Award Date

1-1-2007

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

First Committee Member

Pradip K. Bhowmik

Number of Pages

77

Abstract

Several novel poly(pyridinium salt)s with oxyalkylene moieties in the main chain with bulky organic counterions (tosylate and triflimide) were prepared by either the ring-transmutation polymerization of phenylated bis(pyrylium tosylate) salt with a series of oxyalkylene containing diamines in dimethyl sulfoxide on heating for 48 h or the metathesis reaction of the corresponding tosylate polymer with lithium triflimide in methanol. Their chemical structures were determined by elemental analysis and 1H and 13 C NMR spectroscopy, and their polyelectrolyte behavior in dimethyl sulfoxide was determined by solution viscosity measurements. Their weight average molecular weights were in the range of 14,000-22,000 and polydispersity indices were in the range of 1.20-1.70 as determined by gel permeation chromatography. They were characterized for their thermotropic and lyotropic liquid-crystalline properties by using differential scanning calorimetry and polarizing light microscopy. Their light-emitting properties were also determined by using spectrofluorometry.

Keywords

Amphotropic; Characterization; Crystalline; Exhibiting; Liquid; Oxyalkylene; Ph; Photoluminescene; Poly; Properties; Pyridinium Salt; Synthesis; Units

Controlled Subject

Polymers; Polymerization; Chemistry

File Format

pdf

File Size

1546.24 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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