一个动态多孔框架的发明:基于胺-胺键连接的正方形网格的合作性客吸附
Kazuhiro Uemura1, Susumu Kitagawa, Kôichi Fukui
1Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Journal of the American Chemical Society
|March 25, 2004
概括
合成了具有胺基组的新型柔性多孔协调聚合物. 一种材料在乙吸附时表现出可逆的无形晶体转化,显示出动态的多孔框架.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 协调聚合物 (CPs) 是具有可调节结构和特性的材料.
- 胺基团可以参与结,影响CP框架组装.
- 灵活的CP提供了动态结构反应的潜力.
研究的目的:
- 合成和描述新型的柔性多孔协调聚合物,其中包含胺功能.
- 研究这些材料的结构行为和客吸附特性.
- 探索胺含有CP的刺激响应行为的潜力.
主要方法:
- 使用带有胺间隔器的双二基连接物合成协调聚合物.
- 使用X射线衍射进行结构性表征.
- 气体吸附/脱附研究,以探测孔隙性和框架动态.
- 热力学分析使用温度依赖的等热体来对客体吸附的热力学分析.
主要成果:
- 三种协调聚合物,[Co(NO(3)) 23-pna) 2) n) 1,[Co(Br) 23-pna) 2]n) 2,和[Co(NCS) 24-peia) 2].4Me2CO]n) 3子集4Me2CO),已经成功合成.
- 化合物3在乙 (Me(2) CO) 吸附和脱附过程中表现出独特的无形晶体结构转化,保持其二维图案框架.
- Me(2) CO 的吸附同热度显示了值压力,表明了门打开效应.
- 确定Me(2) CO的吸附热量为-25kJ/mol,与乙的蒸发度相当.
结论:
- 灵活的CP中的胺基组可以促进动态的多孔框架和刺激响应行为.
- 在化合物3中观察到的无形转化为晶体突出显示了其作为响应性材料的潜力,用于捕获客分子.
- 门压力现象和吸附度提供了关于动态框架内主机-客户互动的见解.
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