Intermolecular Dynamics in Liquids/Solutions
Because the intermolecular dynamics of solvents influences the barrier-crossing processes in chemical reactions, biological processes, and relaxations in solutions (e.g., electron transfer, proton transfer, and protein folding) studies on the ultrafast dynamics in liquid/solutions are essential.
Intermolecular vibrations in liquids/solutions appear at the low-frequency region (typically below 200 cm-1). The intermolecular vibration's spectral band in liquids/solutions is very broad compared to the intramolecular vibration's one.
We are studying the low-frequency vibrational motions in not only simple molecular liquids, but also complex liquids such as ionic liquids and polymer solutions using fs-RIKES.
Data Collections of Low-Frequency Spectra of Liquids
Aprotic Molecular Liquids: Bull. Chem. Soc. Jpn. 2009, 82 (11), 1347-1366.
Aromatic Ionic Liquids: Bull. Chem. Soc. Jpn. 2016, 89 (9), 1106-1128.
Nonaromatic Ionic Liquids: Bull. Chem. Soc. Jpn. 2020, 93 (12), 1520-1539.
Hydrogen-Bonding Liquids: in progress.