论文总字数：23073字

摘 要

有机金属框架材料作为近年来一类新兴的多孔材料，因其具有多样化的结构和独特的功能，在催化、生物医药、非线性光学等诸多领域都有优异的潜在性能，引起了科学家们的广泛关注。本论文选用1,2,4-苯三酸酐和硝酸锌，合成了以Zn为中心离子的多孔配位聚合物，并对其进行了红外、紫外、荧光性质、粉末和单晶的X-射线衍射分析，对化合物的结构作了初步讨论。结果表明，配合物Zn₃(C₉H₃O₆)₂·xH₂O属于C2/c空间群，每个不对称单元中有两个不同配位环境的Zn离子，每个配体和六个Zn离子配位，构成三维网状结构。通过红外光谱的分析，我们初步认为有H₂O分子参与到配位中。XRD结果表明大量制备的样品粉末化。通过紫外可见光谱观察到源于配体的π→π^*跃迁。该配合物在室温下的荧光现象并不鲜明，还待进一步的研究发现。

关键词：配位聚合物；有机配体；中心金属离子；晶体结构。

Abstract

Metal-organic frame materials is a new kind of porous material in recent years. Because of its diverse structure and unique features, it has excellent potential performance in many fields such as catalysis, biomedicine, and nonlinear optics, it has attracted widespread attention from scientists. In this paper, porous coordination polymers with Zn as central ion have been synthesized using C₉H₄O₅ and Zn(NO₃)₂ . The compounds is structurally characterized by XRPD, IR, single crystal X-ray diffractions and TG. The luminescent properties were also investigated for the compounds. The structure of the compound was discussed initially. The results show that the complex Zn₃(C₉H₃O₆)₂·xS belongs to the C2/c space group. There are two different coordination environments for Zn ions in every asymmetric unit. Each ligand and six Zn ions coordinate to form a three-dimensional network structure. Through the analysis of infrared spectroscopy, we preliminary believe that H₂O molecules participate exist in the coordination. The PXRD results showed that the bulk sample prepared was powdered and there is a π→π* transition from the ligand observed by UV-visible spectroscopy. However, the fluorescent phenomenon of the complex at room temperature is not clear, and it deserves to be further studied.

Key Words：Coordination polymer；organic ligands；center metal ion；crystal structure.

目 录

摘 要 I

Abstract II

目 录 III

第一章 引言 1

1.1多孔配位聚合物的发展 1

1.2多孔配位聚合物的分类 3

1.2.1含有羧基配体的多孔配位聚合物 3

1.2.2含有氮杂环类配体的配位聚合物 4

1.2.3含氮、氧的多基配体和其他混合配体的聚合物 6

1.3影响多孔有机配位聚合物合成的因素 7

1.3.1金属离子对配合物的影响 7

1.3.2配体对配合物的影响 7

1.3.3溶剂对配合物的影响 8

1.3.4阴离子对配合物的影响 9

1.3.5酸碱度对配位聚合物的影响 9

1.4 Zn（II）配位聚合物的研究发展 9

1.5本课题的选题意义以及研究思路 10

第二章 配合物Zn₃(C₉H₃O₆)₂的合成、表征和性质研究 11

2.1 仪器与试剂 11

2.2 实验步骤 12

2.3 单晶结构的分析与探究 12

2.4 配合物Zn₃(C₉H₃O₆)₂的晶体结构分析 15

2.5 配合物Zn₃(C₉H₃O₆)₂的光谱分析 17

2.5.1 红外光谱分析 17

2.5.2 紫外-可见吸收光谱分析 18

2.6 配合物Zn₃(C₉H₃O₆)₂的X射线光谱分析 19

2.6.1 粉末XRD 19

2.6.2 固体荧光 19

第三章 结论与展望 21

参考文献 22

致 谢 26

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