ELECTROABSORPTION SPECTROSCOPY OF RIGID-ROD POLYMERS PBZT AND PBTPV

Authors
MARTIN SJ BRADLEY DDC OSAHENI JA JENEKHE SA
Citation
Sj. Martin et al., ELECTROABSORPTION SPECTROSCOPY OF RIGID-ROD POLYMERS PBZT AND PBTPV, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 256, 1994, pp. 583-589
Citations number
9
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
256
Year of publication
1994
Pages
583 - 589
Database
ISI
SICI code
1058-725X(1994)256:<583:ESORPP>2.0.ZU;2-U
Abstract
The rigid rod polymers poly(p-phenylenebenzobisthiazole) and poly(benz obisthiazole-p-phenylenebisvinylene) have been prepared as thin film s amples by spin coating Lewis acid complexes from solution and regenera ting the uncomplexed polymer by washing with water and drying in vacuo . This approach allows fabrication of films that show well resolved vi bronic structure in their linear absorption spectra In this paper we p resent results of linear- and electro-absorption spectra From the latt er we are able to deduce the average exciton radius which we find to b e 13 Angstrom in PBZT and 15 Angstrom in PBTPV. The average change in polarisability accompanying the lowest energy pi-pi optical transitio n is also determined. Comparison of our results is made with previous studies.