The Photophysics of 7-(N,N'-diethylamino)coumarin-3-carboxylic Acid in water/AOT/isooctane Reverse

Micelle: An Excitation Wavelength Dependent Study

The photophysics of 7-(N,N'-diethylamino)coumarin-3-carboxylic (7-DCCA) in water/AOT/isooctane reverse micelles was determined by using steady state absorption and fluorescence emission spectroscopy and time resolved fluorescence spectroscopy. The spectral behaviours of 7-DCCA have been reported inside the water/AOT/isooctane reverse micelles with variation of excitation wavelength.

The dynamics of solvent and rotational relaxation have been reported by using two different excitation wavelength (λexi = 375 nm and λexi = 405 nm). The excitation wavelength dependent dynamics of 7-DCCA in the reverse micelles were observed. The fluorescence quantum yield, decay time, solvent relaxation time and rotational relaxation time of 7-DCCA in reverse micelles are varying with the excitation wavelength. Two step and wobbling-in-cone model was used to interpret the rotational relaxation dynamics of 7-DCCA in reverse micelles. This work has been published in Physical Chemistry Chemical Physics (DOI: 10.1039/C2CP43483K).