Consequences of Pore Polarity and Solvent Structure on Epoxide Ring-Opening in Lewis and Bronsted Acid Zeolites.

ABSTRACT: The structure of solvent molecules within zeolite pores influences the rates and selectivities of catalytic reactions by altering the free energies of reactive species. Here, we examine the consequences of these effects on the kinetics and thermodynamics of 1,2-epoxybutane (C₄H₈O) ring-opening with methanol (CH₃OH) in acetonitrile (CH₃CN) cosolvent over Lewis acidic (Zr-BEA) and Brønsted acidic (Al-BEA) zeolites of varying (SiOH) _x density. Despite ostensibly identical reaction mechanisms across materials, turnover rates depend differently on (SiOH) _x density between acid types. (SiOH) _x -rich Zr-BEA (Zr-BEA-OH) provides ∼10 times greater rates than a (SiOH) _x -poor material

SUBMITTER: Potts DS 

PROVIDER: S-EPMC11423312 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature