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Decreased Electron Transfer Rates of Manganese Porphyrins with Conformational Distortion of the Macrocycle

✍ Scribed by Shunichi Fukuzumi; Ikuo Nakanishi; Jean-Michel Barbe; Roger Guilard; Eric Van Caemelbecke; Ning Guo; Karl M. Kadish

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 95 KB
Volume: 38
Category: Article
ISSN: 0044-8249
DOI: 10.1002/(sici)1521-3773(19990401)38:7<964::aid-anie964>3.0.co;2-o

No coin nor oath required. For personal study only.

✦ Synopsis

Slow electron transfer to manganese(iii) porphyrins results when the macrocycle deviates from planarity. This was demonstrated by measuring the kinetics of homogeneous electron transfer from a series of semiquinone radical anions to synthetic manganese porphyrins (shown schematically; R =H, Cl, F; R =H, F). Three of the four porphyrins studied have nonplanar macrocycles. These results could have implications for the role of manganese in biological electron transfer processes.

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