Effect of alkyl length dependent crystallinity for the mechanofluorochromic feature of alkyl phenothiazinyl tetraphenylethenyl acrylonitrile derivatives
作者:Chunping Ma、Xiqi Zhang、Yang Yang、Zhiyong Ma、Liutao Yang、Yujiao Wu、Hongliang Liu、Xinru Jia、Yen Wei
DOI:10.1039/c6tc00939e
日期:——
Three novel alkyl phenothiazinyl tetraphenylethenyl acrylonitrile derivatives (PhC3P4, PhC6P4, and PhC12P4) with alkyl groups of different lengths (–C3H7, –C6H13, –C12H25) were prepared in high yield (>90%) and successfully confirmed using 1H NMR, 13C NMR, and mass spectrometry. Quantum mechanical computation demonstrated significant difference in the conformation of alkyl chains among the compounds
以高收率(> 90%)制备了三种具有不同长度烷基(–C 3 H 7,–C 6 H 13,–C 12 H 25)的新颖的烷基吩噻嗪基四苯基乙烯基丙烯腈衍生物(PhC3P4,PhC6P4和PhC12P4)。并使用1 H NMR成功确认,131 H NMR和质谱。量子力学计算表明化合物之间烷基链的构型存在显着差异,但电子云的迁移无明显差异。在这些衍生物中证实了明显的扭曲的分子内电荷转移(TICT)和聚集诱导的发射(AIE)性质。但是,在三种化合物中发现了完全不同的机械荧光致变色特性,因为PhC3P4表现出明显的红移机械荧光致变色特征,而PhC6P4和PhC12P4几乎没有表现出机械荧光致变色现象。因此,进行了X射线散射,时间分辨的发射衰减行为和差示扫描量热法,表明PhC3P4的机械氟致变色机理归因于从晶态到非晶态的明显相变,并且Pc3P4的显着增加。加权平均寿命。相比之下,PhC6P4和PhC1