Multidimensional spectroscopy of β-carotene: Vibrational cooling in the excited state

被引：42

作者：

Buckup, Tiago ^{[1
]}

Hauer, Juergen ^{[1
]}

Moehring, Jens ^{[1
]}

Motzkus, Marcus ^{[1
]}

机构：

[1] Univ Marburg, Fachbereich Phys Chem, D-35043 Marburg, Germany

来源：

ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS | 2009年 / 483卷 / 02期

关键词：

Vibrational cooling; Four wave mixing; DFWM; Pump-DFWM; Multidimensional spectroscopy; Raman; Vibrational coherence; INTERNAL-CONVERSION; TRANSIENT ABSORPTION; 2-PHOTON EXCITATION; ULTRAFAST DYNAMICS; RAMAN-SPECTROSCOPY; S-1; STATE; MOLECULES; KINETICS; SPECTRA; SINGLET;

D O I：

10.1016/j.abb.2008.10.031

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Pump-degenerate four wave mixing (Pump-DFWM) is used for investigating the vibrational dynamics in the excited state of beta-carotene in solution. In this 2D technique, an initial PUMP pulse promotes the system to the excited state, which is then probed by the Succeeding DFWM sequence. We focus Particularly on the internal conversion between the S-2 and S-1 state with high temporal and spectral resolution. The frequency shift of the excited state vibrations is measured and is explained as mode-specific vibrational cooling. Our results suggest an internal conversion in a time range between 260 and 500 fs without ally intermediate states. (C) 2008 Elsevier Inc. All rights reserved.

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收藏

页码：219 / 223

页数：5

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