同人体金属有机框架中的缺失链接器缺陷:调整基质分离能力
Benjamin Slater1,2, Zeru Wang1, Shanxue Jiang1
1Barrer Centre, Department of Chemical Engineering, Imperial College London , London SW7 2AZ, United Kingdom.
Journal of the American Chemical Society
|November 29, 2017
概括
将缺陷引入同质金属有机框架 (MOF) 显著增强了反体分离. 这项研究表明,使用有缺陷的ZnBLD MOF,1-乙醇的反体过量增加了35%.
科学领域:
- 材料科学
- 化学工程
- 晶体学
背景情况:
- 由于体具有相同的性质,因此体的分离具有挑战性.
- 同人体金属有机框架 (MOF) 显示出对分离的希望.
- MOF中的结构缺陷可能会改变孔隙结构和特性.
研究的目的:
- 调查缺失链接器缺陷对同质性MOF的分离能力的影响.
- 优化缺陷度以改善度.
- 将MOF的结构缺陷与分离性能关联起来.
主要方法:
- 合成一个同体性MOF,[Zn2{\bdc}{\l-lac}{\dmf}] (ZnBLD),控制缺失链接器缺陷.
- 单碳酸连接剂 (l-乳酸) 度的变化和酸作为调节剂的使用.
- 使用FTIR,TGA,1H NMR,ICP和PXRD进行表征.
- 分析粉末X射线衍射 (PXRD) 半最大宽度 (fwhm) 以评估缺陷水平.
主要成果:
- 与无缺陷框架相比,有缺陷的 ZnBLD MOF 对1-乙醇的反体过量增加了 35%.
- 将 Zn2+ 调整为 l- 乳酸比率影响了缺陷度和酶分离.
- 单碳酸连接物的度较高导致同结构MOF的fwhm值增加,表明缺陷水平较高.
结论:
- 将缺失的链接器缺陷引入同质性MOF是一种有效的策略,以增强酶分离.
- 缺陷的度,由连接物比率控制,直接影响度过多.
- PXRD fwhm分析可以作为一种有价值的工具,用于将结构缺陷与抗分离效率联系起来.
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