DC Electrical Conductivity of Some Oligoazomethines Doped with Nanotubes
| Autor: | Sama Al-Aghbari, Salem Aqeel, Omar Al-Shuja'a, Abeer Obeid, Ali El-Shekeil |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Polymers and Plastics Annealing (metallurgy) General Chemistry Electronic structure Conductivity Atmospheric temperature range Oligomer chemistry.chemical_compound chemistry Electrical resistivity and conductivity Polymer chemistry Materials Chemistry Ceramics and Composites Physical chemistry Molecule Benzene |
| Zdroj: | Journal of Macromolecular Science, Part A. 49:116-123 |
| ISSN: | 1520-5738 1060-1325 |
| DOI: | 10.1080/10601325.2012.641906 |
| Popis: | Three aromatic oligoazomethines containing seven benzene rings each were synthesized. The terminal rings were substituted with different organic groups; namely, OH, H, and NO2. Synthesis was carried out according to the literature by condensing the para-substituted benzaldehydes with benzidine to give the three rings compound, which is then condensed with terephthaldehyde to give the respective seven benzene rings oligomer. The oligomers were used to investigate the effects of molecular structure on the electronic structure, as well as electronic and electrical properties. DC electrical conductivity variation of oligoazomethines is studied in the temperature range 300–500 K after annealing for 24 h at 100°C and after doping with 25 and 50 wt% Multi Wall Nanotubes (MWNTs). An attempt is made to relate DC electrical conductivity and electronic properties to chain length, substituted groups and coplanarity. The different groups attached to the ends showed a small effect on conductivity of the different oligo... |
| Databáze: | OpenAIRE |
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