通过Cu (II) /4,4'-bpy协调聚合物的离子和多孔功能的框架工程
Shin-ichiro Noro1, Ryo Kitaura, Mitsuru Kondo
1Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
Journal of the American Chemical Society
|March 14, 2002
概括
新的多孔协调聚合物使用铜 (II) 离子,4,4′-双二联体和各种离子进行了合成. 这些材料表现出可调节的结构和动态离子交换特性,证明了对抗离子的框架控制.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学
- 超分子化学 超分子化学
背景情况:
- 多孔协调聚合物 (PCP) 为各种应用提供可调节的结构.
- 通过合理设计控制PCP的框架和属性是一个关键的挑战.
- 联盟在指导协调网络的组建和稳定性方面发挥着至关重要的作用.
研究的目的:
- 通过Cu (II) 离子,4,4'-双和不同框架调节离子的组合,合成和表征新型多孔协调聚合物.
- 研究这些材料的结构多样性和动态行为,以应对不同的离子成分.
- 探索对抗行动对PCP框架的形成和相互转换的影响.
主要方法:
- 协调聚合物的溶热合成.
- 单晶X射线衍射用于结构阐明.
- 粉末X射线衍射和热重力测量分析用于表征.
- 在现场转换研究,观察框架转换.
主要成果:
- 一系列新的3D和2D多孔协调聚合物已成功合成.
- 框架范围从强大的3D微孔网络到相互透的2D结构.
- 在水中浸泡时观察到结构转换或通过改变对抗离子 (例如,AF(6)(2-) 到PF(6)(-)).
- 演示了动态的离子交换特性和选择性框架转换,突出了离子模板组件.
结论:
- 框架构建器和框架调节器组件的合理选择允许控制多种PCP架构的合成.
- 阳离子显著影响Cu (II) 基协调聚合物的维度,相互透和动态特性.
- 这些发现为创造具有可调节性质的功能性多孔材料的设计原则提供了洞察力.
相关概念视频
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In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Coordination Number and Geometry
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Valence Bond Theory
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Tetrahedral Complexes
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Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
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The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
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