| 苯二甲酸衍生物及含氮配体构筑的两个镍配位聚合物的合成、晶体结构与热稳定性研究 |
| Syntheses, Crystal Structures, Thermal Stabilities of Nickel(Ⅱ) Coordination Polymers Constructed from the Substitutional Benzenedicarboxylic Acid and Auxiliary N-Donor Ligands |
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| 摘要: 使用硝酸镍分别与2个含取代基的苯基二羧酸3-硝基邻苯二甲酸（3-NPAH2）和5-溴间苯二甲酸（H2BIPA）以及2个刚性含氮配体4，4’-联吡啶（4，4’-bipy）、1，4’-二咪唑基二苯（L=1，4’-bis（imidazol-yl）benzene）在水热条件下合成了2个镍配位聚合物，即，[Ni（3-NPA）（4，4’-bipy）（H2O）]n（1）和[Ni（BIPA）（L）]n（2）.表征了2个化合物的红外光谱、元素分析、热重、X-射线单晶衍射以及X-射线粉末衍射。化合物1是三斜晶系，P1空间群，含有[Ni（OCO）4Ni]双核单元，该双核单元再通过4，4’-联吡啶连接而成一个二维单层结构。层与层之间通过羧酸氧原子与配位水分子之间产生氢键作用。化合物2是单斜晶系，P21/c空间群，含有[Ni2（COO）2]双核单元，该双核单元进一步通过BIPA2-构成了一个双链结构，该双链再通过1，4’-二咪唑基二苯桥联配体连接形成了一个三维框架结构。此外，热重分析结果显示化合物2具有较高的热稳定性。 |
| 关键词: 金属有机框架 晶体结构 刚性配体 热稳定性 |
| 基金项目: 国家自然科学基金（No.21101019）和国家大学生创新训练项目（No.201311306028）资助项目。 |
| Abstract: Two nickel(Ⅱ) coordination polymers based on two substitutional benzenedicarboxylic acid ligands (3-NPAH2=3-nitrophthalic acid, H2BIPA=5-bromoisophthalic acid) and two different N-donor ligands (4,4'-bipy=4,4'-bipyridine, L=1,4'-bis(imidazol-yl)benzene) have been hydrothermally synthesized, namely, [Ni(3-NPA)(4,4'-bipy)(H2O)]n (1) and [Ni(BIPA)(L)]n (2). The two compounds were characterized by IR spectrum, elemental analysis, powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction, and thermal stabilities. Compound 1 crystallizes in the triclinic space group P1. Compound 1 features a two-dimensional (2D) single layer structure based on a dimer unit [Ni(OCO)4Ni] through four carboxylate groups from two 3-NPA2-ligands, which is further linked by the 4,4'-bipy molecules. Hydrogen bond interactions are found among the carboxylate oxygen atoms and the coordinated water between the layers. Compound 2 crystallizes in a monoclinic space group P21/c. Compound 2 displays a three-dimensional (3D) framework structure based on the double chain structure containing the dimer [Ni2(COO)2] unit, which is further extended into the 3D framework structure by the L molecules. Furthermore, the thermal stabilities properties of compounds 1 and 2 were also investigated in detail. Compound 2 shows relatively high thermal stability property. CCDC: 986627, 1; CCDC: 986628, 2. |
| Keywords: Metal-organic frameworks (MOFs) crystal structure rigid ligand thermal stability |
| 投稿时间：2014-02-13 修订日期：2014-03-27 |
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| 汪鹏飞,吴小说,魏博,吴国志.苯二甲酸衍生物及含氮配体构筑的两个镍配位聚合物的合成、晶体结构与热稳定性研究[J].无机化学学报,2014,30(7):1511-1517. |
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