Synthesis, crystal structure and photophysical properties of a neodymium trifluoroacetate complex with 2,2'-bipyridine

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• 作者：Jiangbo SHE^a ; Dongdong LI^a ; Chaoqi HOU^a ; ^b ; Wenzheng YANG^a ; Wei WEI^b ; ^{weiwei@njupt.edu.cn} ; Bo PENG^a ; ^b ; ^{bpeng@opt.ac.cn}
• 关键词：neodymium trifluoroacetate ; 2 ; 2'-bipyridine ; crystal structure ; luminescent property ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2011
• 出版时间：March 2011
• 年：2011
• 卷：29
• 期：3
• 页码：193-197
• 全文大小：661 K

文摘

The neodymium trifluoroacetate complexes were synthesized and characterized by single-crystal X-ray diffraction for [Nd(CF₃COO)₃·Bpy·(H₂O)₃]Bpy (1), elemental and TG analysis, FT-IR spectra, and PL spectra for Nd(CF₃COO)₃·Bpy (2) (Bpy: 2,2'-bipyridine). The most interesting feature of the crystal structure for 1 is that it comprises a coordinated 2,2'-bipyridine molecule and an out-sphere 2,2'-bipyridine molecule. At the same time, the C-O distances appeared average which indicates the three atoms of carboxylato forming electron-conjugate system. Hydrogen bond and p-p-stacking link the binuclear to two-dimensional sheet. The optical spectra for 2 exhibited that the complex possessed typical Nd (III) ion absorption and photoluminescence emission. The emission cross-section of ⁴F_3/2→⁴I_11/2 fluorescence transition (3.63×10⁻²⁰ cm²) was comparable with some laser glasses, which indicated good radiative properties of this neodymium trifluoroacetate complex in liquid matrix. The thermal analysis indicated that it was quite stable to heat.