• Excited state intramolecular charge transfer reaction of 4-(morpholenyl) benzonitrile in solution: Effects of hetero atom in the donor moiety

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    • Keywords


      ICT reaction; solvent effects; hetero atom replacement.

    • Abstract


      An intramolecular charge transfer (ICT) molecule with an extra hetero atom in its donor moiety has been synthesized in order to investigate how ICT reaction is affected by hetero atom replacement. Photo-physical and photo-dynamical properties of this molecule, 4-(morpholenyl)benzonitrile (M6C), have been studied in 20 different solvents. The correlation between the reaction driving force ($-\Delta G_r$) and activation barrier ($\Delta G$#) has been explored in order to understand the solvent effects (static and dynamic) on the photo-excited ICT reaction in this molecule. A Kramer’s model analysis of the experimentally observed reaction rate constants indicates a solvent-averaged activation barrier of $\sim 4 k_BT$ in the absence of solvent dynamical control. The reaction in M6C is therefore not a barrier-less reaction but close to the limit where conventional kinetics might break down.

    • Author Affiliations


      Tuhin Pradhan1 Harun Al Rasid Gazi1 Ranjit Biswas1

      1. Department of Chemical, Biological and Macromolecular Sciences, S.N. Bose National Centre for Basic Sciences, J.D. Block, Sector III, Salt Lake, Kolkata 700 098
    • Dates

  • Journal of Chemical Sciences | News

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