Dynamics of Dicyanamide in Ionic Liquids is Dominated by Local Interactions.

ABSTRACT: The dynamics of probe molecules is commonly used to investigate the structural dynamics of room-temperature ionic liquids; however, the extent to which this dynamics reflects the dynamics of the ionic liquids or is probe specific has remained debated. Here, we explore to what extent the vibrational and rotational dynamics of the dicyanamide anion, a common ionic liquid anion, correlates with the structural relaxation of ionic liquids. We use polarization-resolved, ultrafast infrared spectroscopy to probe the temperature- and probe-concentration-dependent dynamics of samples with small amounts of 1-ethyl-3-methylimidazolium ([emim]⁺) dicyanamide ([DCA]^-) dissolved in four [emim]⁺-based ionic liquids with tetrafluoroborate ([BF₄]^-), bis(

SUBMITTER: Hunger J 

PROVIDER: S-EPMC6398149 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature