Solution, thermal and optical properties of new poly(pyridinium salt)s derived from bisquinoline diaminesThis article is dedicated to Professor Vernon F. Hodge with best wishes on the occasion of his 70th birthday.Electronic supplementary information (ESI) available: Schemes S1 and S2, NMR spectra and FTIR spectra. See DOI: 10.1039/c0py00037j

• Main Authors: Nedeltchev, Alexi K, Han, Haesook, Bhowmik, Pradip K
• Format: Article
• Language: English
• ISSN: 1759-9954; 1759-9962
• DOI: 10.1039/c0py00037j

Several novel poly(pyridinium salt)s with heterocyclic bisquinoline moieties having both tosylate and triflimide counterions were prepared by either ring-transmutation or metathesis reaction. Their chemical structures were established by using 1 H and 13 C NMR, FTIR and elemental analysis. Their number-average molecular weights ( M n ) ranged from 53,000 to 79,000 and their polydispersities ranged from 1.30 to 3.24 as determined by gel permeation chromatography. They had excellent thermal stabilities in the temperature range of 336-447 °C and glass transition temperatures in the range of 119-174 °C. They had good solubilities in common organic solvents and in several cases their critical concentrations (*C) were exceeded to form lyotropic liquid-crystalline phases. Additionally, they emitted light in the blue and green region in both solution and solid state. Their quantum yields were also determined by using a spectrofluorometer. Novel poly(pyridinium salt)s with bisquinoline moieties are prepared by a ring-transmutation polymerization reaction. They exhibit lyotropic liquid-crystalline phase and light-emitting properties.