Picosecond infrared dynamics of electron trapping in polar liquids

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Abstract
We report new data on the formation and decay of the infrared absorbing, trapped electron (e−t) formed during the picosecond laser photoionization of TMPD in ethanol, propanol, butanol, and decanol at 295 K. The transient absorption at 1300 nm, formed ?3 ps, appears to decay on a time scale comparable to the picosecond formation time of the visible absorbing, solvated electron (e−s) in each alcohol. There is no discernible delay between the loss of e−t and the initial appearance of e−s. The results are discussed in the context of current models of electron solvation.