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Photoredox Properties of Iron(III) Fluoro Complexes Containing Tetradentate Open‐Chain N 2 O 2 Ligands
Author(s) -
Šima Jozef,
Mrázová Juliana,
Kotočová Adela
Publication year - 1999
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199900137
Subject(s) - chemistry , redox , ligand (biochemistry) , methanol , schiff base , metal , photochemistry , irradiation , crystallography , medicinal chemistry , inorganic chemistry , organic chemistry , biochemistry , physics , receptor , nuclear physics
Tetradentate open‐chain Schiff base N 2 O 2 ‐ligands of acacen, benacen or salen type and fluoride anions F − coordinate to the iron(III) central atom in methanol forming the complexes [Fe(N 2 O 2 )(CH 3 OH)F]. The complexes do not undergo spontaneous redox changes when kept in the dark. Their irradiation into intraligand or ligand‐to‐metal charge transfer bands causes the photoreduction of Fe(III) to Fe(II) associated with oxidation of metanol to its radical CH 2 OH. The final products of the primary photoredox and secondary dark redox processes, Fe(II) and CH 2 O, are formed in a 2:1 molar ratio. The efficiency of the axial methanol ligand photooxidation is strongly wavelength dependent and influenced by the peripheral groups R of the tetradentate ligands