Solution, thermal and optical properties of new poly(pyridinium salt)s derived from conjugated quinoline diamines

Several new poly(pyridinium salt)s with quinoline diamine moieties in their backbones with tosylate and triflimide counterion were prepared by either a ring‐transmutation polymerization reaction with bis(pyrylium tosylate) with a series of isomeric quinoline diamines in dimethyl sulfoxide (DMSO) for...

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Bibliographic Details
Published in:Journal of polymer science. Part A, Polymer chemistry Polymer chemistry, 2011-04, Vol.49 (8), p.1907-1918
Main Authors: Nedeltchev, Alexi K., Han, Haesook, Bhowmik, Pradip K., Ma, Longzhou
Format: Article
Language:English
Subjects:
Acetal resins
Applied sciences
Backbone
Diamines
Exact sciences and technology
light-emitting diode (LED)
Molecular structure
NMR
optics
Organic polymers
Physicochemistry of polymers
Polymerization
Polymers with particular properties
Preparation, kinetics, thermodynamics, mechanism and catalysts
Quinoline
Reproduction
Scanning electron microscopy
structure-property relations
TEM
UV-vis spectroscopy
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Summary:Several new poly(pyridinium salt)s with quinoline diamine moieties in their backbones with tosylate and triflimide counterion were prepared by either a ring‐transmutation polymerization reaction with bis(pyrylium tosylate) with a series of isomeric quinoline diamines in dimethyl sulfoxide (DMSO) for 48 h at 130–140 °C or a metathesis reaction of the tosylate polymers with lithium triflimide in DMSO at about 60 °C. Their chemical structures were confirmed by FTIR, 1H and 13C NMR spectroscopy, and elemental analysis. Their number‐average molecular weights (Mn) were in the range of 18,000–58,000, and their polydispersities were in the range of 1.12–1.53 as determined by gel permeation chromatography. They had thermal stability in the temperature range of 353–455 °C and glass‐transition temperatures >240 °C. They had good solubility in common organic solvents and were characterized with polarizing optical microscopy (POM) studies for their lyotropic liquid‐crystalline properties. Their light‐emission properties were examined by spectrofluorometry in both the solution and film states. Their quantum yields were also determined. Additionally, their morphologies in the thin‐film states and melt‐drawn fibers were examined with POM, scanning electron microscopy, and transmission electron microscopy techniques. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011 Several novel poly(pyridinium salt)s with heterocyclic quinoline moieties in their backbones with tosylate and triflimide counterions were synthesized by either ring‐transmutation polymerization reaction or metathesis reaction. They were characterized for both lyotropic liquid‐crystalline and light‐emitting properties by a number of experimental techniques. Additionally, the morphologies of their fibers and films were also examined with microscopic techniques including polarizing optical microscopy, scanning electron microscopy, and transmission electron microscopy.
ISSN:0887-624X
1099-0518
1099-0518
DOI:10.1002/pola.24619