Structural effects in the decay kinetics of 1-naphthyl derivative-triethylamine exciplexes

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Abstract

The formation and decay kinetics of fluorescence spectra of triethylamine (TEA) exciplexes with naphthalene and 1-naphthalyl derivatives were investigated in cyclohexane. The stability of the singlet exciplexes was shown to determine the kinetics. The loosely bound exciplexes between TEA and naphthalene or 1-methylnaphthalene were formed in reversible processes, while the tightly bound complexes of TEA with 1-naphthyl-N-methyl-carbamate or with 1-naphthyl-acetate were the product of irreversible reactions of the singlet excited aromatic acceptor with the ground state aliphatic amine molecules. The increases electron affinity of the carbamate and acetate derivatives promoted the formation of ground state complexes and made possible a second route of exciplex formation. Evaluation of the time-resolved fluorescence results supplied the room temperature rate coefficients for the elementary steps.

Original languageEnglish
Pages (from-to)265-276
Number of pages12
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume48
Issue number2-3
DOIs
Publication statusPublished - 1989

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Naphthalene
Ground state
Fluorescence
Derivatives
naphthalene
Electron affinity
Kinetics
acetates
kinetics
decay
Cyclohexane
Amines
fluorescence
ground state
Carbamates
electron affinity
cyclohexane
Molecules
amines
Acetates

ASJC Scopus subject areas

  • Bioengineering
  • Physical and Theoretical Chemistry

Cite this

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abstract = "The formation and decay kinetics of fluorescence spectra of triethylamine (TEA) exciplexes with naphthalene and 1-naphthalyl derivatives were investigated in cyclohexane. The stability of the singlet exciplexes was shown to determine the kinetics. The loosely bound exciplexes between TEA and naphthalene or 1-methylnaphthalene were formed in reversible processes, while the tightly bound complexes of TEA with 1-naphthyl-N-methyl-carbamate or with 1-naphthyl-acetate were the product of irreversible reactions of the singlet excited aromatic acceptor with the ground state aliphatic amine molecules. The increases electron affinity of the carbamate and acetate derivatives promoted the formation of ground state complexes and made possible a second route of exciplex formation. Evaluation of the time-resolved fluorescence results supplied the room temperature rate coefficients for the elementary steps.",
author = "L. Bicz{\'o}k and T. B{\'e}rces and F. M{\'a}rta",
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journal = "Journal of Photochemistry and Photobiology A: Chemistry",
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T1 - Structural effects in the decay kinetics of 1-naphthyl derivative-triethylamine exciplexes

AU - Biczók, L.

AU - Bérces, T.

AU - Márta, F.

PY - 1989

Y1 - 1989

N2 - The formation and decay kinetics of fluorescence spectra of triethylamine (TEA) exciplexes with naphthalene and 1-naphthalyl derivatives were investigated in cyclohexane. The stability of the singlet exciplexes was shown to determine the kinetics. The loosely bound exciplexes between TEA and naphthalene or 1-methylnaphthalene were formed in reversible processes, while the tightly bound complexes of TEA with 1-naphthyl-N-methyl-carbamate or with 1-naphthyl-acetate were the product of irreversible reactions of the singlet excited aromatic acceptor with the ground state aliphatic amine molecules. The increases electron affinity of the carbamate and acetate derivatives promoted the formation of ground state complexes and made possible a second route of exciplex formation. Evaluation of the time-resolved fluorescence results supplied the room temperature rate coefficients for the elementary steps.

AB - The formation and decay kinetics of fluorescence spectra of triethylamine (TEA) exciplexes with naphthalene and 1-naphthalyl derivatives were investigated in cyclohexane. The stability of the singlet exciplexes was shown to determine the kinetics. The loosely bound exciplexes between TEA and naphthalene or 1-methylnaphthalene were formed in reversible processes, while the tightly bound complexes of TEA with 1-naphthyl-N-methyl-carbamate or with 1-naphthyl-acetate were the product of irreversible reactions of the singlet excited aromatic acceptor with the ground state aliphatic amine molecules. The increases electron affinity of the carbamate and acetate derivatives promoted the formation of ground state complexes and made possible a second route of exciplex formation. Evaluation of the time-resolved fluorescence results supplied the room temperature rate coefficients for the elementary steps.

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