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6-羟基吡啶-2-甲酸与Cu(Ⅱ)和Zn(Ⅱ)离子构筑的微孔超分子配合物的合成和结构
Synthesis and structure of microporous supramolecular complexes constructed by 6-hydroxypyridine-2-carboxylic acid with Cu(Ⅱ) and Zn(Ⅱ) ions
【Author】 Changyan Sun Xiangjun Zheng Linpei Jin (School of Chemistry, Beijing Normal University Beijing 100875)
【机构】 北京师范大学化学学院;
【摘要】 <正>微孔超分子配合物是由配位键与氢键、π-π堆积等其它非共价作用力共同构筑的具有微孔结构的配合物,它们在磁性、催化和分子识别等方面都有着潜在的应用前景,因此关于微孔超分子配合物的研究引起了化学家们的广泛关注。含有杂的氮原子和氧原子的多功能团的配体可以采取丰富多变的配位模式,且存在大量潜在的能形成氢键的位点,因而成为构筑微孔超分子配合物的首选配体。
【Abstract】 With hydrothermal reactions, we obtained two new microporous supramolecular complexes [Cu(L)(bpe)0.5(H2O)]n(l) and [Zn3(L)3(bpe)5(H2O)3]n·8.5H2O (2) ( H2L = 6-hydroxypyridine -2-carboxylic acid, bpe = l,2-bis(4-pyridine)ethane). Single crystal x-ray diffraction shows that different metal ions result in complexes with different structures, even using the same ligands. In complex 1, there is one crystallographically independent Cu(Ⅱ) ion, which is five-coordinated. Cu(Ⅱ) ions are bridged by L and bpe into 38-membered ring building units and these building units are extended into 2D layers. O-H…O hydrogen bonds exist between these layers, forming a 3D microporous supramolecular network. There are three kinds of metal coordination environments in complex 2. Each Zn(Ⅱ) ion is six-coordinated and bridged by bpe into 2D layer with cavity of about 13×26A2. Self-interpenetration occurs, but a 3D microporous supramolecular network is formed via hydrogen bonds between layers.
【Key words】 6-Hydroxypyridine-2-carboxylic acid; Micropore; Supramolecular complex;
- 【会议录名称】 中国化学会全国第十三届大环化学暨第五届超分子化学学术讨论会论文选集
- 【会议名称】中国化学会全国第十三届大环化学暨第五届超分子化学学术讨论会
- 【会议时间】2006-08
- 【会议地点】中国河南洛阳
- 【分类号】O641.4
- 【主办单位】中国化学会