Synthesis, Crystal Structure and Luminescence of a New Europium(Ⅲ) Coordination Polymer with Imidazole Carboxylic Ligand  

作　　者：DAI Yu-Mei LIU Meng-Jia XU Jie 戴玉梅;刘蒙佳;徐杰(Department of Chemistry and Life Sciences, Minnan Science and Technology Institute,Fujian Normal University)

机构地区：[1]Department of Chemistry and Life Sciences, Minnan Science and Technology Institute,Fujian Normal University

出　　处：《Chinese Journal of Structural Chemistry》2019年第6期970-976,共7页结构化学（英文）

基　　金：financially supported by the Youth Teachers’Training Foundation of Minnan Science and Technology Institute,Young and Middle-age Academic Leader Plan of Quanzhou University,National University Student Innovation and Entrepreneurship Project(201812992001);the undergraduate education teaching reform in Fujian province(2017)

摘　　要：A new luminescent compound, {[Eu3（L）4（H2 O）8]·（NO3）·4 H2 O}n（1, H2 L = 2-（pyridine-3-yl）-imidazole-4,5-dicarboxylic acid） has been solvothermally synthesized and structurally characterized by elemental analyses, IR and single-crystal X-ray diffraction. 1 crystallizes in monoclinic, space group C2/c with a = 21.0183（19）, b = 9.5227（6）, c = 28.227（3） ?, β = 106.885（5）o, V = 5406.1（8） ?3, Dc = 2.038 g/cm3, μ = 3.358 mm-1, Mr = 1658.76, F（000） = 3247, Z = 4, the final R = 0.0488, wR = 0.1195 and S = 1.075. The deprotonated L ligand employs a μ4-bridge to coordinate with three Eu（Ⅲ） ion, forming a wave-like（3,4）-connected 2 D structure. The existence of π···π interaction between the pyridine rings of L ligands leads to an infinite 3 D network. Furthermore, the thermal analysis, powder diffraction and solid-state photoluminescent properties of compound 1 have also been investigated.

关 键 词：europium(Ⅲ) coordination polymer 2-(pyridine-3-yl)-1H-imidazole-4 5-dicarboxylate photoluminescence 

分 类 号：O641.4[理学—物理化学]