具有聚集诱导发光效应的氰基四苯基乙烯类衍生物的压致变色性能研究  

Study on mechanochromic properties of cyanotetraphenylethylene derivatives with aggregation-induced emission effect

作　　者：齐云鹏 南光明 何晓燕 王俊龙 矫淞霖 QI Yun-peng;NAN Guang-ming;HE Xiao-yan;WANG Jun-long;JIAO Song-lin(School of Chemistry and Environmental Science,Yili Normal University,Yining 835000,China)

机构地区：[1]伊犁师范大学化学与环境科学学院,新疆伊宁835000

出　　处：《分子科学学报》2022年第4期336-341,共6页Journal of Molecular Science

基　　金：伊犁师范大学科研项目(2020YSYB002).

摘　　要：本文设计合成了一个新型的氰基四苯基乙烯类衍生物,该化合物具有聚集诱导发光(AIE)效应,并且展现出了一定的压致变色性质.该化合物的AIE效应来源于分子中四苯基乙烯(TPE)基团,分子内运动受限赋予了化合物AIE效应.压致变色性质则是由于外力破坏了原来晶体样品的晶格束缚能及分子间弱相互作用力,使得目标化合物发生晶态到无定型态的可逆转变,导致分子的构象及堆积模式发生变化,从而伴随发光行为的变化.此外,通过溶液的紫外-可见吸收光谱和荧光光谱等测试方法推测出此类分子压致诱导发光红移的原因可能是由于在压力下分子扭曲的构象发生平面化,增大了分子的共轭程度,降低了光学带隙,最终导致了荧光发射光谱的红移.Mechanochromic materials are a kind of intelligent response material whose luminous color changes obviously under the external force.From the point of view of their molecular structure,the molecules of these mechanochromic compounds do not have much correlation in the chemical structure.Therefore,it is necessary to continue to develop new mechanochromic material systems to reveal the relationship between the molecular structure and the properties of mechanochromic performance.Aggregation-induced emission(AIE)materials have become an important source of mechanochromic materials.And tetraphenylethylene(TPE)is a typical AIE molecule.It has attracted the attention of researchers due to its simple preparation,easy derivatization,and obvious AIE effect.In addition,β-diketone boron fluoride complexes are a type of fluorescent dyes with optical properties such as high electron mobility,fluorescence intensity,and stimulus responsiveness.Outstanding optical properties make it widely used in the fields of organic fluorescent materials such as biological imaging,organic photovoltaic cells,anti-counterfeiting labels and ultrahigh-density information storage.In this work,a TPE with a twisted propeller structure was incorporated into the boron difluorideβ-diketone complex,and a new type of TPE derivative was synthesized by chemical modification to introduce cyano substituents using it as the molecular skeleton.And we mainly studied the AIE effect,mechanochromic performance and the mechanochromic mechanism of the target compound.The compound unsurprisingly shows AIE effect and mechanochromic properties.The AIE effect of the compound is derived from the TPE group in the molecule,and the restriction of intramolecular motion gives the compound AIE effect.The mechanochromic properties are due to the fact that the external force destroys the lattice energy of the original crystal sample and the weak intermolecular interaction,which causes the target compound to undergo a reversible transformation from the crystalline state to the a

关 键 词：压致变色 聚集诱导发光 四苯基乙烯 Β-二酮 

分 类 号：O622[理学—有机化学]