Effect of substitution group on dielectric properties of 4H-pyrano [3, 2-c] quinoline derivatives thin films
Zeyada H M1, El-Taweel F M2, El-Nahass M M3, El-Shabaan M M1, †, 
Frequency dependence of the AC electrical conductivity for (a) Ph-HPQ and (b) Ch -HPQ at various temperatures.
