Spectroscopic and kinetic evidence for redox cycling, catalase and degradation activities of Mn(III)(TPPS) in a basic aqueous peroxide medium.

Abstract

Mn(III)(TPPS) was found to react rapidly with hydrogen peroxide in basic aqueous solution to form intermediate (TPPS)Mn(V)[double bond, length as m-dash]O and (TPPS)Mn(IV)[double bond, length as m-dash]O species which, in the presence of excess H2O2, are reduced fully back to Mn(III)(TPPS) with clear evidence for redox cycling of Mn(III)(TPPS). The system shows very strong catalase and degradation activities.