Abstract − Analytical Sciences, 31(5), 451 (2015).
Temperature-dependent Photodegradation in UV-resonance Raman Spectroscopy
Hikaru YOSHINO,* Yuika SAITO,* Yasuaki KUMAMOTO,** Atushi TAGUCHI,* Prabhat VERMA,* and Satoshi KAWATA*
*Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
**Near-field Nanophotonics Research Team, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
**Near-field Nanophotonics Research Team, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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.
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