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

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Coquillat, Dominique and O'Connor, Emma and Brouillet, Etienne V. and Meriguet, Yoann and Bray, Cedric and Nelson, David J. and Faulds, Karen and Torres, Jeremie and Dyakonova, Nina; Razeghi, Manijeh and Baranov, Alexei N., eds. (2021) Investigating the low-frequency vibrations of chlorophyll derivatives using terahertz spectroscopy. In: Terahertz Emitters, Receivers, and Applications XII. Proceedings of SPIE - The International Society for Optical Engineering . SPIE, USA. ISBN 9781510644922 (https://doi.org/10.1117/12.2593589)

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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.

ORCID iDs

Coquillat, Dominique, O'Connor, Emma, Brouillet, Etienne V. ORCID logoORCID: https://orcid.org/0000-0001-5854-1983, Meriguet, Yoann, Bray, Cedric, Nelson, David J. ORCID logoORCID: https://orcid.org/0000-0002-9461-5182, Faulds, Karen ORCID logoORCID: https://orcid.org/0000-0002-5567-7399, Torres, Jeremie and Dyakonova, Nina; Razeghi, Manijeh and Baranov, Alexei N.
CORE (COnnecting REpositories)