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

Autor:	Hiroshi Karasawa, Hideki Hashimoto, K. Abe, Richard J. Cogdell, Daisuke Kosumi, Masayuki Yoshizawa, Masazumi Fujiwara
Rok vydání:	2010
Předmět:	Two-photon excitation microscopy Chemistry Infrared Excited state Two-dimensional infrared spectroscopy Femtosecond Vibrational energy relaxation General Physics and Astronomy Physical and Theoretical Chemistry Atomic physics Spectroscopy Excitation
Zdroj:	Chemical Physics. 373:33-37
ISSN:	0301-0104
Popis:	Femtosecond one- and two-photon pump–probe dispersive spectroscopic measurements have been applied to the investigation of the vibrational relaxation kinetics of the dark S1 (21 A g - ) state in β-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 S1 state. The tunable infrared excitation pulses allowed selective excitation to a different vibrational level of S1. The S1 dynamics at early delay times depend strongly on excitation energy. A dependence of the initial S1 dynamics on excitation energy is discussed in term of the vibrational relaxation of S1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ed38bdeae41bb49cebfd219bc886a77c https://doi.org/10.1016/j.chemphys.2009.12.013 Zobrazit plný text záznamu Full Text from ScienceDirect