Bibliographic Details
| Title: |
Temperature dependence of the electrical conductivity in 4, 4′ bis(2-thenylideneamino)biphenyl and 4, 4′ bis(thenyldiphenyl-phosphinylmethyleneamino)biphenyl compounds. |
| Authors: |
El-Sayed, B.1, El-Nawawy, M.1, Abd Ellah, E.1, Farag, R.1 |
| Source: |
Journal of Materials Science. Jun1999, Vol. 34 Issue 11, p2715-2718. 4p. |
| Subjects: |
Electric conductivity, Biphenyl compounds, Temperature, Molecular structure, Band gaps |
| Abstract: |
Correlation of the molecular structure and utilizing measurements of the electrical conductivity, activation energy of conduction of 4,4′ bis(2-thenylideneamino)biphenyl (SB) and 4,4′ bis(thenyl-diphenylphosphinylmethyleneamino)biphenyl (OPSB) compounds have been carried out. The results of the activation energies, obtained from the electrical conductivity measurements, as well as the energy gaps calculated from ultraviolet (u.v.) and visible spectra in the solid state indicate that the investigated compounds behave like semiconducting materials. The delocalized π-electrons in addition to the lone pairs of electrons on the nitrogen atoms of the two compounds as well as the donor effect of diphenylphosphinyl groups of OPSB compound were considered as the main sources participating in the conduction processes. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
