- Conference date: 23–25 May 2011
- Location: Kerala, (India)
We have studied the optical gain of Fullerene and Fullerene in toluene solution by variable strip method. The technique involves the comparison of fluorescence emission at different length of pumped material. The gain is found to be positive for a very narrow range of concentration. The optical gain is maximum at 40 μM concentration for both fullerene molecules. Optical gain is highly concentration dependent and milli molar concentration is not the optimum concentration for the measurement of optical gain. But the value of peak gain for fullerene is more than that of fullerene . It may be due to the extent of twisted intermolecular charge transfer (TICT) formation in the excited state is larger for fullerene . Therefore, optical gain for fullerene C60 is less than fullerene . This is thus an important distinguishing parameter of two sister molecules.
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