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A Robust Mn Catalyst for H 2 O 2 Disproportionation in Aqueous Solution
Author(s) -
Lee WeiTsung,
Xu Song,
Dickie Diane A.,
Smith Jeremy M.
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201300184
Subject(s) - disproportionation , chemistry , catalysis , aqueous solution , catalytic cycle , turnover number , kinetic energy , robustness (evolution) , inorganic chemistry , organic chemistry , biochemistry , physics , quantum mechanics , gene
The pyridinophane complex [Mn(Py 2 N 2 )(H 2 O) 2 ] 2+ catalyses the disproportionation of H 2 O 2 in aqueous solution over a wide pH range. Kinetic investigations reveal an induction period, which is proposed to involve the formation of a hydroperoxo intermediate, as well as evidence for catalyst self‐inhibition. A catalytic cycle involving mononuclear intermediates has been proposed. Spectroscopic investigations under turnover conditions are consistent with this proposal and show that the resting state of the catalyst is a mononuclear Mn II complex. The robustness of the catalyst is evidenced by its ability to achieve turnover numbers of 58000 in aqueous solution.