J Phys Chem B 2021 Jul 29;125(27):7546-7555. Epub 2021 Jun 29.
Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States.
The ballistic regime of vibrational energy transport in oligomeric molecular chains occurs with a constant, often high, transport speed and high efficiency. Such a transport regime can be initiated by exciting a chain end group with a mid-infrared (IR) photon. To better understand the wavepacket formation process, two chemically identical end groups, azido groups with normal, N-, and isotopically substituted, N-, nitrogen atoms, were tested for wavepacket initiation in compounds with alkyl chains of = 5, 10, and 15 methylene units terminated with a carboxylic acid (-a) group, denoted as NC-a and NC-a. Read More