Novel poly(3-hexylthiophene)-based copolymer prepared via click chemistry approach
Date Issued
2007
Date
2007
Author(s)
Lee, Wei-Lun
DOI
zh-TW
Abstract
A novel route for preparing poly(3-hexylthiophene)-based core shell like copolymer via click chemistry approach has been developed. First, regioregular ethynyl group ended poly(3-hexylthiophene)s (P3HT) were synthsized using a ethynyl-terminated Grignard reagent. Then, multifunctional initiators for atom transfer radical polymerization (ATRP) were prepared by reacting molecules containing three, six, or twelve hydroxyl groups with 2-bromoisobutyryl bromides to yield the corresponding 2-bromoisobutyrates moiety. The starburst poly(methyl acrylate)s (PMA) were produced by using these initiators in a controlled manner by ATRP, and the ω-bromo ends of these star polymers were subsequently modified to generate the same number of azide functional groups in the presence of trimethylsilylazide (TMS-N3). Finally, the PMA core and P3HT shell were combined to form core shell like diblock copolymers by click reaction. Chemical structure and molecular weight characteristics of these copolymers were studied by IR、1H & 13C NMR、GPC and MALDI-TOF techniques.
The core shell like diblock copolymers were well soluted in chloroform. The UV-visible absorption spectra (UV-vis) showed the λmax=450nm, and the photoluminescence spectra (PL) showed the light emission wavelength were about 575nm. By comparing the UV-vis and PL spectra, the optical properties of these copolymers are the same as pure P3HT.
Subjects
原子轉移自由基聚合
P3HT
click
conducting polymer
starburst polymer
ATRP
Type
thesis
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