Premium
Polythiophene Diblock Copolymer with Different Solvent Affinities of the Side‐Chain Substituents: Solvatochromism and Effect on the Electronic Conjugation
Author(s) -
Angiolini Luigi,
Brazzi Alice,
Salatelli Elisabetta,
Van den Bergh Karlien,
Koeckelberghs Guy
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201300002
Subject(s) - solvatochromism , polythiophene , copolymer , side chain , polymer chemistry , materials science , substituent , alkoxy group , thiophene , solvent , polymer , photochemistry , chemistry , organic chemistry , conductive polymer , alkyl , composite material
A new diblock copolymer composed of a regioregular block of poly[3‐[2‐(2‐methoxyethoxy)ethoxy]methylthiophene], bearing as side‐chain a hydrophilic substituent, and a regioregular block of poly[3‐(1‐octyloxy)thiophene], is prepared and characterized. The properties are compared with those of a related copolymer composed of poly(3‐hexylthiophene) and poly(3‐alkoxythiophene) blocks. The solvatochromic properties of these materials in solution are investigated by absorption and emission spectroscopy upon gradual addition of a poor solvent, and compared with those of the parent regioregular homopolymers. The experimental results are interpreted in terms of electronic interactions between the blocks. It is found that the different hydrophilicity of the side chain plays a crucial role for the electronic communication between blocks in poly(3‐alkylthiophene)‐ block ‐poly(3‐alkoxythiophene) copolymers.