Photoacoustic spectra and photovoltaic effect of flavins

R. Drabent, D. Fra̧ckowiak, Cz Jadzyn, S. Hotchandani, R. M. Leblanc

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Photoacoustic spectra and the kinetics of the photovoltaic effect, as well as action spectra of 10-formylmethylisoalloxazine, riboflavin, flavomononucleotide and the complexes of flavins with riboflavin-bound proteins, were measured. The spectral regions of high efficiency of thermal deactivation of flavin excitation were observed. In these regions there could be high absorption of some aggregates of dye or there could be some vibronic transitions characterized by efficient thermal deactivation. The aggregation of chromophores with proteins causes the increase in the photoacoustic signal and the change in the shape of the photoacoustic spectrum. The illumination of a sample by light, causing a high photoacoustic signal, leads to low efficiency of photopotential generation. This means that the process of electron transfer from the excited pigment to the semiconducting electrode is less efficient when thermal deactivation is higher.

Original languageEnglish (US)
Pages (from-to)25-28
Number of pages4
JournalBBA - General Subjects
Volume843
Issue number1-2
DOIs
StatePublished - Nov 22 1985
Externally publishedYes

Keywords

  • Flavin
  • Photoacoustic spectrum
  • Photovoltaic effect

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

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