Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
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Temperature-dependent Photodegradation in UV-resonance Raman Spectroscopy
Hikaru YOSHINOYuika SAITOYasuaki KUMAMOTOAtushi TAGUCHIPrabhat VERMASatoshi KAWATA
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2015 Volume 31 Issue 5 Pages 451-454

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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.

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© 2015 by The Japan Society for Analytical Chemistry
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