Pillar[n]arenes, as a new class of macrocyclic hosts, show bright prospect due to their rigid cavity structures, rich host-guest interactions, and easy functionalization. How to improve the host-guest recognition selectivity, signal report sensitivity and host-guest assembly properties of the pillar[n]arene-based hosts by rational functionalization is an attractive issue. Among various of functionalization approaches for pillar[5]arenes, constructing conjugated systems through the A, A′-sites of pillar[5]arenes is a very crucial method. In contrast to conventional alkoxy chain-functionalized pillar[5]arenes, conjugated pillar[5]arenes exhibit superior charge transfer and signal response capabilities, as well as a rigid structure that facilitates the construction of framework materials. Furthermore, they readily facilitate collaborative effects through functionalized groups within the cavity of the pillar[5]arenes. There are many nice works on design synthesis and applications of conjugated pillar[5]arenes in various fields. This minireview presents a systematic introduction on the synthesis of conjugated pillar[5]arenes and their applications in different fields.

中文翻译：

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共轭柱[5]芳烃的合成及应用

柱芳烃作为一类新型大环主体，由于其刚性的空腔结构、丰富的主客体相互作用和易于功能化而显示出广阔的前景。如何通过合理的功能化来提高基于柱芳烃的主体的主客体识别选择性、信号报告灵敏度和主客体组装性能是一个有吸引力的问题。在柱[5]芳烃的各种官能化方法中，通过柱[5]芳烃的A、A'位点构建共轭体系是一种非常关键的方法。与传统的烷氧基链官能化柱[5]芳烃相比，共轭柱[5]芳烃表现出优异的电荷转移和信号响应能力，以及有利于骨架材料构建的刚性结构。此外，它们很容易通过柱[5]芳烃空腔内的官能团促进协同效应。关于共轭柱[5]芳烃的设计合成和在各个领域的应用，有许多优秀的工作。本综述系统介绍了共轭柱[5]芳烃的合成及其在不同领域的应用。