可用蓝光激发的以羧基联吡啶为桥联配体的Ir(Ⅲ)-Eu(Ⅲ)双金属配合物  

Blue light excited bimetallic Ir(Ⅲ)-Eu(Ⅲ) complex using 4-carboxyl-2,2'-bipyridine as bridge-linking ligand

作　　者：卫慧波[1] 卞梦颖[2] 刘志伟[1] 卞祖强[1] 黄春辉[1] 

机构地区：[1]北京分子科学国家实验室,稀土材料化学及应用国家重点实验室,北京大学化学与分子工程学院,北京100871 [2]天津大学化工学院,天津300072

出　　处：《中国科学：化学》2012年第9期1364-1371,共8页SCIENTIA SINICA Chimica

基　　金：国家高技术研究发展计划(2011AA03A407);国家自然科学基金(20971006;90922004)的支持

摘　　要：本文制备了一种以羧基联吡啶为桥联配体的Ir(Ⅲ)-Eu(Ⅲ)双金属配合物,并且进行了详细的光物理性质表征.该配合物具有高的光致发光量子效率(46%),而且Ir(Ⅲ)配合物作为天线分子对Eu(Ⅲ)离子具有很高的敏化效率(93%).TD-DFT计算研究表明,羧基联吡啶在传能过程中起到重要作用.利用Ir(Ⅲ)配合物长波长的3MLCT吸收,可以把激发波长扩展到500nm的可见光范围.Novel bimetallic Ir（Ⅲ）-Eu（Ⅲ） complex using 4-carboxyl-2,2＇-bipyridine as bridge-linking ligand was synthesized and its photophysieal property was fully investigated. Photoluminescent quantum yield of the bimetallic complex was found to be as high as 46%. The Ir（Ⅲ） complex, with strong antenna effect on the Eu（Ⅲ） ion, has a sensitization efficiency of 93%. From TD-DFT investigation, it is found that the bridge-linking ligand plays important roles during the energy transfer process. Moreover, excitation spectra of the bimetallic Ir（Ⅲ）-Eu（Ⅲ） complex can be expanded to 500 nm, which originates from 3MLCT absorption of the Ir（Ⅲ） complex.

关 键 词：Ir(Ⅲ)-Eu(Ⅲ)双金属配合物 光致发光 TD-DFT 

分 类 号：O627[理学—有机化学]