Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 23, Pages 6478-6482Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201701217
Keywords
chromium; metal metathesis; metal-organic frameworks; postsynthetic modifications
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Funding
- NSFC [21602127]
- Shanxi University [231545009]
- Scientific and Technological Innovation Programs of Shanxi Province [206548901022]
- Natural Science Foundation for Young Scientists of Shanxi Province [2015021041]
- Plan for 10000 Talents in China
- Sanjin Scholarship
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Chromium(III)-based metal-organic frameworks (Cr-MOFs) are very attractive in a wide range of investigations because of their robustness and high porosity. However, reports on Cr-MOFs are scarce owing to the difficulties in their direct synthesis. Recently developed postsynthetic routes to obtain Cr-MOFs suffered from complicated procedures and a lack of general applicability. Herein, we report a highly efficient and versatile strategy, namely solvent-assisted metal metathesis, to obtain Cr-MOFs from a variety of Fe-III-MOFs, including several well-known MOFs and a newly synthesized one, through judicious selection of a coordinating solvent. The versatility of this strategy was demonstrated by producing Cr-MIL-100, Cr-MIL-142A/C, Cr-PCN-333, and Cr-PCN-600 from their Fe-III analogues and Cr-SXU-1 from a newly synthesized MOF precursor, Fe-SXU-1, in acetone as the solvent under very mild conditions. We have thus developed a general approach for the preparation of robust Cr-MOFs, which are difficult to synthesize by direct methods.
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