Solid-state reduction of silver nitrate with polyaniline base leading to conducting materials
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
20355813
DOI
10.1021/am900320t
Knihovny.cz E-resources
- MeSH
- Aniline Compounds chemistry MeSH
- Time Factors MeSH
- Models, Chemical MeSH
- Silver Nitrate chemistry MeSH
- Electric Conductivity MeSH
- Oxygen chemistry MeSH
- Chemistry, Organic methods MeSH
- Polymers chemistry MeSH
- Spectrum Analysis, Raman methods MeSH
- Spectroscopy, Fourier Transform Infrared methods MeSH
- Silver chemistry MeSH
- Materials Testing MeSH
- Microscopy, Electron, Transmission methods MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- aniline MeSH Browser
- Aniline Compounds MeSH
- Silver Nitrate MeSH
- Oxygen MeSH
- polyaniline MeSH Browser
- Polymers MeSH
- Silver MeSH
The polyaniline (PANI) base was ball-milled with silver nitrate in the solid state. Samples were prepared at various mole ratios of silver nitrate to PANI constitutional units ranging from 0 to 1.5 for three processing times, 0, 5, and 10 min. The emeraldine form of PANI was oxidized to pernigraniline, and the silver nitrate was reduced to metallic silver. Nitric acid is a byproduct, which may protonate the residual emeraldine and pernigraniline. The changes occurring in the structure of PANI are discussed on the basis of Fourier transform IR and Raman spectroscopies. Raman spectra revealed the formation of pernigraniline salt. The reaction between the two nonconducting components, emeraldine base and silver nitrate, produced a mixture of two conducting components, emeraldine or pernigraniline nitrate and metallic silver. The accompanying conductivity changes were determined. The increase in the conductivity of the original base, 10(-9) S cm(-1), up to 10(-2) S cm(-1) was found to depend on the mole ratio of silver nitrate to PANI base and on the processing time of the components in the ball mill.
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