| 铜离子配位调控的TICT荧光化合物的双重荧光发射 |
| Copper(Ⅱ) Ion Coordination-Controlled Twisted Intramolecular Charge Transfer Dual Fluorescence Emission |
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| 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。 |
| 关键词: 分子内扭转电荷转移（TICT） 双重荧光 铜离子 配位 “开-关-开” |
| 基金项目: 国家自然科学基金（No.21271150）和国家基础科学人才培养基金（No.J1310024）资助项目。 |
| 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 PETinhibition. The dual fluorescence of 1 exhibits emission quenching initially and then long-wavelength band (TICTband) 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 TICTstate emission. Fluorophore 1 is a new TICTcompound in which TICTemission can be tuned by copper ions with a dramatic change via "on-off-on" signalling behaviour. CCDC: 899958, Cu2+-1. |
| Keywords: twisted intramolecular charge transfer dual fluorescence copper(Ⅱ) ion coordination “on-off-on” signalling behaviour |
| 投稿时间：2014-02-19 修订日期：2014-04-20 |
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| 张静丽,范伟贞,闫素婷,林丽榕,黄荣彬.铜离子配位调控的TICT荧光化合物的双重荧光发射[J].无机化学学报,2014,30(9):2181-2188. |
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