Dynamics of a photo-excited state in polydiacetylene studied by femtosecond mid-infrared absorption spectroscopy

Authors
Sugita, A Kobayashi, T
Citation
A. Sugita et T. Kobayashi, Dynamics of a photo-excited state in polydiacetylene studied by femtosecond mid-infrared absorption spectroscopy, CHEM P LETT, 346(1-2), 2001, pp. 41-46
Citations number
26
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CHEMICAL PHYSICS LETTERS
ISSN journal
00092614 → ACNP
Volume
346
Issue
1-2
Year of publication
2001
Pages
41 - 46
Database
ISI
SICI code
0009-2614(20010928)346:1-2<41:DOAPSI>2.0.ZU;2-N
Abstract
Relaxation dynamics of polydiacetylene was investigated with femtosecond ti me-resolved absorption spectroscopy between 1120 and 1280 cm(-1). A new pho to-induced IR band was found at 1225 cm(-1) just after photo-excitation, an d it disappeared with a decay time constant of 4.1 +/- 0.7 ps. This IR band is assigned to the vibrational mode which induces self-trapping of the 1B( 1u) exciton. (C) 2001 Elsevier Science B.V. All rights reserved.