Primary photophysical and photochemical processes for hexachloroosmate(iv) in aqueous solution

Evgeni M. Glebov, Ivan P. Pozdnyakov, Svetlana G. Matveeva, Alexei A. Melnikov, Sergey V. Chekalin, Marina V. Rogozina, Vladislav V. Yudanov, Vjacheslav P. Grivin, Victor F. Plyusnin

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The photoaquation of the OsIVCl6 2- complex was studied by means of stationary photolysis, nanosecond laser flash photolysis and ultrafast kinetic spectroscopy. The OsIVCl5(OH)2- complex was found to be the only reaction product. The quantum yield of photoaquation is rather low and wavelength-dependent. No impact of redox processes on photoaquation was revealed. The total characteristic lifetime of the process is about 80 ps. Three intermediates were recorded in the femto- and picosecond time domains and assigned to different Os(iv) species. The nature of intermediates and possible mechanisms of photoaquation are discussed.

Original languageEnglish
Pages (from-to)220-227
Number of pages8
JournalPhotochemical and Photobiological Sciences
Volume16
Issue number2
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Coordination Complexes/chemistry
  • Kinetics
  • Lasers
  • Osmium/chemistry
  • Oxidation-Reduction
  • Photolysis/radiation effects
  • Spectrophotometry, Ultraviolet
  • Water/chemistry
  • SPIN-CROSSOVER
  • METHANOL
  • ELECTRON-TRANSFER SPECTRA
  • OSCL62
  • IRCL62-COMPLEX
  • EXCITED-STATES
  • SPECTROSCOPY
  • ULTRAFAST
  • DYNAMICS

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