Resonance Raman spectroscopy study of protonated porphyrin

A. Gorski*, A. Starukhin, S. Stavrov, S. Gawinkowski, J. Waluk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Resonance Raman microscopy was used to study the resonance Raman scattering of the diacid (diprotonated form) of free-base porphyrin (21H,23H–porphine) in a crystal powder and KBr pellets. Intensive lines in the spectral range between 100 ÷ 1000 cm− 1 have been detected and assigned as spectral manifestation of out-of-plane modes. The Raman spectra were simulated by means of DFT methods and compared with the experimental data. It is evident from experimental and theoretical results that the activation of out-of-plane modes arises from saddle distortion of the porphyrin macrocycle upon formation of its diprotonated form.

Original languageEnglish
Pages (from-to)350-355
Number of pages6
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
StatePublished - 15 Feb 2017


  • DFT analysis and modeling
  • Distortion of porphyrin macrocycle
  • Out-of-plane modes
  • Protonated porphyrin
  • Raman microscopy


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