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Title: Exposed Equatorial Positions of Metal Centers via Sequential Ligand Elimination and Installation in MOFs

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.8b04886· OSTI ID:1475583

Here, metal–organic frameworks (MOFs) provide highly designable platforms to construct complex coordination architectures for targeted applications. Herein, we demonstrate that trans-coordinated metal centers with exposed equatorial positions can be placed in a MOF matrix. A Zr-based MOF, namely, PCN-160, was initially synthesized as a scaffold structure. Postsynthetic linker labilization was subsequently implemented to partially remove the original dicarboxylate linkers and incorporate pyridinecarboxylates. A pair of neighboring pyridyl groups was arranged at proper proximity within the framework to form trans-binding sites that accommodate different metal cations including Mn2+, Fe2+, Co2+, Ni2+, Cu2+, and Pd2+. Furthermore, the trans-coordinated Ni2+ sites in porous frameworks can be readily accessed by substrates along the equatorial plane, facilitating the catalysis as manifested by the superior activity in ethylene dimerization over that observed for a cis-chelated catalyst.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
A-0030; IIP-1632486; SC0001015; DGE-1252521; NPRP9-377-1-080; FE0026472
OSTI ID:
1475583
Journal Information:
Journal of the American Chemical Society, Vol. 140, Issue 34; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 63 works
Citation information provided by
Web of Science

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Quest for 9-connected robust metal–organic framework platforms based on [M 3 (O/OH)(COO) 6 (pyridine) 3 ] clusters as excellent gas separation and asymmetric supercapacitor materials journal January 2019