Resonance Raman spectroelectrochemistry of bacteriochlorophyll and bacteriochlorophyll cation radical

Therese M. Cotton*, Richard P. Van Duyne

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The newly developed technique of resonance Raman spectroelectrochemistry (RRSE) is applied to the study of the radical ion species involved in the primary photochemistry of photosynthesis. By means of controlled potential coulometry combined with resonance Raman spectroscopic detection, the vibrational spectrum of the bacteriochlorophyll a cation radical (BChl+·) has been obtained and compared with the corresponding spectrum of the parent molecule. The cation radical spectrum is significantly different from the neutral spectrum both in band frequencies and intensities. These results suggest that RR vibrational spectra may provide a new means of identifying and kinetically monitoring radical ion formation both in photosynthetic model systems and in vivo.

Original languageEnglish (US)
Pages (from-to)424-433
Number of pages10
JournalBiochemical and Biophysical Research Communications
Volume82
Issue number2
DOIs
StatePublished - May 30 1978

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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