title: Novel carbazole-pyridine copolymers by an economical method: synthesis, spectroscopic and thermochemical studies.
abstract: The synthesis, as well as spectroscopic and thermochemical studies of a novel class of carbazole-4-phenylpyridine co-polymers are described. The synthesis was carried out by a simple and cheaper method compared to the lengthy methods usually adopted for the preparation of carbazole-pyridine copolymers which involve costly catalysts. Thus, two series of polymers were synthesized by a modified Chichibabin reaction, i.e., by the condensation of diacetylated N-alkylcarbazoles with 3-substituted benzaldehydes in the presence of ammonium acetate in refluxing acetic acid. All the polymers were characterized by FTIR, (1)H NMR, (13)C NMR, UV-vis spectroscopy, fluorimetry, TGA and DSC. The weight average molecular masses (M(w)) of the polymers were estimated by the laser light scattering (LLS) technique.
authors.affiliation: Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
authors.forename: Aamer
authors.initials: A
authors.lastname: Saeed
authors.forename: Madiha
authors.initials: M
authors.lastname: Irfan
authors.forename: Shahid Ameen
authors.initials: SA
authors.lastname: Samra