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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。
Two intramolecular torsion charge transfer (TICT) phosphors (1 and 2) were designed and synthesized, and the coordination of copper ions switched double fluorescence emission. 2 double fluorescence emission in acetonitrile / water solution (1: 1, V / V) quenches with the addition of copper ion in the form of “on-off” similar to the electron transfer mechanism, 1 in acetonitrile / water solution (1: 1, V / V), its double fluorescence emission gradually quenches with the addition of copper ions; its long wavelength TICT fluorescence emission after the metering ratio gradually increases with the addition of copper ions Enhanced. That is, the TICT fluorescence emission of 1 is induced by copper ion with the mechanism of “on-off-on”. At the same time, the crystal structure of the complexes formed by copper ions and 1 and the fluorescence properties of the complexes were also obtained. 1H NMR spectroscopic titration experiments show that the degree of charge transfer of the phosphor is the main factor affecting the emission of TICT, and 1 is a new TICT phosphor whose TICT emission can be modulated by copper ions to “on-off-on”.