†. H. Lu, H. Chan, S. Ng
Feb 8, 2003
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0
Influential Citations
44
Citations
Journal
Macromolecules
Abstract
A novel series of conjugated polymers comprising alternating π-excessive bis(3-alkylthiophene) and π-deficient 2,5-pyridine (or 2,6- or 3,5-pyridine) moieties were synthesized using a Stille coupling approach and characterized by FT-IR, NMR, UV−vis, fluorescence spectroscopy, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), electrochemical analysis, and X-ray photoelectron spectroscopy (XPS). The derived polymers were highly soluble in common organic solvents and trifloroacetic acid. The electronic and optical properties of these polymers were closely related to the polymer backbone structures. Polymers containing 2,6-/3,5-pyridine moieties exhibited blue shifts in UV and fluorescent spectra relative to those containing 2,5-pyridine analogues, and polymers containing 3,5-pyridine units depicted the highest thermal stability, UV absorption energy, fluorescence energy, and reduction potentials. The electrochemical behavior of these new polymers showed facile n-doping and p-doping prope...