| 胆甾醇修饰羟基喹啉锌的聚集诱导荧光蓝移 |
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| 引用本文： | 冯文科,孔胜,肖立新,王树峰,龚旗煌.胆甾醇修饰羟基喹啉锌的聚集诱导荧光蓝移[J].物理化学学报,2010,26(7):1929-1933. |
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| 作者姓名： | 冯文科 孔胜 肖立新 王树峰 龚旗煌 |
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| 作者单位： | State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, P. R. China |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划项目(973)(2009CB930504;2006CB806007)资助 The project was supported by the National Natural Science Foundation of China，National Key Basic Research Program of China(973) |
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| 摘 要： | 用稳态光谱以及皮秒瞬态荧光光谱研究了新型有机电致发光分子胆甾醇修饰羟基喹啉锌(Zn(ChQ)2)的聚集诱导荧光蓝移性质. 在Zn(ChQ)2的极性溶剂溶液中, 分子激发后会发生从胆甾醇基团向喹啉环的光致电子转移, 转移后形成了“扭转的分子内电荷转移态”作为新的荧光发射态. 而在薄膜态中, 分子由于聚集产生空间位阻, 不能形成新的荧光发射态, 相对于极性溶剂中, 产生聚集荧光增强效应, 荧光发射峰会蓝移, 发射强度会增强. 在薄膜态中, 全波长上的超快荧光衰减说明存在分子间光致能量转移过程.
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| 关 键 词： | 分子内电子转移 羟基喹啉锌 胆甾醇 聚集诱导荧光蓝移 |
| 收稿时间： | 2010-03-15 |
| 修稿时间： | 2010-05-27 |
Aggregation Induced Fluorescence Blue-Shift of Zinc Bis(8-hydroxyquinoline)Modified with Cholesteryl |
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| FENG Wen-Ke,KONG Sheng,XIAO Li-Xin,WANG Shu-Feng,GONG Qi-Huang.Aggregation Induced Fluorescence Blue-Shift of Zinc Bis(8-hydroxyquinoline)Modified with Cholesteryl[J].Acta Physico-Chimica Sinica,2010,26(7):1929-1933. |
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| Authors: | FENG Wen-Ke KONG Sheng XIAO Li-Xin WANG Shu-Feng GONG Qi-Huang |
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| Institution: | State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, P. R. China |
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| Abstract: | Aggregation induced fluorescence blue-shift of the newly synthesized zinc bis(8-hydroxyquinolme)modified with cholesteryl(Zn(ChQ)2)is studied by static and picosecond transient emission spectroscopy.Fast solventinduced charge transfer is found when Zn(CbQ)2 is dissolved in polar solvents.The twisted intramolecular charge transfer (TICT)state is formed as new emission state.Its emission spectra of Zn(ChQ)2 in aggregation form(film state)are blue-shifted compared to those in Dolar solvents.Steric hindrance indueed weakened intermolecular interaction in aggregations lead to blue-shifted emission and enhanced quantum efficiency.Intermolecular energy transfer is found in solid film and independent on emission wavelength. |
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| Keywords: | Intramolecular electron transfer Zinc bis(8-hydroxyquinoline) Cholcsteryl Aggregation induced fluorescence blue-shift |
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