Dual fluorescence and fast intramolecular charge transfer with 4-(diisopropylamino)benzonitrile in alkane solvents

A. Demeter, Sergey Druzhinin, Mathew George, Edwin Haselbach, Jean Luc Roulin, Klaas A. Zachariasse

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Dual fluorescence and fast intramolecular charge transfer (ICT) is observed with 4-(diisopropylamino)benzonitrile (DIABN) in alkane solvents. The rate constant ka for the reaction from the locally excited (LE) to the ICT state has a value of 3.4×1011 s-1 in n-hexane at 25°C, with an activation energy Ea of 6 kJ mol-1. Efficient intersystem crossing with a yield of 0.94 takes place from the ICT state. With 4-(dimethylamino)benzonitrile, in contrast, dual fluorescence is not observed in alkanes. The charge transfer reaction of DIABN is mainly favoured by its small energy gap ΔE(S1,S2), in accordance with the PICT model for ICT in aminobenzonitriles.

Original languageEnglish
Pages (from-to)351-360
Number of pages10
JournalChemical Physics Letters
Volume323
Issue number3-4
Publication statusPublished - Jun 16 2000

Fingerprint

Alkanes
alkanes
Charge transfer
Fluorescence
charge transfer
fluorescence
Rate constants
Energy gap
Activation energy
benzonitrile
activation energy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Demeter, A., Druzhinin, S., George, M., Haselbach, E., Roulin, J. L., & Zachariasse, K. A. (2000). Dual fluorescence and fast intramolecular charge transfer with 4-(diisopropylamino)benzonitrile in alkane solvents. Chemical Physics Letters, 323(3-4), 351-360.

Dual fluorescence and fast intramolecular charge transfer with 4-(diisopropylamino)benzonitrile in alkane solvents. / Demeter, A.; Druzhinin, Sergey; George, Mathew; Haselbach, Edwin; Roulin, Jean Luc; Zachariasse, Klaas A.

In: Chemical Physics Letters, Vol. 323, No. 3-4, 16.06.2000, p. 351-360.

Research output: Contribution to journalArticle

Demeter, A, Druzhinin, S, George, M, Haselbach, E, Roulin, JL & Zachariasse, KA 2000, 'Dual fluorescence and fast intramolecular charge transfer with 4-(diisopropylamino)benzonitrile in alkane solvents', Chemical Physics Letters, vol. 323, no. 3-4, pp. 351-360.
Demeter A, Druzhinin S, George M, Haselbach E, Roulin JL, Zachariasse KA. Dual fluorescence and fast intramolecular charge transfer with 4-(diisopropylamino)benzonitrile in alkane solvents. Chemical Physics Letters. 2000 Jun 16;323(3-4):351-360.
Demeter, A. ; Druzhinin, Sergey ; George, Mathew ; Haselbach, Edwin ; Roulin, Jean Luc ; Zachariasse, Klaas A. / Dual fluorescence and fast intramolecular charge transfer with 4-(diisopropylamino)benzonitrile in alkane solvents. In: Chemical Physics Letters. 2000 ; Vol. 323, No. 3-4. pp. 351-360.
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