English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Most ionic liquids contain at least one rather complex ion species exhibitinga dipolar moment. In the present work, we provide a thorough evaluation ofbroadband dielectric spectra of 12 ionic liquids taking into account the oftenneglected reorientational dynamics of these ions. We confirm that this dynamicsleads to a clear relaxational signature in the spectra, a fact that so far onlywas considered in few previous works. The obtained reorientational relaxationtimes are well consistent with earlier inelastic light-scattering andhigh-frequency dielectric investigations. Evaluating our dielectric spectra interms of reorientational motions reveals a close coupling of the ion-rotationdynamics to the ionic charge transport in a broad temperature range from thelow-viscosity liquid above room temperature deep into the high-viscositysupercooled state close to Tg. This coupling does not seem to be mediated bythe viscosity but probably is of more direct nature, pointing to arevolving-door mechanism as also considered for plastic-crystalline ionicconductors. Our results show that the reorientational motion of the dipolarions plays a significant and so far widely overlooked role for the ionic chargetransport in ionic liquids.

Importance of reorientational dynamics for the charge transport in ionic liquids