Supramolecular organization in fluorene/indenofluorene-oligothiophene alternating conjugated copolymers
Surin, Mathieu, Sonar, Prashant, Grimsdale, Andrew. C., Müllen, Klaus, Lazzaroni, Roberto, & Leclère, Philippe (2005) Supramolecular organization in fluorene/indenofluorene-oligothiophene alternating conjugated copolymers. Advanced Functional Materials, 15(9), pp. 1426-1434.
A series of conjugated copolymers containing fluorene or indenofluorene units alternating with oligothiophene segments, with potential interest for use as the active layer in field-effect transistors, is investigated. Atomic force microscopy analysis of the morphology of thin deposits shows either the formation of fibrillar structures, which are the signature of long-range π stacking, or the presence of untextured aggregates, resulting from disordered assembly. These morphologies are interpreted in terms of the supramolecular organization of the conjugated chains. Molecular modeling simulations indicate that the commensurability between the lengths of the monomer units and the presence of alkyl side groups are the two key structural factors governing the chain organization into highly ordered assemblies. The most favorable structures are those combining fluorene (indenofluorene) units with unsubstituted bithiophene (terthiophene) segments.
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|Item Type:||Journal Article|
|Keywords:||Atomic force microscopy, Computer simulation, Deposits, Field effect transistors, Monomers, Morphology, Supramolecular chemistry, Conjugated copolymers, Fibrillar structures, Untextured aggregates, Organic polymers|
|Divisions:||Current > QUT Faculties and Divisions > Science & Engineering Faculty|
|Copyright Owner:||Copyright 2005 Wiley - V C H Verlag GmbH & Co. KGaA|
|Deposited On:||21 Aug 2014 03:20|
|Last Modified:||25 Aug 2014 02:15|
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