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

被引：316

作者：

Walther, M ^{[1
]}

Fischer, B ^{[1
]}

Schall, M ^{[1
]}

Helm, H ^{[1
]}

Jepsen, PU ^{[1
]}

机构：

[1] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 332卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(00)01271-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：389 / 395

页数：7

共 16 条

[1] Low-frequency vibrations of all-trans-retinal:: Far-infrared and Raman spectra and density functional calculations [J].