Thursday, April 27, 2017
Nilesh Ramchandra Dhumal, Johannes Kiefer, David Andrew Turton, Klaas Wynne, and Hyung J Kim
Dielectric relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethylsulfate (EMI+ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Character- istics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of dielectric relaxation. The MD results are compared with the experimental low- frequency spectrum of EMI+ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.