A femtosecond study of photoinduced electron transfer from dimethylaniline to coumarin dyes in a cetyltrimethylammonium bromide micelle |
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Authors: | Ghosh Subhadip Sahu Kalyanasis Mondal Sudip Kumar Sen Pratik Bhattacharyya Kankan |
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Institution: | Physical Chemistry Department, Indian Association for the Cultivation of Science Jadavpur, Kolkata-700 032, India. |
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Abstract: | Ultrafast photoinduced electron transfer (PET) from N,N-dimethylaniline to coumarin dyes in cetyltrimethylammonium bromide (CTAB) micelle is studied using femtosecond upconversion spectroscopy. The rate of PET in a CTAB micelle is found to be highly nonexponential with components much faster (approximately 10 ps) than the slow components of solvation dynamics. The ultrafast components of electron transfer exhibits a bell-shaped dependence on the free energy change which is similar to the Marcus inversion. |
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