ISSN:
1434-193X
Keywords:
Cyclic voltammetry
;
Fluorescence spectroscopy
;
Mixed oligomers
;
Structure-property relationships
;
Organic light-emitting diodes
;
Oligothiophenes
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
---Novel mixed oligoheterocycles 1-5, containing thiophene/thiazole, thiophene/1,3,4-thiadiazole, thiophene/oxazole, or thiophene/1,3,4-oxadiazole moieties, were synthesized. The introduction of electronegative heteroatoms such as oxygen and nitrogen into the conjugated π-system leads to a more pronounced acceptor character than that found in the analogous oligothiophenes. Characterization of the redox properties reveals that the reduction of the mixed oligomers is facilitated while oxidation is shifted to higher potentials. For this series, clear structure-property relationships could be found by comparing optical properties, in particular absorptions, emissions and fluorescence quantum yields in solution. The X-ray structural determination of mixed thiophene/1,3,4-oxadiazole heptamer 5 indicates that the replacement of thiophene units by 1,3,4-oxadiazoles has a strong influence on the molecular arrangement and intermolecular interactions in the solid state.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
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