Synthesis,Crystal Structure and Luminescent Properties of TbCu(TeO_3)_2Cl  

作　　者：马恩 江海龙 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,The Chinese Academy of Sciences [2]Graduate School of the Chinese Academy of Sciences

出　　处：《Chinese Journal of Structural Chemistry》2007年第10期1159-1164,共6页结构化学（英文）

基　　金：the National Natural Science Foundation of China (No. 20573113)

摘　　要：TbCu（TeO3）2Cl was obtained in high yield from high temperature solid-state reacion of Tb407, CuO, CuCl2 and TeO2 in a 1：2：2：8 molar ratio at 710 ℃ in an evacuated quartz tube. Its structure was established by single-crystal X-ray diffraction. The title compound crystallizes in monoclinic, space group P21/c, with a = 5.409（2）, b = 14.994（6）, c = 9.183（4）A, β = 98.884（5）°, V = 735.8（5） A^3 and Z = 4. TbCu（TeO3）2Cl is isostructural with LnCu（TeO3）2X （Ln = Dy, X= Cl; Ln = Er, X = Cl, Br）. Its structure features a three-dimensional （3D） network built from Tb（Ⅲ） and Cu（Ⅱ） ions interconnected by tellurite and chloride anions; the chloride anion and the lone-pair electrons of the tellurium（Ⅳ） ions are oriented toward the cavities of the tunnels in the network. Solid-state luminescent spectrum of TbCu（TeO3）2Cl shows a strong emission band at 545 nm with a luminescent life time of 291 μs.TbCu（TeO3）2Cl was obtained in high yield from high temperature solid-state reacion of Tb407, CuO, CuCl2 and TeO2 in a 1：2：2：8 molar ratio at 710 ℃ in an evacuated quartz tube. Its structure was established by single-crystal X-ray diffraction. The title compound crystallizes in monoclinic, space group P21/c, with a = 5.409（2）, b = 14.994（6）, c = 9.183（4）A, β = 98.884（5）°, V = 735.8（5） A^3 and Z = 4. TbCu（TeO3）2Cl is isostructural with LnCu（TeO3）2X （Ln = Dy, X= Cl; Ln = Er, X = Cl, Br）. Its structure features a three-dimensional （3D） network built from Tb（Ⅲ） and Cu（Ⅱ） ions interconnected by tellurite and chloride anions; the chloride anion and the lone-pair electrons of the tellurium（Ⅳ） ions are oriented toward the cavities of the tunnels in the network. Solid-state luminescent spectrum of TbCu（TeO3）2Cl shows a strong emission band at 545 nm with a luminescent life time of 291 μs.

关 键 词：terbium（Ⅲ） tellurium（Ⅳ） oxychloride solid-state reaction crystal structure LUMINESCENCE 

分 类 号：O614.3[理学—无机化学]