1. Charge‐Separated and Lewis Paired Metal–Organic Framework for Anion Exchange and CO2 Chemical Fixation.
- Author
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Thapa, Sheela, Meng, Lingyao, Hettiarachchi, Eshani, Bader, Yousef K., Dickie, Diane A., Rubasinghege, Gayan, Ivanov, Sergei A., Vreeland, Erika C., and Qin, Yang
- Subjects
LEWIS pairs (Chemistry) ,METAL-organic frameworks ,CHEMICAL reactions ,ANIONS ,LEWIS bases ,ION-permeable membranes ,PYRAZOLYL compounds - Abstract
Charge‐separated metal–organic frameworks (MOFs) are a unique class of MOFs that can possess added properties originating from the exposed ionic species. A new charge‐separated MOF, namely, UNM‐6 synthesized from a tetrahedral borate ligand and Co2+ cation is reported herein. UNM‐6 crystalizes into the highly symmetric P43n space group with fourfold interpenetration, despite the stoichiometric imbalance between the B and Co atoms, which also leads to loosely bound NO3− anions within the crystal structure. These NO3− ions can be quantitatively exchanged with various other anions, leading to Lewis acid (Co2+) and Lewis base (anions) pairs within the pores and potentially cooperative catalytic activities. For example, UNM‐6‐Br, the MOF after anion exchange with Br− anions, displays high catalytic activity and stability in reactions of CO2 chemical fixation into cyclic carbonates. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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