Thermal and ac electrical properties of N-METHYLANTHRANILIC ACID (cas 119-68-6) below room temperature
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Add time:08/28/2019 Source:sciencedirect.com
In this study, we investigated the thermal and alternating current (ac) electrical properties of N-METHYLANTHRANILIC ACID (cas 119-68-6). Based on data obtained by differential scanning calorimetry, we detected two endothermic transitions at ≈ 213 K and ≈265.41 K. The weakening of hydrogen bonds as the temperature increased appeared to be the main cause of these phase transitions. We also recorded the melting point at about 475.5 K. Both the ac conductivity (σac) and complex dielectric constant (ε∗=ε'−jε'') were studied as functions of temperature over the frequency range from 1 kHz to 100 kHz. We observed significant variations in the thermal and electrical properties before and after the transition temperature at 265.41 K. The conduction mechanism responsible for the ac electrical properties before this transition was due to overlapping large polarons. These novel results are expected to have impacts on the application of organic semiconductors and dielectrics.
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