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Cover Feature: A Mechanistic Dichotomy in Two‐Electron Reduction of Dioxygen Catalyzed by N , N ’‐Dimethylated Porphyrin Isomers (Chem. Eur. J. 46/2020)
Author(s) -
Suzuki Wataru,
Kotani Hiroaki,
Ishizuka Tomoya,
Kojima Takahiko
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202003163
Subject(s) - porphyrin , catalysis , cover (algebra) , chemistry , metal , photochemistry , homogeneous , reduction (mathematics) , reaction mechanism , medicinal chemistry , organic chemistry , physics , mechanical engineering , geometry , mathematics , engineering , thermodynamics
Selective two‐electron reduction of O 2 to H 2 O 2 has been achieved by nonplanar N , N ’‐dimethylated porphyrin isomers as organocatalysts, showing the highest TON among homogeneous metal‐free catalysts. Hydrogen bonding between pyrrolic protons of reduced porphyrinoids and O 2 plays an important role to control the reaction mechanism in catalytic O 2 reduction. The cover art describes different mechanisms of the O 2 reduction by the two isomers on the background showing shining Mt. Tsukuba in the sunset. More information can be found in the Full Paper by T. Kojima et al. on page 10480.