Mid-IR-Induced Nuclear Wavepacket Motion of a Hydrogen Bonding System: Effects of Mechanical and Electrical Anharmonic Couplings

Abstract

Coherent hydrogen-bond stretching vibration was observed by probing ultrafast visible absorption change after impulsive mid-infrared excitation of the OH-stretching mode of an intramolecularly hydrogen-bonded molecule. The underlying mechanism of the wavepacket formation was discussed on a theoretical basis considering mechanical and electrical anharmonicities.