Ligand modification transforms a catalase mimic into a water oxidation catalyst.
Ligand modification transforms a catalase mimic into a water oxidation catalyst.
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DOI:
10.1002/anie.201402407
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发表时间:
2014-09-08
影响因子:
16.6
通讯作者:
Smith, Jeremy M.
中科院分区:
文献类型:
--
作者:
Lee, Wei-Tsung;Munoz, Salvador B.;Dickie, Diane A.;Smith, Jeremy M.
The catalytic reactivity of the high-spin Mn(II) pyridinophane complexes [(Py2NR2)Mn(H2O)2]2+ (R = H, Me, tBu) towards O2 formation is reported. With small macrocycle N-substituents (R = H, Me), the complexes catalytically disproportionate H2O2 in aqueous solution. While this catalysis is shut down with a bulky substituent (R = tBu), the complex becomes active for electrocatalytic H2O oxidation in aqueous solution. Control experiments are in support of a homogeneous molecular catalyst and preliminary mechanistic studies suggest the catalyst is mononuclear. This ligand-controlled switch in catalytic reactivity has implications for the design of new manganese-based water oxidation catalysts.
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