Terahertz time-domain coherent Raman spectroscopy of electrolyte aqueous solutions

Abstract

By employing chirped optical pulses, one can obtain coherent Raman spectra of molecules in the terahertz frequency range. This technique, known as Terahertz Time-Domain Coherent Raman Spectroscopy (THz-TDCR), enables us to investigate molecular hydration states, the hydrogen-bonding network of water, and their dynamic behavior. In this study, we present THz Raman spectra of various aqueous electrolyte solutions across different molar concentrations to clarify how electrolyte ions affect water’s intermolecular vibrational modes.
In this presentation, we will cover the measurement principles, describe our experimental apparatus, and discuss how the THz Raman spectral features of different electrolyte solutions vary with ion type.