Judd-Ofelt Analysis on Trifluoroacetate Europium Complexes for Liquid Laser Media  

作　　者：SHE Jiang-bo LI Dong-dong GAO Fei QIAO Ze-bang LIU Huan-huan WEI Wei PENG Bo 

机构地区：[1]State Key Laboratory of Transient Optics and Photonics, Xi 'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi 'an 710119, P. R. China [2]School of Electronic Engineering, Xi' an University of Posts and Telecommunications, Xi 'an 710121, P. R. China [3]Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, P. R. China

出　　处：《Chemical Research in Chinese Universities》2013年第1期166-170,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（Nos.60977023, 61108061）.

摘　　要：Four europium trifiuoroacetate complexes, Eu（CF3COO）3＂bpy（bpy=2,2＇-bipyridine）（l）, Eu（CF3COO）3＂ phen（phen=l,10-phenanthroline）（2）, Eu（CF3COO）3.2bp（bp=benzophenone）（3） and Eu（CF3COO）3-2tppo（tppo=triphenyl- phosphine oxide）（4） were synthesized and characterized by elemental analysis, Fourier transform infrared（FTIR） spectroscopy, photoluminescence（PL） spectroscopy and thermogravimetric analysis（TGA）. The PL spectra of the complexes at room temperature show the strong typical Eu3＋ ion red emission, due to the efficient energy ＂antenna absorption＂ of ligands and transitions of Eu3＋ ion between 5Do----7Fj（j-0-4）. The long lifetime and high quantum yield reflect that the multiphonon relaxations by coupling to O--H and C--H vibrations were reduced. According to the photoluminescent spectra, the Judd-Ofelt parameters f22 and 04 of the complexes were calculated and the radiative properties were also presented. The 5D0 radiative lifetime, quantum yield and the stimulated emission cross-section of the complexes are excellent, which prove that they have promising optical properties for liquid laser. The thermal analyses indicate that they are quite stable to heat.Four europium trifiuoroacetate complexes, Eu（CF3COO）3＂bpy（bpy=2,2＇-bipyridine）（l）, Eu（CF3COO）3＂ phen（phen=l,10-phenanthroline）（2）, Eu（CF3COO）3.2bp（bp=benzophenone）（3） and Eu（CF3COO）3-2tppo（tppo=triphenyl- phosphine oxide）（4） were synthesized and characterized by elemental analysis, Fourier transform infrared（FTIR） spectroscopy, photoluminescence（PL） spectroscopy and thermogravimetric analysis（TGA）. The PL spectra of the complexes at room temperature show the strong typical Eu3＋ ion red emission, due to the efficient energy ＂antenna absorption＂ of ligands and transitions of Eu3＋ ion between 5Do----7Fj（j-0-4）. The long lifetime and high quantum yield reflect that the multiphonon relaxations by coupling to O--H and C--H vibrations were reduced. According to the photoluminescent spectra, the Judd-Ofelt parameters f22 and 04 of the complexes were calculated and the radiative properties were also presented. The 5D0 radiative lifetime, quantum yield and the stimulated emission cross-section of the complexes are excellent, which prove that they have promising optical properties for liquid laser. The thermal analyses indicate that they are quite stable to heat.

关 键 词：Europium complex Luminescent property Judd-Ofelt theory 

分 类 号：O614.338[理学—无机化学] TQ171.112[理学—化学]