Excimer formation in the photochemistry of aliphatic ketones II: fluorescence decay kinetics

L. Biczók, S. Förgeteg, T. Bérces, F. Márta

Research output: Article

4 Citations (Scopus)

Abstract

The fluorescence spectra and the fluorescence decay following excitation by means of a light flash were studied for a few simple aliphatic ketones to obtain evidence for excimer formation. The fluorescence spectra of 2-pentanone recorded in iso-octane and in tert-butanol at a number of ketone concentrations show no sign of excimer luminescence. The monomer fluorescence decay kinetics were studied for 2-pentanone in two solvents over a wide range of ketone concentration and for acetone, methyl isopropyl ketone and diisopropyl ketone at one concentration. For all these ketones under all the conditions investigated only double-exponential functions gave a satisfactory fit to the experimental data. The observations were interpreted as evidence for singlet excimer formation in a reversible process. The lifetimes of the excited singlet monomer and excimer and the rate coefficients of the formation and removal of the excimer were determined for 2-pentanone in iso-octane and tert-butanol.

Original languageEnglish
Pages (from-to)49-59
Number of pages11
JournalJournal of Photochemistry
Volume27
Issue number1
DOIs
Publication statusPublished - 1984

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Photochemical reactions
Ketones
Fluorescence
Kinetics
tert-Butyl Alcohol
Monomers
Exponential functions
Acetone
Luminescence
2-pentanone
octane

Cite this

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title = "Excimer formation in the photochemistry of aliphatic ketones II: fluorescence decay kinetics",
abstract = "The fluorescence spectra and the fluorescence decay following excitation by means of a light flash were studied for a few simple aliphatic ketones to obtain evidence for excimer formation. The fluorescence spectra of 2-pentanone recorded in iso-octane and in tert-butanol at a number of ketone concentrations show no sign of excimer luminescence. The monomer fluorescence decay kinetics were studied for 2-pentanone in two solvents over a wide range of ketone concentration and for acetone, methyl isopropyl ketone and diisopropyl ketone at one concentration. For all these ketones under all the conditions investigated only double-exponential functions gave a satisfactory fit to the experimental data. The observations were interpreted as evidence for singlet excimer formation in a reversible process. The lifetimes of the excited singlet monomer and excimer and the rate coefficients of the formation and removal of the excimer were determined for 2-pentanone in iso-octane and tert-butanol.",
author = "L. Bicz{\'o}k and S. F{\"o}rgeteg and T. B{\'e}rces and F. M{\'a}rta",
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TY - JOUR

T1 - Excimer formation in the photochemistry of aliphatic ketones II

T2 - fluorescence decay kinetics

AU - Biczók, L.

AU - Förgeteg, S.

AU - Bérces, T.

AU - Márta, F.

PY - 1984

Y1 - 1984

N2 - The fluorescence spectra and the fluorescence decay following excitation by means of a light flash were studied for a few simple aliphatic ketones to obtain evidence for excimer formation. The fluorescence spectra of 2-pentanone recorded in iso-octane and in tert-butanol at a number of ketone concentrations show no sign of excimer luminescence. The monomer fluorescence decay kinetics were studied for 2-pentanone in two solvents over a wide range of ketone concentration and for acetone, methyl isopropyl ketone and diisopropyl ketone at one concentration. For all these ketones under all the conditions investigated only double-exponential functions gave a satisfactory fit to the experimental data. The observations were interpreted as evidence for singlet excimer formation in a reversible process. The lifetimes of the excited singlet monomer and excimer and the rate coefficients of the formation and removal of the excimer were determined for 2-pentanone in iso-octane and tert-butanol.

AB - The fluorescence spectra and the fluorescence decay following excitation by means of a light flash were studied for a few simple aliphatic ketones to obtain evidence for excimer formation. The fluorescence spectra of 2-pentanone recorded in iso-octane and in tert-butanol at a number of ketone concentrations show no sign of excimer luminescence. The monomer fluorescence decay kinetics were studied for 2-pentanone in two solvents over a wide range of ketone concentration and for acetone, methyl isopropyl ketone and diisopropyl ketone at one concentration. For all these ketones under all the conditions investigated only double-exponential functions gave a satisfactory fit to the experimental data. The observations were interpreted as evidence for singlet excimer formation in a reversible process. The lifetimes of the excited singlet monomer and excimer and the rate coefficients of the formation and removal of the excimer were determined for 2-pentanone in iso-octane and tert-butanol.

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