular tetraphenylethene (TPE), leading to materials with excellent optical and electroluminescent performance. This review encompasses the various ways to use BZ units in SLE systems. It underlines the significant progresses recently made in the understanding of the photophysical mechanisms involved. A brief overview of the synthesis shows that BZ units are robust building blocks, easily incorporated into a variety of structures. Generally speaking, we try to show how these small heterocycles may offer advantages for the design of increasingly efficient luminescent materials.

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具有固态发光增强性能的苯并唑类分子的设计、合成、光谱行为和应用的最新进展
表现出固态发光增强的分子,即在固态中比在溶液中发射更强的罕见特性,在光电和纳米光子器件、传感器、安全纸、成像和治疗学领域得到越来越多的应用。在这种情况下,苯并唑(BZ)杂环具有特殊的价值。简单地用-C = C-Ar或-N = C-Ar片段扩大π-电子系统,就足以显示本征固态发光增强(SLE)特性。它们与多种多芳基元的关联导致slel活性分子经常显示有吸引力的电致发光特性,并且对机械刺激敏感。在一些羟基衍生物中发生的激发态分子内质子转移(ESIPT)过程加强了SLE效应,并使基于保护/去保护策略的新传感器的开发成为可能。BZ也可以加入到典型的聚集诱导增强(AIE)发光源的框架中,例如流行的四苯乙烯(TPE),从而获得具有优异光学和电致发光性能的材料。本文综述了在SLE系统中使用BZ单元的各种方法。它强调了最近在理解所涉及的光物理机制方面取得的重大进展。对合成的简要概述表明,BZ单元是坚固的构建块,很容易合并到各种结构中。一般来说,我们试图展示这些小杂环如何为设计越来越高效的发光材料提供优势。
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来源期刊
Topics in Current Chemistry
Topics in Current Chemistry Chemistry-General Chemistry
CiteScore
13.70
自引率
1.20%
发文量
48
期刊介绍: Topics in Current Chemistry is a journal that presents critical reviews of present and future trends in modern chemical research. It covers all areas of chemical science, including interactions with related disciplines like biology, medicine, physics, and materials science. The articles in this journal are organized into thematic collections, offering a comprehensive perspective on emerging research to non-specialist readers in academia or industry. Each review article focuses on one aspect of the topic and provides a critical survey, placing it in the context of the collection. Selected examples highlight significant developments from the past 5 to 10 years. Instead of providing an exhaustive summary or extensive data, the articles concentrate on methodological thinking. This approach allows non-specialist readers to understand the information fully and presents the potential prospects for future developments.
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