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 homopoly mers. 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
Polythiophene diblock copolymer with different solvent affinities of the side-chain substituents: solvatochromism and effect on electronic conjugation / L. Angiolini; A. Brazzi; E. Salatelli; K. Van den Bergh; G. Koeckelberghs. - In: MACROMOLECULAR CHEMISTRY AND PHYSICS. - ISSN 1022-1352. - STAMPA. - 214:(2013), pp. 934-942. [10.1002/macp.201300002]
Polythiophene diblock copolymer with different solvent affinities of the side-chain substituents: solvatochromism and effect on electronic conjugation
SALATELLI, ELISABETTA;
2013
Abstract
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 homopoly mers. 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) copolymersI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
