Colorimetric Metal-Free Detection of Carbon Monoxide: Reversible CO Uptake by a BNB Frustrated Lewis Pair.

ABSTRACT: We report two BNB-type frustrated Lewis pairs which feature an acceptor-donor-acceptor functionalized cavity, and which differ in the nature of the B-bound fluoroaryl group (C₆ F₅ vs. C₆ H₃ (CF₃ )₂ -3,5, Ar^f ). These receptor systems are capable of capturing gaseous CO, and in the case of the -BAr^f ₂ system this can be shown to occur in reversible fashion at/above room temperature. For both systems, the binding event is accompanied by migration of one of the aryl substituents to the electrophilic carbon of the CO guest. Experiments utilizing an additional equivalent of P^t Bu₃ allow the initially formed (non-migrated) CO adduct to be identified and trapped (via demethylat

SUBMITTER: Zheng X 

PROVIDER: S-EPMC8362209 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature