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