【摘要】 设计合成了2个分子内扭转电荷转移(TICT)荧光体(1和2),铜离子的配位作用可开关其双重荧光发射。2在乙腈/水溶液(1∶1,V/V)中的双重荧光发射随着铜离子的加入以类似电子转移机制"开-关"形式猝灭,而1在铜离子与其计量比为1之内的乙腈/水溶液(1∶1,V/V)中,其双重荧光发射随着铜离子的加入逐渐猝灭;在计量比之后其长波长的TICT荧光发射随着铜离子的加入逐渐增强。即1的TICT荧光发射以"开-关-开"的机制被铜离子诱导。同时还获得了铜离子与1形成的配合物的晶体结构以及配合物的荧光性质。1H NMR波谱滴定实验表明荧光体的电荷转移程度是影响TICT发射的主要因素,1是一个新的且其TICT发射可以被铜离子调制为"开-关-开"的TICT荧光体。更多还原

【Abstract】 Two twisted intramolecular charge transfer(TICT) fluorophores(1 and 2) were designed and synthesized to control the dual fluorescence emission by Cu2 +coordination. The dual fluorescence of 2 is quenched upon the addition of Cu2+ions in an "on-off" process similar to PET inhibition. The dual fluorescence of 1 exhibits emission quenching initially and then long-wavelength band(TICT band) emission enhancement with "on-off-on" signalling behaviour. The crystal structure of the Cu2+complex with 1 was also obtained, and its fluorescence properties were reported.1H NMR spectral titration results indicate that the degree of charge transfer is a crucial factor for the resulting TICT state emission. Fluorophore 1 is a new TICT compound in which TICT emission can be tuned by copper ions with a dramatic change via "on-off-on" signalling behaviour. CCDC: 899958, Cu2+-1.更多还原