A Study on Synthesis and Properties of Functionalised Soluble Derivatives of Polythiophene
Date Issued
2007
Date
2007
Author(s)
Chang, Yu-Hsin
DOI
en-US
Abstract
Owing to the good solubility, processability, environmental stability, structural versatility, and other interesting properties, thiophene-based compounds have progressively emerged as a key system for the development of the conjugated polymers. The introduction of flexible pendants chains onto the backbone improves the stability and processability allowing a more complete characterization of the materials. Also such introduction modifies the electronic properties of the polymer enlarging the possibilities for industrial applications.
In this study, the monomer, 3,4-dihexyloxythiophene(DHOT), with characters of soluble and electron-releasing hexyloxy side chains, was synthesized. The derivatives of polythiophene based on DHOT were prepared. The homopolymer based on DHOT, PDHOT, had good solubility in many organic solvents, such as CHCl3, toluene, DCB, and had low band gaps of ca. 1.44 e.V in polymer solution and of ca. 1.42 e.V in the thin film.
There were less literatures on functionalised low band gap conjugated polymers. We copolymerized DHOT with functional monomers, 3-thienylacetonitril or 3-thiopheneethanol, in order to develop a low band gap conjugated polymers functionalised. These functionalised copolymers had band gaps of ca. 2 e.V, and they were soluble in common organic solvents. We also analysed the thermal properties, optoelectronic properties in this study to provide the preliminary study for potential applications.
Subjects
低能隙
推電子基
可溶性
官能基化
聚噻
吩
polythiophene
low band gap
electron-releasing group
soluble
functionalised
Type
thesis