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2002 | 102 | 3 | 443-468
Article title

Photoinduced Charge-Transfer Reactions of Tricyanoethlene with Aromatic Hydrocarbon Electron Donors. I. Emission Studies of Naphthalene-Tricyanoethylene Exciplex

Content
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EN
Abstracts
EN
The fluorescence quenching of a series of aromatic hydrocarbon electron donors by an electron acceptor tricyanoethylene has been observed. The quenching mechanism is consistent with the charge-transfer (or electron-transfer) mechanism, as indicated by the appearance of a new, broad, and structureless exciplex emission band. Detailed, steady-state, and time-resolved emission studies of the kinetics and thermodynamics of exciplex formation and relaxation have been performed for naphthalene-tricyanoethylene system. It was found that the kinetics of monomer-exciplex equilibrium for this system, in a non-polar solvent (n-hexane), can be described in terms of a simple two-state photokinetic scheme. Within such a scheme, under conditions of the present experiment, napthalene-tricyanoethylene system approaches the limits under which exciplex formation is very effective - it becomes exclusively diffusion-controlled and at the same time a competitive process of thermal dissociation of exciplex ceases to operate. This leads to a very rarely observed reversal of physical meaning of the decay parameters which are describing the rise and the decay of exciplex fluorescence.
Keywords
EN
Publisher

Year
Volume
102
Issue
3
Pages
443-468
Physical description
Dates
published
2002-09
received
2002-03-11
(unknown)
2002-06-29
Contributors
author
  • Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
author
  • Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
  • Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
author
  • Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
author
  • Dipartimento di Scienze dei Materiali e della Terra, Universita degli Studi di Ancona, via Brecce Bianche, 60131 Ancona, Italy
author
  • Dipartimento di Scienze dei Materiali e della Terra, Universita degli Studi di Ancona, via Brecce Bianche, 60131 Ancona, Italy
author
  • Dipartimento di Scienze dei Materiali e della Terra, Universita degli Studi di Ancona, via Brecce Bianche, 60131 Ancona, Italy
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv102n302kz
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