Photophysical investigations on interaction of p-bromoacetanilide with eosin in solution
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Department of Chemistry, Saveetha School of Engineering, Saveetha University, Thandalam-602 105,
Tamilnadu, India
E-mail : krishflowers@gmail.com
Department of Physics, Saveetha School of Engineering, Saveetha University, Thandalam-602 105,
Tamilnadu, India
E-mail : udayalakshmi@gmail.com
Manuscript received online 21 October 2013, accepted 21 November 2013
The photophysical properties of p-bromoacetanilide were studied in neat methanol solution. The characteristic excitation and emission spectra were recorded and compared with the behavior in the solid state. Interaction of p-bromoacetanilide with an anionic fluorophore, eosin, was studied by steady state measurements and the behavior was gauged by using Stern-Volmer kinetics. A significant decrease in fluorescence intensity was observed and this was attributed to a combined phenomenon of static and dynamic quenching. The ground state interaction between the halide ions were found to be predominant than the dynamic quenching. The rate constants of the quenching phenomena were obtained from modified Stern-Volmer equation.
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