Ultrafast relaxation kinetics of the dark S1 state in all-trans-β-carotene explored by one- and two-photon pump–probe spectroscopy

Kosumi, D., Abe, K., Karasawa, H., Fujiwara, M., Cogdell, R.J. , Hashimoto, H. and Yoshizawa, M. (2010) Ultrafast relaxation kinetics of the dark S1 state in all-trans-β-carotene explored by one- and two-photon pump–probe spectroscopy. Chemical Physics, 373(1-2), pp. 33-37. (doi: 10.1016/j.chemphys.2009.12.013)

Abstract

Femtosecond one-and two-photon pump-probe dispersive spectroscopic measurements have been applied to the investigation of the vibrational relaxation kinetics of the dark S-1 (2(1)A(g)(-)) state in beta-carotene, combining a higher sensitive detection system with tunable visible and infrared excitation pulses. The two-photon excitation measurements enable the preferential detection of the dark S-1 state. The tunable infrared excitation pulses allowed selective excitation to a different vibrational level of S-1. The S-1 dynamics at early delay times depend strongly on excitation energy. A dependence of the initial S-1 dynamics on excitation energy is discussed in term of the vibrational relaxation of S-1. (C) 2009 Elsevier B. V. All rights reserved

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Cogdell, Professor Richard
• Authors: Kosumi, D., Abe, K., Karasawa, H., Fujiwara, M., Cogdell, R.J., Hashimoto, H., and Yoshizawa, M.
• College/School: College of Medical Veterinary and Life Sciences > School of Molecular Biosciences
• Journal Name: Chemical Physics
• ISSN: 0301-0104