Preparation and photoinduced processes of ferric complexes containing fluoride and tetradentate salen-type ligands

• Autorzy: Sima J. , Mrazova J. , Kotocova A.
• Języki publikacji: EN

Abstrakty

EN

Tetradentate open-chain Schiff base ligands R-salen (R-salen are N,N'-ethylenebis(R-salicylideneiminato) dianions) and fluoride anions F(-) coordinate to the iron(III) central atom in methanol forming the complexes trans-[Fe(R-salen)(CH3OH)F]. The complexes are redox stable in the dark. Photoexcitation into their intraligand or ligand-to-metal charge transfer excited states leads to the photoreduction of Fe(III) to Fe(II), as a product of metanol oxidation the radical CH2OH was identified. The final products of the redox processes, Fe(II) and CH20, are formed in a 2:1 molar ratio. The efficiency of the photoredox processes is strongly wavelenght dependent and influenced by the peripheral groups R of the tetradentate ligands. A mechanism of deactivation processes is proposed and the influence of the peripheral groups R on the photoredox efficiency and electrochemical properties of the complexes is discussed.

Słowa kluczowe

EN

iron (III) complexes; Schiff base ligands; photoredox processes; peripheral group effects

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 9
• Strony: 2079--2086
• Opis fizyczny: Bibliogr. 16 poz., wykr.

Twórcy

autor

Sima J.

autor

Mrazova J.

autor

Kotocova A.