Stark absorption spectroscopy of peridinin and allene-modified analogues

Kusumoto, T., Horibe, T., Kajikawa, T., Hasegawa, S., Iwashita, T., Cogdell, R.J. , Birge, R. R., Frank, H. A., Katsumura, S. and Hashimoto, H. (2010) Stark absorption spectroscopy of peridinin and allene-modified analogues. Chemical Physics, 373(1-2), pp. 71-79. (doi:10.1016/j.chemphys.2010.01.018)

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Publisher's URL: http://dx.doi.org/10.1016/j.chemphys.2010.01.018

Abstract

Stark absorption spectra of peridinin (Per) and five allene-modified analogues and their angular dependence as a function of an externally applied electric field were measured in methyl methacrylate polymer at 77 K. In all cases, the energetically lowest absorption band has a significant change of static dipole-moment upon photoexcitation (Lambda mu). In particular, Per has the largest value of |Lambda mu|. The angles between Delta mu and the transition dipole-moment of all the analogues were determined. It is suggested that the allene group in Per plays a key role as the electron donor in the charge transfer process following photoexcitation. The results of MNDO-PSDCI calculations support this idea.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cogdell, Professor Richard
Authors: Kusumoto, T., Horibe, T., Kajikawa, T., Hasegawa, S., Iwashita, T., Cogdell, R.J., Birge, R. R., Frank, H. A., Katsumura, S., and Hashimoto, H.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:Chemical Physics
ISSN:0301-0104

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