Efficient two-photon sensitized luminescence of europium (Ⅲ) complex based on hypersensitive transitions  

作　　者：史萌 李华 潘梅 苏富芳 马丽丽 韩培高 汪河洲 

机构地区：[1]Shandong Provincial Key Laboratory of Laser Polarization and Information Technology,Laser Institute,Qufu Normal University [2]Xingtan College,Qufu Normal University [3]School of Chemistry and Chemical Engineering,Sun Yat-Sen University [4]School of Physics and Engineenng,Sun Yat-Sen University,State Key Laboratory of Optoelectronic Materials and Technologies

出　　处：《Chinese Optics Letters》2011年第5期56-58,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 20903120);the Project of shandong Provincial Higher Educational Science and Technology Program (No. J10LA10);the Doctoral Research Foundation of Qufu Normal University

摘　　要：Red frequency-upconversion fluorescence emission is observed in europium（Ⅲ） complex with encapsulating polybenzimidazole tripodal ligands, pumped with 930- and 1070-nm picosecond laser pulses. The lumines- cence of transition 5D0 →7F2 （612 nm） is induced by two-photon absorption of hypersensitive transitions 7F0 →5D2 （465 nm） and 7F1 →5D1 （535 nm）. Analysis results suggest that the two-photon excitation strength of these hypersensitive transitions is increased dramatically owing to the C3 symmetry of the coordination field.Red frequency-upconversion fluorescence emission is observed in europium（Ⅲ） complex with encapsulating polybenzimidazole tripodal ligands, pumped with 930- and 1070-nm picosecond laser pulses. The lumines- cence of transition 5D0 →7F2 （612 nm） is induced by two-photon absorption of hypersensitive transitions 7F0 →5D2 （465 nm） and 7F1 →5D1 （535 nm）. Analysis results suggest that the two-photon excitation strength of these hypersensitive transitions is increased dramatically owing to the C3 symmetry of the coordination field.

关 键 词：Efficient two-photon sensitized luminescence of europium complex based on hypersensitive transitions 

分 类 号：TN241[电子电信—物理电子学]