Picosecond deactivation of azo dye excited states in solution and in cellulose

Laurence C. Abbott; Stephen N. Batchelor; Lisinka Jansen; John Oakes; John R. Lindsay Smith; John N. Moore

doi:10.1016/j.jphotochem.2010.11.017

Picosecond deactivation of azo dye excited states in solution and in cellulose

Laurence C. Abbott, Stephen N. Batchelor, Lisinka Jansen, John Oakes, John R. Lindsay Smith, John N. Moore

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Ultrafast time-resolved UV-visible absorption spectroscopy has been used to study four model azo dyes and five commercial azo dyes. All of the dyes have been found to show strong bleaching of their ground-state absorption bands on photoexcitation, with recovery lifetimes of 1-5 ps in aqueous solution that are attributed to rapid and efficient non-radiative decay; two commercial azo dyes deposited in cellophane have been found to show an additional longer-lived component with a lifetime of > 50 ps that is attributed to the effects of intermolecular interactions with the cellulosic environment. (C) 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	11-16
Number of pages	6
Journal	JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume	218
Issue number	1
DOIs	https://doi.org/10.1016/j.jphotochem.2010.11.017
Publication status	Published - 5 Feb 2011

Keywords

Azo dye
Picosecond
Time-resolved UV-visible spectroscopy
Cellulose
Cellophane
VISIBLE ABSORPTION-SPECTROSCOPY
ALPHA-HYDROXYALKYL RADICALS
QUANTITATIVE RATE CONSTANTS
LASER FLASH-PHOTOLYSIS
TRANS-AZOBENZENE
ORANGE-II
AQUEOUS-SOLUTION
PULSE-RADIOLYSIS
SPECTRAL CHARACTERIZATION
OXIDIZED FORMS

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10.1016/j.jphotochem.2010.11.017

http://www.sciencedirect.com/science/article/pii/S1010603010004703

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title = "Picosecond deactivation of azo dye excited states in solution and in cellulose",

abstract = "Ultrafast time-resolved UV-visible absorption spectroscopy has been used to study four model azo dyes and five commercial azo dyes. All of the dyes have been found to show strong bleaching of their ground-state absorption bands on photoexcitation, with recovery lifetimes of 1-5 ps in aqueous solution that are attributed to rapid and efficient non-radiative decay; two commercial azo dyes deposited in cellophane have been found to show an additional longer-lived component with a lifetime of > 50 ps that is attributed to the effects of intermolecular interactions with the cellulosic environment. (C) 2011 Elsevier B.V. All rights reserved.",

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author = "Abbott, {Laurence C.} and Batchelor, {Stephen N.} and Lisinka Jansen and John Oakes and {Lindsay Smith}, {John R.} and Moore, {John N.}",

year = "2011",

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doi = "10.1016/j.jphotochem.2010.11.017",

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T1 - Picosecond deactivation of azo dye excited states in solution and in cellulose

AU - Abbott, Laurence C.

AU - Batchelor, Stephen N.

AU - Jansen, Lisinka

AU - Oakes, John

AU - Lindsay Smith, John R.

AU - Moore, John N.

PY - 2011/2/5

Y1 - 2011/2/5

N2 - Ultrafast time-resolved UV-visible absorption spectroscopy has been used to study four model azo dyes and five commercial azo dyes. All of the dyes have been found to show strong bleaching of their ground-state absorption bands on photoexcitation, with recovery lifetimes of 1-5 ps in aqueous solution that are attributed to rapid and efficient non-radiative decay; two commercial azo dyes deposited in cellophane have been found to show an additional longer-lived component with a lifetime of > 50 ps that is attributed to the effects of intermolecular interactions with the cellulosic environment. (C) 2011 Elsevier B.V. All rights reserved.

AB - Ultrafast time-resolved UV-visible absorption spectroscopy has been used to study four model azo dyes and five commercial azo dyes. All of the dyes have been found to show strong bleaching of their ground-state absorption bands on photoexcitation, with recovery lifetimes of 1-5 ps in aqueous solution that are attributed to rapid and efficient non-radiative decay; two commercial azo dyes deposited in cellophane have been found to show an additional longer-lived component with a lifetime of > 50 ps that is attributed to the effects of intermolecular interactions with the cellulosic environment. (C) 2011 Elsevier B.V. All rights reserved.

KW - Azo dye

KW - Picosecond

KW - Time-resolved UV-visible spectroscopy

KW - Cellulose

KW - Cellophane

KW - VISIBLE ABSORPTION-SPECTROSCOPY

KW - ALPHA-HYDROXYALKYL RADICALS

KW - QUANTITATIVE RATE CONSTANTS

KW - LASER FLASH-PHOTOLYSIS

KW - TRANS-AZOBENZENE

KW - ORANGE-II

KW - AQUEOUS-SOLUTION

KW - PULSE-RADIOLYSIS

KW - SPECTRAL CHARACTERIZATION

KW - OXIDIZED FORMS

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JO - JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

JF - JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

IS - 1

ER -

Picosecond deactivation of azo dye excited states in solution and in cellulose

Abstract

Keywords

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