Study on the Formation of a Supramolecular Conjugated Graft Copolymer in Solution

作者：Hardeman Tine; Willot Pieter; De Winter Julien; Josse Thomas; Gerbaux Pascal; Shestakova Pavletta; Nies Erik; Koeckelberghs Guy^*

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2014, 52(6): 804-809.

DOI：10.1002/pola.27060

• conjugated polymers
• DOSY
• graft copolymers
• hydrogen bonding
• supramolecular structures

The formation in solution of a supramolecular graft copolymer bearing conjugated blocks is demonstrated using diffusion ordered NMR spectroscopy (DOSY). A tailor-made poly(3-(2-ethylhexyl)thiophene) (P3EHT) with a phenol end group is synthesized. For this purpose, the chain-growth mechanism of the polymerization of 2-bromo-5-chloromagnesio-3-alkylthiophenes in the presence of a Ni(dppp) catalyst (dppp=1,3-bis(triphenylphosphino)propane) is exploited, as it enables the use of functionalized initiators to introduce specific end groups. The so-obtained polythiophene was subsequently mixed in solution with poly(4-vinylpyridine) (P4VP) to enable phenol-pyridine hydrogen bonding. The formation of the supramolecular graft copolymer is studied using DOSY-measurements. Based on the results thereof, the amount of P3EHT attached to the P4VP is calculated and the association constant of the hydrogen bond is estimated.

• 出版日期2014-3-15