Bell-shaped Dependence of the Quantum Yield of Fe(II) Formation in Irradiated Methanolic Solutions of Iron(III) Azido Methanolic Solutions of Iron(III) Azido Complexes with N, N'-Ethylenebis(benzoylacetoneiminato) Schiff Base Derivatives

• Autorzy: Šima J. , Horváthová L.
• Języki publikacji: EN

Abstrakty

EN

The complexes trans-[Fe(4-R-benacen)(CH3OH)N3], where 4-R-benacen2- are tetradentate open-chain N2O2-Schiff base N,N'-ethylenebis(4-R-benzoylacetoneiminato) ligands (R =H, Cl, Br,OCH3, CH3) are redox stable in the dark. Under the impact of ultraviolet and/or visible radiation they undergo photochemical reactions, yielding Fe(II) and formaldehyde CH2O as final products. As an intermediate, _CH2OH radicals were identified by EPR spin trapping technique. The efficiency of the photoredox processes, expressed by the quantum yield of Fe(II) formation, Fi Fe(II) is strongly wavelength dependent and influenced by the peripheral groups R of the tetradentate ligands. It was found, that along with a frequently observed decrease in the quantum yield with decreasing the photon energy of incident radiation (Fi Fe(II) at 313 nm < Fi Fe(II) at 366 nm

Słowa kluczowe

EN

photolysis; iron (III) complexes; azide decomposition; mechanism

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 12
• Strony: 1857--1865

Twórcy

autor

Šima J.

• Department of Inorganic Chemistry, Slovak Technical University,Radlinského 9, 81237 Bratislava, Slovakia

autor

Horváthová L.

• Department of Inorganic Chemistry, Slovak Technical University,Radlinského 9, 81237 Bratislava, Slovakia

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