Synthesis and Optical Properties of Nd(Ⅲ) Perfluoro-Carboxylate Complexes with 2,2’-Bipyridine
SHE Jiang-bo1, LI Dong-dong2, WANG Peng-fei1, ZHU Yong-gang1, WEI Wei3*, PENG Bo1,3*
1. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences，Xi’an 710119, China 2. School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710061, China 3. Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
Abstract：A series of neodymium complexes, Nd(CF3COO)3·Dipy, Nd(C2F5COO)3·Dipy and Nd(C3F7COO)3·Dipy were synthesized and characterized by FTIR spectra, elemental analysis, thermogravimetric analysis, UV-Vis-NIR absorption spectra and PL spectra. The decomposition temperature was found to be more than 260 ℃ and maximum weight losses rates above 340 ℃ which indicate that they have good thermal stability. The low vibrational energy C—F bonds were used to replace the C—H bonds in organic group for improving the optical properties of materials. The length of carbon chain and the coordination structure of Nd(Ⅲ) affect the absorption transition strength. According to the UV-Vis-NIR absorption spectra, the Judd-Ofelt parameters were calculated and the radiative properties were also presented. The stimulated emission cross-sections of the Nd(CF3COO)3·Dipy, Nd(C2F5COO)3·Dipy and Nd(C3F7COO)3·Dipy were 3.63×10-20, 2.36×10-20 and 1.49×10-20 cm2 respectively, which were as good as some reported inorganic materials. These complexes will be a series of promising materials for liquid laser application.
