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Molecular design and application of luminescent materials composed of group 13 elements with an aggregation-induced emission property

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National Science Review 2021年第6期8卷 80-93页

作者： shunichiro ito Masayuki Gon Kazuo Tanaka Yoshiki Chujo Department of Polymer Chemistry Graduate School of EngineeringKyoto University

Complexation of π-conjugated ligands by metal or semimetal ions leads to the enhancement of the planarity and rigidity of π-conjugated systems. Boron, especially, has played a central role in the design of luminescent main-group complexes. However, these complexes still suffer the disadvantage of aggregation-caused quenching as well as typical organic fluorophores. It has recently been reported that some types of boron complexes exhibit the aggregation-induced emission(AIE) property. Moreover, AIE behavior from complexes and organometallic compounds composed of the other group 13 elements, such as aluminum and gallium, has emerged in this decade. These observations greatly encourage us to develop advanced functional materials based on the group 13 elements. Indeed, recent research has demonstrated that these classes of materials are potentially versatile scaffolds for constructing chromic luminophores,efficiently emissive π-conjugated polymers and so on. This review mainly describes AIE-active group 13 complexes with four-coordinate structures and their application as photo-functional materials. Proposed mechanisms of the origins of AIE behavior are briefly discussed.

关键词： aggregation-induced emission crystallization-induced emission chromism conjugated polymer group 13

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