Blocking effect of TiO2 colloids on the excited state isomerization of a cyanine dye

Authors
Zhang, TQ Yang, H Wang, SF Gong, QH Jian, HH Xu, GZ Chen, CP Yan, WP
Citation
Tq. Zhang et al., Blocking effect of TiO2 colloids on the excited state isomerization of a cyanine dye, CHEM P LETT, 308(3-4), 1999, pp. 218-222
Citations number
15
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CHEMICAL PHYSICS LETTERS
ISSN journal
00092614 → ACNP
Volume
308
Issue
3-4
Year of publication
1999
Pages
218 - 222
Database
ISI
SICI code
0009-2614(19990723)308:3-4<218:BEOTCO>2.0.ZU;2-I
Abstract
Fluorescence dynamics of a cyanine dye 3,3'-di(3-sulfopropyl)-thiacyanine t riethylaminium salt in water with and without doping TiO2 colloids has been investigated using the femtosecond time-resolved fluorescence up-conversio n technique. A new component with a decay time larger than 30 ps for the dy e molecules associated with TiO2 was observed and a blocking effect of TiO2 on the conformational isomerization process of the cyanine dye is suggeste d. (C) 1999 Elsevier Science B.V. All rights reserved.