Manganese- and Cobalt-Based Coordination Networks as Promising Heterogeneous Catalysts for Olefin Epoxidation Reactions

We demonstrate the
synthesis of Mn2+- and Co2+-based coordination
networks using two Co3+-based metalloligands differing
by the position of the appended arylcarboxylate groups. The structural
analyses reveal topologically distinct networks with pores of variable
dimensions allowing facile diffusion of substrates and/or reagents.
All four networks function as heterogeneous catalysts for the olefin
epoxidation reactions using tert-butyl-hydroperoxide
without any requirement of solvent or additive. Control and optimization
experiments illustrate recyclable network-based catalysts that make
them attractive candidates for the “greener” oxidation
chemistry processes.