一例镉(Ⅱ)配合物的合成、结构与性质

摘要/Abstract

摘要： 本文以2-羟乙基苯并咪唑-5-羧酸(Hhebimc)、己二酸(H₂hex)和硝酸镉为原料,合成了新型镉配合物[Cd₂(hebimc)₂(hex)]·2H₂O。对该配合物进行单晶X射线单晶衍射、元素分析、红外光谱、热重、粉末X射线衍射及荧光光谱等测试。单晶X射线衍射结果表明:配合物为三斜晶系,空间群为P1,中心离子Cd(Ⅱ)离子为六配位扭曲的八面体几何构型,晶胞参数为a=0.860 33(15) nm,b=0.906 59(16) nm,c=1.012 03(18) nm,α=74.826(3)°,β=73.131(3)°,γ=85.128(3)°,V=0.729 0(2) nm³,是一例具有超分子网络结构的配位聚合物。荧光光谱分析表明,配合物与自由配体具有相似的发光特性。

关键词: 2-羟乙基苯并咪唑-5-羧酸, 己二酸, Cd(Ⅱ)配合物, 晶体结构, 发光特性

Abstract: In this paper, a new cadmium complex [Cd₂(hebimc)₂(hex)]·2H₂O was synthesized using 2-hydroxybenzimidazole-5-carboxylic acid (Hhebimc), hexadiic acid (H₂hex) and Cd(NO₃)₂·6H₂O as raw materials. The complex was characterized by X-ray single crystal diffraction, elemental analysis, infrared spectrum, TG, XRD and fluorescence spectrum. The single crystal X-ray diffraction results show that the complex is triclinic, the space group is P1, the central Cd(Ⅱ) has a distorted octahedral configuration, the crystal cell parameters are a=0.860 33(15) nm, b=0.906 59(16) nm, c=1.012 03(18) nm, α=74.826(3)°, β=73.131(3)°, γ=85.128(3)°, V=0.729 0(2)nm³, which is a coordination polymer with three-dimensional supermolecular framework. Fluorescence spectrum analysis shows that the complex has similar luminescent properties to the free ligand.

Key words: 2-hydroxyethyl benzimidazole-5-carboxylic acid, adipic acid, Cd(Ⅱ) complex, crystal structure, luminescent property

中图分类号:

O641

伍国云, 刘丹, 危冬梅. 一例镉(Ⅱ)配合物的合成、结构与性质[J]. 人工晶体学报, 2022, 51(2): 304-308.

WU Guoyun, LIU Dan, WEI Dongmei. Synthesis, Structure and Properties of a Cadmium (Ⅱ) Complex[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(2): 304-308.

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