苯并噻唑
溶剂变色
烯醇
分子内力
光化学
激发态
化学
分子
氢键
猝灭(荧光)
异质结双极晶体管
接受者
荧光
立体化学
有机化学
原子物理学
催化作用
电压
晶体管
物理
量子力学
凝聚态物理
双极结晶体管
作者
Yahui Niu,Rong Wang,Pan‐Lin Shao,Yuxiu Wang,Yanrong Zhang
标识
DOI:10.1002/chem.201803938
摘要
Abstract Excited‐state intramolecular charge transfer (ESICT) and excited‐state intramolecular proton transfer (ESIPT) are two competitive reactions that occur in the excited states of organic dyes that contain intramolecular hydrogen‐bonds and electron acceptors and donors. Determining the mechanisms of these processes is key to understanding their multiple emission features, as the manner in which these processes interact can be modulated by modifying the dye structure. In addition, donor–π–acceptor (D–π–A) molecules often suffer from aggregation‐induced quenching. Herein, we report the synthesis of three nitrophenyl‐modified 2‐(2‐hydroxyphenyl)benzothiazole (HBT) derivatives, HBT‐s‐NO 2 , HBT‐d‐NO 2 , and HBT‐t‐NO 2 , which have C−C, C=C, and C≡C bonds between their HBT and nitrophenyl moieties, respectively. Compared with the enol emissions from HBT‐s‐NO 2 and HBT‐t‐NO 2 , that from HBT‐d‐NO 2 exhibits outstanding solvatochromism owing to consecutive ESICT‐ESIPT. In addition, X‐ray diffraction reveals that despite the highly planar and polar nature of HBT‐d‐NO 2 , which is strongly H‐aggregated, it exhibits highly efficient fluorescence. Hence, this study provides new insight into the design of ESICT/ESIPT‐coupled systems and for engendering planar dipolar molecules with excellent emission properties in the solid state.
科研通智能强力驱动
Strongly Powered by AbleSci AI