Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (02): 101-106.doi: 10.3866/PKU.WHXB20010202

• ARTICLE • Previous Articles     Next Articles

Rapid-Mixing Stopped-Flow Spectra Studies on Water-soluble Manganese Porphyrin Enzyme-Mimic Systems

Li Zhen;Xia Chun-Gu   

  1. State Key Laboratory of Oxo Synthesis&Selective Oxidation,Lanzhou Institute of Chemical Physics,Chinese Academy of Science,Lanzhou 730000
  • Received:2000-05-16 Revised:2000-07-17 Published:2001-02-15
  • Contact: Xia Chun-Gu E-mail:cyxia@ns.lzb.ac.cn

Abstract: The reaction of watersoluble Manganese porphyrin complex,MnⅢ(TMPyP) with a variety of oxidants(mCPBA,KHSO5,NaOCl and H2O2) under ambient conditions at different pH was investigated by stoppedflow techniques.Oxomanganese(IV) porphyrin complex intermediate (2) was the main product at lower pH.Highvalent oxomanganese(V) porphyrin (1) was fully formed and subsequently decayed to oxoMn(Ⅳ) at higher pH.It was shown that oxomanganese(V) porphyrin was the reactive complex with reducing substrates.

Key words: Water-soluble manganese porphyrin complexes, Single oxygen donors,  Catalytic oxidation, Stopped-flow technique