具有力致变色功能的Diels-Alder加成物力色团的合成与研究

具有力致变色功能的力色团在材料探伤、压力探测等方面有着出色的应用前景，但是目前已报道的该类力色团的数量和种类都相当有限。本项目旨在开发两类新型具有力致变色功能的、基于Diels-Alder（DA）加成物的力色团，并探究其力响应性行为与结构之间的关系。其中一类是基于炔与蒽或蒽的衍生物的DA加成物力色团，它们具有“flex-activation”特性，被激活时能够释放出具有荧光的小分子蒽或蒽的衍生物；另一类则是基于呋喃或蒽与近几年才被发现的具有荧光的马来酰亚胺衍生物的DA加成物力色团。通过对本项目的研究，希望成功地开发出一些优秀的具有力致变色功能的力色团，并且构建DA加成物力色团结构与性能的关系，为开发新型力色团及力响应性材料提供新的思路与方法。

Mechanochromic mechanophores have promising applications in materials science, such as damage detection and stress sensing. However, there are limited quantities and types of these mechanophores reported so far. The goal of this proposal is to develop two kinds of novel mechanochromic mechanophores based on Diels-Alder (DA) adducts and investigate the relationship between their force-responsiveness and structure. One is based on the DA adducts between dimethyl acetylenedicarboxylate and anthracene (or its derivatives), which can release small fluorescent molecules upon “flex-activation” by mechanical force. The other one is based on the DA adducts between furan/anthracene and fluorescent maleimide derivatives that have just been discovered during recent years. It is hoped that the proposed research would result in the development of several outstanding mechanochromic mechanophores, establish a general structure-property relationship for DA adduct mechanophores, and thus provide new thoughts and means on the development of novel mechanophores and force-responsive materials.