Excited state hydrogen transfer dynamics in phenol-(NH) studied by picosecond UV-near IR-UV time-resolved spectroscopy.

Time-evolutions of excited state hydrogen transfer (ESHT) in phenol (PhOH)-(NH) clusters have been measured by three-color picosecond (ps) ultraviolet (UV)-near infrared (NIR)-UV pump-probe ion dip spectroscopy. The formation of a reaction product, ˙NHNH, is detected by its NIR absorption due to a 3p-3s Rydberg transition. The ESHT reactions from all of the vibronic levels show biexponential time-evolutions, even from the S origin.