title: Temperature-dependent Photodegradation in UV-resonance Raman Spectroscopy.
abstract: Temperature-dependent photodegradation during UV-resonance Raman spectroscopy was investigated. Photodegradation was quantitatively probed by monitoring the temporal evolution of UV-resonance Raman spectra obtained from bacteriochlorophyll (BChl) showing, resonance effect at a 355-nm excitation wavelength. At 80 K, the molecular photodecomposition rate was 5-times lower than that at room temperature. The decomposition rates of BChl were analyzed by the Arrhenius formula, indicating that the mechanism of photodegradation includes a thermal process having an activation energy of 1.4 kJ/mol.
authors.affiliation: Department of Applied Physics, Osaka University.
authors.forename: Hikaru
authors.initials: H
authors.lastname: Yoshino
authors.forename: Yuika
authors.initials: Y
authors.lastname: Saito
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Kumamoto
authors.forename: Atushi
authors.initials: A
authors.lastname: Taguchi
authors.forename: Prabhat
authors.initials: P
authors.lastname: Verma
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kawata
mesh_terms: D025541:Bacteriochlorophyll A / Q000737:chemistry*; D015394:Molecular Structure; D010782:Photolysis; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014466:Ultraviolet Rays
chemical_list: D025541:Bacteriochlorophyll A