Far-infrared vibrational spectra of all-trans, 9-cis and 13-cis retinal measured by THz time-domain spectroscopy

M. Walther, B. Fischer, M. Schall, H. Helm, Peter Uhd Jepsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Low-frequency torsional vibration modes of the conjugated polyene chain of the biologically important chromophore retinal are of major relevance when studying its photoisomerization dynamics. We present absorptivity and dispersion spectra of three different retinal isomers in the far-infrared region between 10 and 100 cm(-1) (0.3-3.0 THz) measured by terahertz time-domain spectroscopy at 298 and 10 K. At low temperatures the observed broad absorption bands resolve into narrow peaks correlating to torsional modes of the molecule. Comparison of the absorption spectra of different retinal isomers enables the approximate localization of the modes within the molecule. Experimental linewidths and transition strengths are reported. (C) 2000 Elsevier Science B.V. All rights reserved.
Original languageEnglish
JournalChemical Physics Letters
Volume332
Issue number3-4
Pages (from-to)389-395
Number of pages7
ISSN0009-2614
DOIs
Publication statusPublished - 22 Dec 2000
Externally publishedYes

Fingerprint Dive into the research topics of 'Far-infrared vibrational spectra of all-trans, 9-cis and 13-cis retinal measured by THz time-domain spectroscopy'. Together they form a unique fingerprint.

Cite this