Auteur(s): Coquillat D., Bray C., O'Connor Emma, Brouillet Etienne, Meriguet Y., Consejo C., Ruffenach S., Nelson David, Faulds Karen, Teppe F., Torres Jeremie, Diakonova N.
Conference: 2022 47TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ 2022) (Delft, FR, 2022)
Actes de conférence: International Conference on Infrared Millimeter and Terahertz Waves, vol. p.1-2 (2022)
Texte intégral en Openaccess : 
Ref HAL: hal-03824965_v1
DOI: 10.1109/IRMMW-THz50927.2022.9895499
WoS: WOS:000865953000028
Exporter : BibTex | endNote
Résumé:
Terahertz time-domain spectroscopy has been used to investigate the vibrational spectra of polycrystalline sodium magnesium chlorophyllin - one of the natural derivatives of chlorophyll - over the temperature range 88 K–298 K. A number of well-resolved absorption peaks were observed in the frequency range 0.2–2.5 THz, which are interpreted as originating from mixed character of intramolecular and intermolecular vibration modes. As the temperature is increased, the observed absorption features resolve into broader peaks. The peak centered at 1.83 THz shifts towards higher frequencies, indicating that for this feature, significant intermolecular anharmonicity exist.