铽-苯甲酸-邻菲咯啉三元配合物绿色、黄色荧光转变研究  

Study on the Transition of Green, Yellow Fluorescence of Ternary Complexes of Tb-Benzoic Acid-1,10-Phenanthroline

作　　者：王喜贵[1] 吴红英[1] 姚光庆[2] 翁诗甫[2] 吴瑾光[2] 

机构地区：[1]内蒙古师范大学化学系,内蒙古呼和浩特010022 [2]北京大学化学与分子工程学院

出　　处：《光谱学与光谱分析》2004年第6期708-712,共5页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展规划项目(G1 9980 61 31 1 );国家自然科学基金项目(2 0 1 61 0 0 1 );内蒙古自治区自然科学基金资助项目(2 0 0 1 0 90 1 1 4 );内蒙古师范大学和北京大学合作项目资助课题

摘　　要：合成了铽 (Tb) 苯甲酸 (L) 邻菲咯啉 (phen)三元配合物 ,并与Tb 苯甲酸的二元配合物相比较 ,研究了它们的发光性质。结果显示 ,第二配体邻菲咯啉的引入并未降低Tb3+ 的发光强度 ,但却使Tb3+ 的荧光寿命明显缩短 ,而且首次发现 ,沉淀晶粒的聚合状态影响三元配合物的发光性质。当晶粒较为分散时 ,三元配合物中Tb3+ 的 5D4 → 7F5的跃迁几率很大 ,显示Tb3+ 特征的绿色荧光。随着晶粒的聚集 ,5D4 7F5的跃迁几率减小 ;而显红色荧光的5D4 → 7F3跃迁几率明显增加 ,结果使铽 苯甲酸 邻菲咯啉三元配合物在紫外灯下显示黄色荧光。In this paper, ternary solid complexes of Tb-benzioc acid-1, 10-phenanthroline have been synthesized. Compared with binary complexes of Tb-benzioc: acid, their proper-ties were investigated. The results showed that the second ligand-phenanthroline enhanced the fluorescence intensities of Tb3+, and shortened its fluorescence lifetime, and it was found that the aggregative state influenced the luminescence properties of ternary complexes. When particulates dispersed to a certain degree, the probability of D-5(4) --> F-7(5) transition of Tb3+ was great, so, green fluorescence was observed for the complexes. With the aggregation of particles, the probability of D-5(4) --> F-7(5) transition of Tb3+ decreased, while the probability of D-5(4) --> F-7(3) transition increased. Therefore, ternary complexes of Tb-benzoic acid-1, 10-phenanthroline exhibited yellow fluorescence. In addition, spectroscopic properties of the complexes were investigated.

关 键 词：铽-苯甲酸-邻菲咯啉三元配合物 发光性质 绿色荧光 黄色荧光 聚合状态 发光材料 

分 类 号：O614.341[理学—无机化学] TN104.3[理学—化学]