Ligand dependence of magnetic spin effects on photooxidation of [Ru(bpy)3-n(CN)2n](+2-2n) type complexes

L. Fodor, Anikó Ülveczki, Attila Horváth, Ulrich E. Steiner

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Photoinduced electron transfer reaction from the series of [Ru(bpy)(3-n)(CN)2n](2+-2n) complexes (n=0, 1, 2) to methylviologen has been investigated using external magnetic field modulation in order to obtain relevant kinetic parameters for spin relaxation, backward electron transfer and cage escape of the geminate radical pair. The replacement of one bpy by two cyanide ligands results in an increase of the quenching rate constant and a decrease of the cage escape efficiency. The latter is decreased in a magnetic field and the sensitivity of this effect is weakened by introducing CN- ligands. From the analysis of the magnetic field dependence it can be inferred that with increasing number of CN- ligands, backward electron transfer rate and spin relaxation time in the geminate radical pair exhibit a moderate decrease but that the rate constant of cage escape decreases very strongly.

Original languageEnglish
Pages (from-to)133-141
Number of pages9
JournalInorganica Chimica Acta
Volume338
DOIs
Publication statusPublished - Oct 14 2002

Fingerprint

Photooxidation
photooxidation
Magnetic Fields
escape
electron transfer
Ligands
Electrons
Magnetic fields
ligands
Rate constants
magnetic fields
Cyanides
cyanides
Kinetic parameters
Relaxation time
Quenching
relaxation time
quenching
Modulation
modulation

Keywords

  • Electron transfer quenching
  • Magnetic field effects
  • Mixed ligand ruthenium(II) complexes

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Ligand dependence of magnetic spin effects on photooxidation of [Ru(bpy)3-n(CN)2n](+2-2n) type complexes. / Fodor, L.; Ülveczki, Anikó; Horváth, Attila; Steiner, Ulrich E.

In: Inorganica Chimica Acta, Vol. 338, 14.10.2002, p. 133-141.

Research output: Contribution to journalArticle

Fodor, L. ; Ülveczki, Anikó ; Horváth, Attila ; Steiner, Ulrich E. / Ligand dependence of magnetic spin effects on photooxidation of [Ru(bpy)3-n(CN)2n](+2-2n) type complexes. In: Inorganica Chimica Acta. 2002 ; Vol. 338. pp. 133-141.
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AU - Steiner, Ulrich E.

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