Excited state intramolecular charge transfer reaction in binary mixtures of water and tertiary butanol (TBA): alcohol mole fraction dependence

The Journal of Physical Chemistry. a
Tuhin PradhanRanjit Biswas

Abstract

The excited state intramolecular charge transfer reaction of 4-(1-azetidinyl)benzonitrile (P4C) has been studied in water-tertiary butanol (TBA) mixtures at different alcohol mole fractions by using steady state and time-resolved fluorescence spectroscopy. The ratio between the areas under the locally excited (LE) and charge transferred (CT) emission bands is found to exhibit a sharp rise at alcohol mole fraction approximately 0.04, a value at which several thermodynamic properties of this mixture is known to show anomalous change due to the enhancement of H-bonding network. The radiative rate associated with the LE emission also shows a maximum at this TBA mole fraction. Although the structural transition from the water-like tetrahedral network to the alcohol-like chain is reflected in the red shift of the absorption spectrum up to TBA mole fraction approximately 0.10, the emission bands (both LE and CT) show the typical nonideal alcohol mole fraction dependence at all TBA mole fractions. Quantum yield, CT radiative rate as well as transition moments also exhibit a nonideal alcohol mole fraction dependence. The time-resolved emission decay of P4C has been found to be biexponential at all TBA mole fractions, regardless of emiss...Continue Reading

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Citations

Jul 10, 2010·The Journal of Chemical Physics·Ah-Young JeeMinyung Lee
Jun 30, 2015·The Journal of Physical Chemistry. B·Debasis BanikNilmoni Sarkar
Oct 17, 2012·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Aninda Chatterjee, Debabrata Seth
Feb 11, 2015·The Journal of Chemical Physics·Debasis BanikNilmoni Sarkar
Sep 27, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Jihee ChoSanghee Kim
Apr 15, 2019·The Journal of Chemical Physics·Milan K HazraBiman Bagchi
Mar 5, 2011·The Journal of Physical Chemistry. a·Harun Al Rasid Gazi, Ranjit Biswas
Jun 21, 2011·The Journal of Physical Chemistry. B·Namrata SarmaRanjit Biswas
Sep 14, 2021·Physical Chemistry Chemical Physics : PCCP·Vikas DubeySnehasis Daschakraborty

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