Synthesis and characterization of all-conjugated diblock copolymers consisting of thiophenes with a hydrophobic alkyl and a hydrophilic alkoxy side chain

Autor:	Ayyanar Siva, Taiho Park, Jinseck Kim, In Young Song
Rok vydání:	2011
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Organic Chemistry Polymer chemistry.chemical_compound Monomer chemistry Polymerization Polymer chemistry Materials Chemistry Copolymer Alkoxy group Thiophene Side chain Alkyl
Zdroj:	Polymer. 52:3704-3709
ISSN:	0032-3861
DOI:	10.1016/j.polymer.2011.06.030
Popis:	Novel thiophene-based all-conjugated block copolymers consisting of 3-hexylthiophene and 3-{2-[2-(2-methoxyethoxy)ethoxy]ethoxy}thiophene were synthesized using the Grignard metathesis (GRIM) polymerization method in the presence of Ni(dppp)Cl2. Favorable transfer of the catalytic site from an electron-poor precursor to an electron-rich monomer was found to produce the block copolymer. The molecular weights of the copolymers increased slightly with increasing polymerization temperature (10.1 × 103 Mn (35 °C) → 11.1 × 103 Mn (55 °C)), suggesting that transit of the catalytic site was accelerated at high temperatures. Size exclusion chromatography, UV–vis and photoluminescence spectroscopies, and cyclic voltammetry measurements confirmed that the polymers were block copolymers. The blocks were associated and organized relative to one another in adjacent chains.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::22d27c7ec8f7215aa106f787b047cf91 https://doi.org/10.1016/j.polymer.2011.06.030 Zobrazit plný text záznamu Full Text from ScienceDirect