| 由咪唑-4,5-二羧酸和1,4-对苯二甲酸构筑的一个三维镉(Ⅱ)配位聚合物的合成、结构及荧光性质 |
| Synthesis, Structure and Property of a 3D Cd(Ⅱ) Coordination Polymer Based on Mixed-Ligands of Imidazole-4,5-Dicarboxylate and 1,4-Benzenedicarboxylate |
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| 摘要: 以CdCl2、咪唑-4，5-二羧酸(H3IDC)和1，4-对苯二甲酸(H2BDC)为原料，在水热条件下合成得到了一个新的三维镉(Ⅱ)配位聚合物[Cd2(HIDC)(BDC)(H2O)]n(1)，通过元素分析、红外光谱、粉末X-射线衍射、热重分析和单晶X-射线衍射法等对其组成和结构进行了表征。单晶X-射线结构分析表明，在配合物1的晶体结构中含有沿a轴方向的一维无限的{[Cd2(CO2)]2(CO2)2}n配位聚合链。此聚合链再通过桥连HIDC2-与BDC2-配体的连接，最终形成一复杂的三维金属-有机框架结构。配合物1的固体室温荧光测试结果表明，在波长为350 nm的光激发下于456 nm处出现强烈的荧光发射。 |
| 关键词: 配位聚合物 混合配体 晶体结构 荧光性质 |
| 基金项目: 国家自然科学基金(No.21071099)和2012年广东省大学生创新训练计划(No.gdcxcy2012-28)资助项目。 |
| Abstract: Reaction of CdCl2 with mixed-ligands of imidazole-4,5-dicarboxylic acid (H3IDC) and 1,4-benzenedicar-boxylic acid (H2BDC) under hydrothermal condition, yielded a new 3D cadmium(Ⅱ) coordination polymer of[Cd2(HIDC)(BDC)(H2O)]n(1), which was structurally characterized by elemental analysis, infrared spectroscopy, powder X-ray diffraction, and single-crystal X-ray diffraction. The result of single-crystal X-ray diffraction analysis reveals that complex 1 crystallizes in the monoclinic crystal system with P21/n space group, a=0.884 34(2) nm, b=1.577 50(3) nm, c=1.071 58(3) nm, β=97.227(2), V=1.483 03(6) nm3, Z=4, Dc=2.513 g·cm-3, F(000)=1 072, the final R1=0.031 5, wR2=0.053 1 for 2 674 observed reflections with I>2σ(I). In complex 1, the interconnection of Cd(Ⅱ) ions by carboxylate oxygen atoms from BDC2- ligands result in an infinite 1D polymeric chain of {[Cd2(CO2)]2(CO2)2}n along a axis. The polymeric chains are further connected by HIDC2- and BDC2- bridging ligands to form a complicated 3D metal-organic framework architecture. Furthermore, its thermal stability and luminescent property at room temperature in the solid state were also investigated. CCDC: 923674. |
| Keywords: coordination polymer mixed-ligands crystal structure luminescent property |
| 投稿时间：2013-02-20 修订日期：2013-09-18 |
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| 卢文贯,刘宏文,范智轩,赖秀霞,杨小云,谭国灿.由咪唑-4,5-二羧酸和1,4-对苯二甲酸构筑的一个三维镉(Ⅱ)配位聚合物的合成、结构及荧光性质[J].无机化学学报,2014,30(3):591-596. |
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