LOW-PRESSURE-INDUCED CONFORMATIONAL TRANSITION IN DOPED POLYPYRROLE -OPTICAL AND IR-SPECTRA

Authors
FEDORKO P SKAKALOVA V HULMAN M KOVAC S FOLTIN O VEGH D
Citation
P. Fedorko et al., LOW-PRESSURE-INDUCED CONFORMATIONAL TRANSITION IN DOPED POLYPYRROLE -OPTICAL AND IR-SPECTRA, Advanced materials for optics and electronics, 8(2), 1998, pp. 81-85
Citations number
20
Categorie Soggetti
Material Science",Optics,"Engineering, Eletrical & Electronic","Chemistry Applied",Chemistry
Journal title
Advanced materials for optics and electronics → ACNP
ISSN journal
10579257
Volume
8
Issue
2
Year of publication
1998
Pages
81 - 85
Database
ISI
SICI code
1057-9257(1998)8:2<81:LCTIDP>2.0.ZU;2-9
Abstract
A pressure dependence of the optical absorption spectra of BF4- 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 accompani ed by an increase in the low-energy absorption and its shift towards l ower energies. The Fourier transformation infrared reflection spectra also depend on the pressure in this region of pressures. The results a re interpreted as a pressure-induced conformational transition of the polypyrrole chain, (C) 1998 John Wiley & Sons, Ltd.