The reflective, gold-colored surface layer produced on reduction of poly(tetrafluoroethylene) (PTFE) films with benzoin dianion in dimethyl sulfoxide (Me2SO) has previously been reported to be a reactive form of carbon. In this work the material has been prepared on the surfaces of polycrystalline PTFE films and powder. It was characterized by resonance-enhanced Raman scattering, photoacoustic Fourier transform infrared spectroscopy, and electron microscopy. The resonance Raman spectrum indicates that the reduced PTFE surface contains trans-polyacetylene (trans-(CH)x) with polyene conjugation lengths consisting of 12–28 olefin units. trans-(CD)x is formed when Me2SO-d6 is used as the reaction solvent, indicating that the protons on the polyacetylene originate from the solvent used in the reduction reaction. Infrared spectra also show the presence of a lesser amount of a carbonaceous fraction composed of aromatic rings and C=C bonds.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry