Solvation dynamics in nonaqueous reverse micelles

We have investigated the solvation dynamics of methanol and acetonitrile in reverse micelles for the first time. The solvation dynamics of both methan ol and acetonitrile in reverse micelles show nonexponential Features and un usual slow solvation components (from a few hundreds of picosecond to sever al nanoseconds). Interestingly, the solvation dynamics of methanol in rever se micelles becomes faster with a larger ratio of polar solvent to surfacta nt (w = [polar solvent]/[Aerosol OT]) of micelles. However, the w dependenc e of the solvation dynamics of acetonitrile in reverse micelles is not obse rved. The different rv dependence of solvation dynamics in methanol and ace tonitrile within reverse micelles should be arising from the presence of th e intermolecular hydrogen-bonding network.