Photophysics of a coumarin based Schiff base in solvents of varying polarities

Ghosh, Saptarshi ; Roy, Nayan ; Sanjoy Singh, T. ; Chattopadhyay, Nitin (2018) Photophysics of a coumarin based Schiff base in solvents of varying polarities Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 188 . pp. 252-257. ISSN 1386-1425

Full text not available from this repository.

Official URL:

Related URL:


The present work reports detailed photophysics of a coumarin based Schiff base, namely, (E)-7-(((8-hydroxyquinolin-2-yl)methylene)amino)-4-methyl-2H-chromen-2-one (HMC) in different solvents of varying polarity exploiting steady state absorption, fluorescence and time resolved fluorescence spectroscopy. The dominant photophysical features of HMC are discussed in terms of emission from an intramolecular charge transfer (ICT) excited state. Molecular orbital (MO) diagrams as obtained from DFT based computational analysis confirms the occurrence of charge transfer from 8′-hydroxy quinoline moiety of the molecule to the coumarin part. The notable difference in the photophysical response of HMC from its analogous coumarin (C480) lies in a lower magnitude of fluorescence quantum yield of the former, particularly in the solvents of low polarity, which is rationalized by considering the higher rate of non-radiative decay of HMC in apolar solvents. Phosphorescence emission as well as phosphorescence lifetime of HMC has also been reported in 77 K frozen matrix.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Schiff Base; Photophysics; Intramolecular Charge Transfer; Fluorescence; Molecular Orbital
ID Code:111455
Deposited On:01 Sep 2017 12:30
Last Modified:01 Sep 2017 12:30

Repository Staff Only: item control page