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Characterization and Properties of a Polythiophene with a Malonic Acid Dimethyl Ester Side Group by Elaine Armelin; Oscar Bertran; Francesc Estrany; Roser Salvatella; Carlos Alemán is a Materials Science article available to read on EtoBox.

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A new polythiophene derivative bearing a malonic acid dimethyl ester substituent attached to the 3-position of the repeat unit has been prepared by chemical oxidative-coupling polymerization. The chemical structure of poly(2-thiophen-3-yl-malonic acid dimethyl ester) has been analyzed by FTIR and 1 H NMR spectroscopy and, additionally, the distribution of the head-to-tail and head-to-head diads arising from polymerization was found to be a 75-25%. The glass transition temperature identified for this polymer was 17.6 °C lower than that recently determined for a closely related polythiophene derivative, in which the ester substituent arose from acrylic acid rather than from malonic acid. On the other hand, the electrical conductivity of the new material, which was soluble in polar solvents but not in water, was higher than that typically found for poly(3-alkylthiophene) derivatives. Ab initio quantum mechanical calculations on simple model compounds were used to predict the regiochemistry of the polymer chain, which was in excellent agreement with the experimental observation, and the conformational preferences of both the inter-ring dihedral angle and the bulky side group. Interesti

Who reads Characterization and Properties of a Polythiophene with a Malonic Acid Dimethyl Ester Side Group?

Author

Elaine Armelin; Oscar Bertran; Francesc Estrany; Roser Salvatella; Carlos Alemán

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0014-3057)

Published

2009

Language

EN

Field

Materials Science (Physical Sciences)