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Scientific article
English

Spectral Hole Burning Study of Squaraine Dyes in Polymer Films

Contributors

Vauthey, Eric; Voss, Jochen; De Caro, Cosimo; Renn, Alois; Wild, Urs P.

Published in

Journal of luminescence, vol. 56, no. 1-3, p. 61-69

Publication date

1993

Abstract

A study of the hole-burning mechanisms of bis[4-(diethylamino)-2-hydroxyphenyl]squaraine (DEAH) and bis[4-(disethylamino)-phenyl]squaraine (DEA) in hydrogen-bonding and non-hydrogen-bonding polymers is presented. Intramolecular H-bonding is only possible for DEAH. In all systems, the spectral holes are not persistent and decay with a distribution of rates ranging from 10-5s-1 to about 1 s-1, the time resolution of the experiment. In H-donating matrices, this distribution varies with the burning wavelength. From the hole-burning efficiencies and the kineticsof the hole refilling, four different types of nonphotochemical hole-burning mechanisms are postulated. The efficiency of these mechanisms depends mainly on the occurrence of processes slowing down the relaxation to the initial product state.

UNIGE affiliation entities

UNIGE research groups

Citation (ISO format)

VAUTHEY, Eric et al. Spectral Hole Burning Study of Squaraine Dyes in Polymer Films. In: Journal of luminescence, 1993, vol. 56, n° 1-3, p. 61–69. doi: 10.1016/0022-2313(93)90055-R

Identifiers

Journal ISSN

0022-2313
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Technical informations

Creation

21/09/2009 16:11:25

First validation

21/09/2009 16:11:25

Update

14/03/2023 15:13:15

Status update

14/03/2023 15:13:14

Last indexation

29/10/2024 12:07:37
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