Exciplex emission from the mixed dimer of naphthalene and 2-cyanonaphthalene in a supersonic jet

Aloke Das, K. K. Mahato, Chayan K. Nandi, Tapas Chakraborty, Shridhar R. Gadre, Nikhil A. Gokhale

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The photophysical behavior for the S1←S0 transition of the van der Waals mixed dimer of naphthalene and 2-cyanonaphthalene has been investigated by use of laser-induced fluorescence spectroscopy in a supersonic free jet expansion. The structure of the dimer in the ground state has been computed by electrostatic and ab initio quantum chemical calculations. Our experimental results show that unlike the behavior of the molecules in nonpolar solutions, the jet-cooled dimer emits exciplex fluorescence upon excitation to the S1 state. Charge transfer interactions between the naphthalene donor and the cyanonaphthalene acceptor and orbital overlap between the nearly identical π-systems of the two molecules are considered to be the main factors for the stability of the exciplex in the jet.

Original languageEnglish
Pages (from-to)2162-2168
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume4
Issue number11
DOIs
Publication statusPublished - 03-06-2002

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naphthalene
Dimers
dimers
Molecules
free jets
Fluorescence spectroscopy
laser induced fluorescence
Ground state
Charge transfer
molecules
Electrostatics
Fluorescence
charge transfer
electrostatics
orbitals
fluorescence
expansion
ground state
Lasers
spectroscopy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Das, Aloke ; Mahato, K. K. ; Nandi, Chayan K. ; Chakraborty, Tapas ; Gadre, Shridhar R. ; Gokhale, Nikhil A. / Exciplex emission from the mixed dimer of naphthalene and 2-cyanonaphthalene in a supersonic jet. In: Physical Chemistry Chemical Physics. 2002 ; Vol. 4, No. 11. pp. 2162-2168.
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Exciplex emission from the mixed dimer of naphthalene and 2-cyanonaphthalene in a supersonic jet. / Das, Aloke; Mahato, K. K.; Nandi, Chayan K.; Chakraborty, Tapas; Gadre, Shridhar R.; Gokhale, Nikhil A.

In: Physical Chemistry Chemical Physics, Vol. 4, No. 11, 03.06.2002, p. 2162-2168.

Research output: Contribution to journalArticle

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T1 - Exciplex emission from the mixed dimer of naphthalene and 2-cyanonaphthalene in a supersonic jet

AU - Das, Aloke

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AB - The photophysical behavior for the S1←S0 transition of the van der Waals mixed dimer of naphthalene and 2-cyanonaphthalene has been investigated by use of laser-induced fluorescence spectroscopy in a supersonic free jet expansion. The structure of the dimer in the ground state has been computed by electrostatic and ab initio quantum chemical calculations. Our experimental results show that unlike the behavior of the molecules in nonpolar solutions, the jet-cooled dimer emits exciplex fluorescence upon excitation to the S1 state. Charge transfer interactions between the naphthalene donor and the cyanonaphthalene acceptor and orbital overlap between the nearly identical π-systems of the two molecules are considered to be the main factors for the stability of the exciplex in the jet.

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