Effects of acid concentration on intramolecular charge transfer reaction of 4-(azetidinyl) benzonitrile in solution

Journal of Chemical Sciences

Ranjit Biswas1¹  Tuhin Pradhan¹  Biswajit Guchhait¹ 

[1] Department of Chemical, Biological and Macromolecular Sciences, SN Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700 098, India$$

关键词: Intramolecular charge transfer;    absorption and fluorescence;    time resolved fluorescence measurements;    acid concentration dependence;    time-dependent density functional theory.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Effects of acid concentration on excited state intramolecular charge transfer reaction of 4-(azetidinyl) benzonitrile (P4C) in aprotic (acetonitrile and ethyl acetate) and protic (ethanol) solvents have been studied by means of steady state absorption and fluorescence, and time resolved fluorescence spectroscopic techniques. While absorption and fluorescence bands of P4C have been found to be shifted towards higher energy with increasing acid concentration in acetonitrile and ethyl acetate, no significant dependence has been observed in ethanolic solutions. Reaction rate becomes increasingly slower with acid concentration in acetonitrile and ethyl acetate. In contrast, acid in ethanolic solutions does not produce such an effect on reaction rate. Time-dependent density functional theory calculations have been performed to understand the observed spectroscopic results.

【 授权许可】

Unknown