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Emergence of Paramagnetism in Organic Macromolecules during Synthesis |
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| Authors: | Kaushik Mallick Michael Witcomb Rudolph Erasmus André Strydom |
| Institution: | 1. Advanced Materials Division , Mintek , Randburg, South Africa;2. Microscopy and Microanalysis Unit , University of the Witwatersrand , WITS, South Africa;3. School of Physics , University of the Witwatersrand , WITS, South Africa;4. Physics Department , University of Johannesburg , Auckland Park, South Africa |
| Abstract: | Paramagnetism in polyaniline can be generated during synthesis if cerium (IV) ammonium nitrate (CAN) is used as a polymerizing (oxidizing) agent. During the reaction, in situ formation of Ce3+ ions are doped in the spherical polyaniline particles and show paramagnetic behavior throughout the experimental temperature range (400–1.9 K). The result indicated that the Ce3+ ions covalently functionalized with the chain nitrogen of the polyaniline. |
| Keywords: | cerium ammonium nitrate paramagnetism polyaniline SEM |