Crystal Structure and Properties of [PrCl(H_2O)_3(L)(HL)]_nnCl(HL=3-Hydroxy-2-methylquinoline-4-carboxylic acid) with One-dimensional Chains  

作　　者：YI Xiu-Guang LIU Yan-Zhu FANG Xiao-Niu ZHOU Xiao-Ying LI Yong-Xiu 易绣光;刘艳珠;方小牛;周小英;李永绣(School of Materials Science and Engineering & School of Chemistry, Nanchang University;Institute of Applied Chemistry, Jiangxi Province Key Laboratory of Coordination Chemistry,School of Chemistry and Chemical Engineering, Jinggangshan University;School of New Energy Science and Engineering, Xinyu University)

机构地区：[1]School of Materials Science and Engineering & School of Chemistry, Nanchang University [2]Institute of Applied Chemistry, Jiangxi Province Key Laboratory of Coordination Chemistry,School of Chemistry and Chemical Engineering, Jinggangshan University [3]School of New Energy Science and Engineering, Xinyu University

出　　处：《Chinese Journal of Structural Chemistry》2019年第2期325-330,169,共7页结构化学（英文）

基　　金：supported by the NNSFC(51363009,21764007);Jiangxi Provincial Department of Education’s Item of Science and Technology(GJJ160745 and GJJ151217)

摘　　要：A novel praseodymium complex [PrCl(H_2O)_3(L)(HL)]_nnCl(1, HL = 3-hydroxy-2-methylquinoline-4-carboxylic acid) has been synthesized through hydrothermal reactions and characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in P2_1 space group of the monoclinic system, with a = 7.3146(2), b = 9.3963(3), c = 17.4872(5) ?, β = 96.818(3)°, V = 1193.40(6) ?~3, C_(22)H_(23)Cl_2N_2O_9Pr, M_r = 671.23, Z = 2, D_c = 1.868 g/cm^3, μ(MoKα) = 2.322 mm^(-1) and F(000) = 668. The praseodymium ion is surrounded by seven oxygen atoms and one chlorine atom to yield a slightly distorted square antiprism. Complex 1 is characterized by a one-dimensional chain-like structure. A two-dimensional supramolecular layer is formed via hydrogen-bonding interactions. Solid-state photoluminescence spectrum reveals that it shows red emission. The emission bands are ascribed to the characteristic emission of the 4 f electron transitions of ~3P_0 → ~3H_J(J = 5 and 6) and ~3P_0 → ~3F_4 of Pr^(3+) ions. Solid-state UV/Vis diffuse reflectance spectroscopy exhibits that it has an optical band gap of 2.75 eV.

关 键 词：photoluminescence PRASEODYMIUM semiconductor SUPERMOLECULE lanthanide 

分 类 号：TQ[化学工程]