Intramolecular Hydrogen Bonding Enhances Stability and Reactivity of Mononuclear Cupric Superoxide Complexes.
Intramolecular Hydrogen Bonding Enhances Stability and Reactivity of Mononuclear Cupric Superoxide Complexes.
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DOI:
10.1021/jacs.8b04671
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发表时间:
2018-07-25
影响因子:
15
通讯作者:
Karlin KD
中科院分区:
文献类型:
--
作者:
Bhadra M;Lee JYC;Cowley RE;Kim S;Siegler MA;Solomon EI;Karlin KD
[(L)CuII(O2•−)]+ (i.e., cupric-superoxo) complexes, as the first and/or key reactive intermediates in (bio)chemical Cu-oxidative processes, including in the monooxygenases PHM and DβM, have been systematically stabilized by intramolecular hydrogen bonding within a TMPA ligand-based framework. Also, gradual strengthening of ligand-derived H-bonding dramatically enhances the [(L)CuII(O2•−)]+ reactivity toward hydrogen-atom abstraction (HAA) of phenolic O−H bonds. Spectroscopic properties of the superoxo complexes and their azido analogues, [(L)CuII(N3−)]+, also systematically change as a function of ligand H-bonding capability.
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