%0 Conference Proceedings %T Investigating the low-frequency vibrations of chlorophyll derivatives using terahertz spectroscopy %+ Laboratoire Charles Coulomb (L2C) %+ University of Strathclyde [Glasgow] %+ Institut d’Electronique et des Systèmes (IES) %+ Modélisation et Spectroscopie THz (MOST) %A Coquillat, Dominique %A O'Connor, Emma %A Brouillet, Etienne %A Meriguet, Yoann %A Bray, Cédric %A Nelson, David J. %A Faulds, Karen %A Torres, Jeremie %A Diakonova, Nina %< avec comité de lecture %Z L2C:21-133 %( Proceedings Volume 11827, Terahertz Emitters, Receivers, and Applications XII; 118270F (2021) %B SPIE Optical Engineering + Applications, 2021, San Diego, California, United States %C San Diego, United States %P 118270F %8 2021-08-02 %D 2021 %R 10.1117/12.2593589 %K TerahertzChlorophyllintermolecular vibrational modes %Z Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]Conference papers %X 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. %G English %2 https://hal.science/hal-03406165/document %2 https://hal.science/hal-03406165/file/ManuscriptSPIE-Final-WithInsets%20EVB.pdf %L hal-03406165 %U https://hal.science/hal-03406165 %~ CNRS %~ IES %~ L2C %~ MIPS %~ UNIV-MONTPELLIER %~ UM-2015-2021