新咪唑类化合物的短波长双光子荧光物理特性  

Structure Dependent Two-photon Induced Blue Emission Properties of New Imidazole Organic Molecules

作　　者：李娜[1] 范海华[1] 汪河洲[1] 钟增培[2] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广东广州510275 [2]中山大学化学与化学工程学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2005年第1期41-44,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(19934002;10274108);广东省自然科学基金资助项目

摘　　要：报道短波长双光子吸收的新咪唑类化合物的光物理特性与结构的关系。实验研究表明:蓝光波段的双光子吸收有机分子通常共轭链短,增强端基拉电子基的强度是增大双光子吸收的关键。即电荷转移偶极矩的大小决定了分子双光子吸收的强弱。实验还研究了这批新分子的蓝光荧光量子产率与结构的关系。这批新蓝光发射化合物中,最大的双光子吸收截面高达252 1GM;最大的荧光量子产率高达96 5%。The structure dependent two_photon absorption and emission properties of new imidazole organic molecules are reported. Experimental results show that the short π_conjugation structure of imidazole organic molecules benefits blue emission,and indicate that two_photon absorption cross_section is mainly dependent on the strength of charge transfer dipole moment, i.e. with same π_conjugated center, the two_photon absorption cross_section will change violently with the donor acceptor end group. Furthermore, the quantum yield also change violently by the modifications of end group. A two_photon absorption cross_section of 252.1 GM and a quantum_yield of 96.1% have been obtained in this work.

关 键 词：超快速激光光谱 双光了诱导荧光 有机杂环化合物 结构-性能关系 

分 类 号：O437[机械工程—光学工程]