Abstract
Herein, we investigate the charge transport and structural dynamics in the supercooled and glassy state of protic ionic material with an efficient interionic Grotthuss mechanism. We found that supe...
Highlights
Charge transport through intermolecular proton hopping is considered essential for many chemical processes
We found that τα(T, P) and σdc(T, P) dependences, determined from dynamic light scattering− photon correlation spectroscopy (DLS) experiments and broadband dielectric spectroscopy (BDS) measurements, respectively, recalculated to TVγ representation, both satisfy the scaling law, with different γ coefficients
We have investigated the molecular dynamics of the acebutolol hydrochloride (ACB-HCl) protic ionic glass-former with efficient inter- and intramolecular proton transport
Summary
Charge transport through intermolecular proton hopping is considered essential for many chemical processes. For aprotic ionic systems, characterized by charge transport fully controlled by ion diffusion (vehicle mechanism), a state-point-independent γ is obtained independently of the dynamic properties being tested.[24] This allows us to believe that the time scale separation existing between charge and mass transport in proton-conducting glass-formers will bring different values of the γ coefficient for log10σdc = f(TVγ) and log10η = f(TVγ) scaling. If such a scenario comes true, the ratio γσ/γη can be treated as a new measure of Grotthuss conduction in protic ionic materials both at ambient and elevated pressures. Because PVT devices measure only the changes in the specific volume, it is necessary to correct the measured values by adding the specific volume under known, typically ambient conditions, which is 0.845 cm[3] g−1 (determined by means of helium pycnometer at 0.1 MPa and 293.15 K)
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