title: Solvent-Assisted Metal Metathesis: A Highly Efficient and Versatile Route towards Synthetically Demanding Chromium Metal-Organic Frameworks.
abstract: 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 FeIII-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 FeIIIanalogues 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.
authors.affiliation: Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, China.
authors.forename: Jun-Hao
authors.initials: JH
authors.lastname: Wang
authors.affiliation: Institute of Molecular Science, Shanxi University, Taiyuan, 030006, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Shantou University, Shantou, 515063, China.
authors.forename: Mian
authors.initials: M
authors.lastname: Li
authors.affiliation: Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, China.
authors.forename: Shu
authors.initials: S
authors.lastname: Yan
authors.affiliation: College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.affiliation: Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, China.
authors.forename: Xian-Ming
authors.identifier: 0000-0002-8809-3402
authors.initials: XM
authors.lastname: Zhang
keywords: chromium; metal metathesis; metal-organic frameworks; postsynthetic modifications