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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2562

Title: SYNTHESIS AND PARTIAL CHARACTERIZATION OF LADDER AND QUINOXALINE-BASED CO-FLUORENE LOW BANDGAP POLYMERS
Authors: Fiseha, Bogale
Advisors: Wendimagegn Mammo (Professor)
Keywords: SYNTHESIS
PARTIAL CHARACTERIZATION
Copyright: Jul-2009
Date Added: 4-May-2012
Publisher: AAU
Abstract: Thiophene-phenylene-thiophene fused heteroarene ladder-type monomeric unit which hinders “chain folding” and allows extended conjugation was synthesized along with two variants of quinoxaline-based donor-acceptor monomeric units. Subsequently the copolymerization between previously synthesized tetramethyl-1,3,2-dioxaborolane) these monomeric units and 2,2'-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(4,4,5,5- was effected by a modified Suzuki polymerization methodology. The copolymers were partially characterized using UV-vis absorption spectroscopy in both thin film and as chloroform solution, cyclic voltammetry and fluorescence spectroscopy, for their bandgap and quantum yield. The results from the electrochemical and spectroscopic analysis revealed a bandgap of 2.4, 2.1, and 1.9 eV for polymers 53, 54 and 55, respectively.
URI: http://hdl.handle.net/123456789/2562
Appears in:Thesis - Chemistry

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