en
Scientific article
Open access
English

Nonradiative Deactivation of Excited Hemicyanines Studied with Submolecular Spatial Resolution by Time-Resolved Surface Second Harmonic Generation at Liquid−Liquid Interfaces

Published inJournal of the American Chemical Society, vol. 133, no. 8, p. 2358-2361
Publication date2011
Abstract

The excited-state dynamics of aminostilbazolium dyes is known to be dominated by nonradiative deactivation through large-amplitude motion. In order to identify the coordinate(s) responsible for this process, the excited-state lifetimes of two dialkylaminostyryl-methylpyridinium iodides have been measured at liquid−liquid interfaces using time-resolved surface second harmonic generation. We found that the decay time of the excited-states of both compounds was increasing with the viscosity of the apolar phase, consisting of n-alkanes of varying length, but was unaffected by that of the polar phase, made of water/glycerol mixtures. This indicates that the nonradiative deactivation is associated with the twist of the dialkylaniline group, which is located in the apolar part of the molecule.

Citation (ISO format)
GASSIN-MARTIN, Gaëlle, VILLAMAINA, Diego, VAUTHEY, Eric. Nonradiative Deactivation of Excited Hemicyanines Studied with Submolecular Spatial Resolution by Time-Resolved Surface Second Harmonic Generation at Liquid−Liquid Interfaces. In: Journal of the American Chemical Society, 2011, vol. 133, n° 8, p. 2358–2361. doi: 10.1021/ja109813j
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal1520-5126
571views
466downloads

Technical informations

Creation04/11/2011 4:36:00 PM
First validation04/11/2011 4:36:00 PM
Update time03/14/2023 4:15:12 PM
Status update03/14/2023 4:15:12 PM
Last indexation01/15/2024 10:18:48 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack