SUBPICOSECOND INFRARED-SPECTROSCOPY ON THE PHOTOISOMERIZATION OF THE PROTONATED SCHIFF-BASE OF ALL-TRANS RETINAL

Authors
HAMM P ZUREK M ROSCHINGER T PATZELT H OESTERHELT DS ZINTH W
Citation
P. Hamm et al., SUBPICOSECOND INFRARED-SPECTROSCOPY ON THE PHOTOISOMERIZATION OF THE PROTONATED SCHIFF-BASE OF ALL-TRANS RETINAL, Chemical physics letters, 268(1-2), 1997, pp. 180-186
Citations number
26
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
268
Issue
1-2
Year of publication
1997
Pages
180 - 186
Database
ISI
SICI code
0009-2614(1997)268:1-2<180:SIOTPO>2.0.ZU;2-6
Abstract
The light induced isomerisation reaction of the protonated Schiff base retinal with butylamine was studied in solution by subpicosecond infr ared spectroscopy in the spectral range of the C-C, C=C and C=NH+ stre tching modes. Upon heating by the internal S-1 --> S-0 conversion proc ess, vibrationally hot molecules are formed which are characterized by pronounced red-shifts of the C-C, the C=C and C=NH+ stretching modes. The frequency shifts can be used to estimate an intramolecular temper ature of the chromophore of 550 K immediately after the S-1 --> S-0 tr ansition.