Investigating the low-frequency vibrations of chlorophyll derivatives using terahertz spectroscopy

Dominique Coquillat, Emma O'Connor, Etienne V. Brouillet, Yoann Meriguet, Cedric Bray, David J. Nelson, Karen Faulds, Jeremie Torres, Nina Dyakonova

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

The terahertz absorption spectra of sodium magnesium chlorophyllin (Chl-Mg-Na) and sodium copper chlorophyllin (Cu-Chl), two major members of the chlorophyll derivative family, have been measured in the range 0.2-3.0 THz (6.6-100 cm-1), at room temperature. Additionally, surface-enhanced Raman scattering spectroscopy was used to supplement data in the higher frequency range. The capability of terahertz spectroscopy for quantitative characterization of Chl-Mg-Na intermolecular vibrations was investigated and the sensitivity of the 1.82-THz feature with degree of hydration by changes in the molecular environment was examined. For Cu-Chl derivative, a broad feature was observed around 1.8 THz which currently hinders clear Cu-Chl identification and quantification.

Original languageEnglish
Title of host publicationTerahertz Emitters, Receivers, and Applications XII
EditorsManijeh Razeghi, Alexei N. Baranov
Place of PublicationBellingham, Washington
Number of pages4
ISBN (Electronic)9781510644922
DOIs
Publication statusPublished - 1 Aug 2021
Externally publishedYes
EventTerahertz Emitters, Receivers, and Applications XII 2021 - San Diego, United States
Duration: 1 Aug 20215 Aug 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11827
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceTerahertz Emitters, Receivers, and Applications XII 2021
Country/TerritoryUnited States
CitySan Diego
Period1/08/215/08/21

Keywords

  • chlorophyll
  • intermolecular vibrations
  • mass spectroscopy
  • sodium copper chlorophyllin
  • sodium magnesium chlorophyllin
  • surface-enhanced Raman spectroscopy
  • terahertz time-domain spectroscopy

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