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Low-pressure-induced conformational transition in doped polypyrrole: optical and IR spectra

✍ Scribed by P. Fedorko; V. Skákalová; M. Hulman; S˘. Kováč; O. Foltin; D. Végh

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
104 KB
Volume
8
Category
Article
ISSN
1616-301X

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✦ Synopsis

A pressure dependence of the optical absorption spectra of BF À 4 -doped polypyrrole has been observed at pressures below atmospheric pressure. The two absorption bands at photon energies of 1.2 and 3.0 eV depend on the pressure: a decrease in the high-energy absorption is accompanied by an increase in the low-energy absorption and its shift towards lower energies. The Fourier transformation infrared reflection spectra also depend on the pressure in this region of pressures. The results are interpreted as a pressure-induced conformational transition of the polypyrrole chain.

📜 SIMILAR VOLUMES

Low-pressure-induced conformational tran
Low-pressure-induced conformational transition in doped polypyrrole: electrical conductivity
✍ V. Skákalová; P. Fedorko; D. Végh 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 96 KB

We describe the observation of a pressure-induced variation in the electrical conductivity of BF 2 4doped polypyrrole at pressures below atmospheric pressure. We also show that there are anomalies in the temperature dependence of the electrical conductivity in cyclic measurements at temperatures of