Dual Exchange in PCN-333: A Facile Strategy to Chemically Robust Mesoporous Chromium Metal鈥揙rganic Framework with Functional Groups
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- 作者：Jihye Park ; Dawei Feng ; Hong-Cai Zhou
- 刊名：Journal of the American Chemical Society
- 出版年：2015
- 出版时间：September 16, 2015
- 年：2015
- 卷：137
- 期：36
- 页码：11801-11809
- 全文大小：582K
- ISSN：1520-5126
文摘
A facile preparation of a mesoporous Cr-MOF, PCN-333(Cr) with functional group, has been demonstrated through a dual exchange strategy, involving a sequential ligand exchange and metal metathesis process. After optimization of the exchange system, the functionalized PCN-333(Cr), N3鈥揚CN-333(Cr) shows well maintained crystallinity, porosity, as well as much improved chemical stability. Because of the exceptionally large pores (鈭?.5 nm) in PCN-333(Cr), a secondary functional moiety, Zn-TEPP with a size of 18 脜 脳 18 脜, has been successfully clicked into the framework. In this article, we have also analyzed kinetics and thermodynamics during dual exchange process, showing our attempts to interpret the exchange event in the PCN-333. Our findings not only provide a highly stable mesoporous Cr-MOF platform for expanding MOF-based applications, but also suggest a route to functionalized Cr-MOF which may have not been achievable through conventional approaches.