A Strategy for Trapping Molecular Guests in MOF-5 Utilizing Surface-Capping Groups
A Strategy for Trapping Molecular Guests in MOF-5 Utilizing Surface-Capping Groups
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DOI：
10.1021/acs.cgd.9b00818
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发表时间：
2019-10
影响因子：
3.8
通讯作者：
Rick A Homan;Dalton S. Hendricks;Thomas M. Rayder;U. S. Thein;Katherine J Fossum;Adriana P. Claudio Vázquez;Jingjing Yan;Ronald L. Grimm;Shawn C Burdette;John C. MacDonald
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作者：
Rick A Homan;Dalton S. Hendricks;Thomas M. Rayder;U. S. Thein;Katherine J Fossum;Adriana P. Claudio Vázquez;Jingjing Yan;Ronald L. Grimm;Shawn C Burdette;John C. MacDonald
我们开发了一种简单的策略，使用带有空间要求高的取代基的羧酸作为封端剂，将分子客体捕获在 MOF-5 内。我们证明，将三苯乙酸或二苯乙酸引入到负载结晶紫（CV）的 MOF-5 晶体表面上，可以通过堵塞孔的开口来防止 CV 逃逸。在本研究中，MOF-5 用四种羧酸和两种 3° 胺封端，并使用紫外可见光谱监测 CV 从封端 MOF 中的扩散，以评估取代基空间需求的变化如何影响 CV 的保留。
We have developed a simple strategy allowing molecular guests to be trapped within MOF-5 using carboxylic acids bearing sterically demanding substituents as capping reagents. We demonstrate that introducing triphenylacetic acid or diphenylacetic acid onto the surface of crystals of MOF-5 loaded with crystal violet (CV) prevents CV from escaping by blocking the openings of pores. In this study, MOF-5 was capped with four carboxylic acids and two 3° amines, and diffusion of CV out of capped MOFs was monitored using UV–vis spectroscopy to assess how variation in the steric demand of substituents affected retention of CV.