Ionic conductivity of monohydroxy alcohol liquids doped with known probe ions and analysis of the liquid structure
Abstract
The specific values of the conductivity (σ) and its variation with temperature (T) of 2-pentanol and 2-methyl-1-pentanol liquids doped with different concentrations of NaI (abbreviated as 2PEN-xNaI and 2M1PEN-xNaI, respectively) (x=0%, 1% and 5%) are measured by the commercial equipment. The results show that whether NaI is doped or not, σ of 2PEN-xNaI and 2M1PEN-xNaI all have a conductivity peak in the range of 300–350 K different from that of typical glass-formers of small molecules. In addition, σ goes up with increasing x, and the temperature corresponding to σ maximum increases with rising NaI content. Moreover, there is a nonlinear behavior of σ with x, i.e., with rising x, σ/x decreases at low-temperatures, but increases at high-temperatures. Moreover, the liquid structure and its variation with T are further analyzed based on the ionic conductivity.
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