Reversible conversion of valence-tautomeric copper metal–organic frameworks dependent single-crystal-to-single-crystal oxidation/reduction: a redox-switchable catalyst for C–H bonds activation reaction

Abstract

Upon single-crystal-to-single-crystal (SCSC) oxidation/reduction, reversible structural transformations take place between the anionic porous zeolite-like Cu^I framework and a topologically equivalent neutral Cu^ICu^II mixed-valent framework. The unique conversion behavior of the Cu^I framework endowed it as a redox-switchable catalyst for the direct arylation of heterocycle C–H bonds.