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Complexation of hypocrellins and bivalent metals and one‐electron reduction of the complexes with electron donor
Author(s) -
An JingYi,
Tian Fei,
Hu YiZhen,
Jiang LiJin
Publication year - 1993
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19930110607
Subject(s) - chemistry , bivalent (engine) , chelation , metal , spectroscopy , electron donor , nicotinamide , semiquinone , ultraviolet visible spectroscopy , electron paramagnetic resonance , photochemistry , inorganic chemistry , redox , organic chemistry , catalysis , enzyme , physics , nuclear magnetic resonance , quantum mechanics
The complexation of HA (or HB) with bivalent metals was examined by UV‐Vis and NMR spectroscopy, and all of the complexes obtained have a metal‐ligand ratio of 1:1. The photoinduced reduction of the complexes of HA‐Zn 2+ and HA‐Mg 2+ (or HB‐Zn 2+ , HB‐Mg 2+ ) in the presence of 1‐benzyl‐1,4‐dihydro‐nicotinamide as the electron donor was investigated by UV‐Vis and ESR spectroscopy. The studies demonstrated that illumination of the complexes of HA(HB)‐Zn 2+ and HA(HB)‐Mg 2+ led to the accumulation of the chelated semiquinone radical anions.