一种新型酰腙配体及其Sn配合物的荧光特性研究  

Studies on Fluorescence Properties of a Novel Acylhydrazone Ligands and Its Sn Metal Complexes

作　　者：高学喜[1] 王文军[1] 刘云龙[1] 李大成[2] 张丙元[1] 徐建华[3] 

机构地区：[1]聊城大学物理科学与信息工程学院,山东聊城252059 [2]聊城大学化学化工学院,山东聊城252059 [3]精密光谱科学与技术国家重点实验室,华东师范大学物理系,上海200062

出　　处：《光谱学与光谱分析》2012年第1期147-151,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10874063);山东省科技攻关计划项目(2010GGX10127);山东省教育厅科技发展计划项目(J10LA60)资助

摘　　要：用稳态荧光和时间分辨荧光研究了一种新型酰腙配体2-羟基甲醛-5-氯水杨酰腙(H3L)及Sn配合物(n-Bu2)Sn(HL)晶体、溶液和旋涂膜的光谱特性与分子结构的关系。实验结果表明,对H3L而言,与其稀溶液相比,晶体及旋涂膜的荧光强度依次增强,荧光峰位都有所红移,荧光寿命有所延长,其单分子跃迁能为240.2kJ.mol-1;对[(n-Bu2)Sn(HL)]而言,其晶体稳态荧光强度比在溶液中强且荧光峰位红移,旋涂膜产生了荧光猝灭,单分子跃迁能为230.4kJ.mol-1;与H3L相比较,(n-Bu2)Sn(HL)晶体的荧光强度要强接近4倍,荧光寿命变长。这些现象的物理机制是分子的共轭体系越大、分子的刚性越大其荧光强度越强,荧光寿命越长。The molecular structure and spectral properties of a novel acylhydrazone ligands 2-hydroxy-naphthaldehyde-5-chlorosalicyloyl hydrazone（H3L） and its Sn metal complexes [（n-Bu2）Sn（HL）] in solutio n,crystal and thin films were investigated by using steady state and time resol ved fluorescence spectrum..The experimental results show that for H3L,compar ed with it in solution,the fluorescence intensity is enhanced as it is crystal and thin films,the fluorescence peak is red-shift.and the excited state life time is longer.The transition energies of the unimolecule is 240.2 kJ·mol-1.For（n-Bu2）Sn（HL）,the fluorescence intensity is stronger as it i s crystal than it is in solution and the fluorescence peak is red-shilft,the e xcited state lifetime is longer.The fluorescence is quenched as it is in thin films.The transition energies of the unimolecule is 230.4 kJ·mol-1.The fluorescence intensity of（n-Bu2）Sn（HL） is four times higher than the H 3L.The excited state lifetime of（n-Bu2）Sn（HL） is longer than H3L to o.In theory,these phenomena could be explained by that with the increase of th e conjugated system and the rigid construction,the fluorescence intensity is st ronger and the excited state lifetime is longer.

关 键 词：酰腙配体 金属配合物 稳态、时间分辨荧光谱 分子结构 

分 类 号：O433.4[机械工程—光学工程]