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Polymerizable Well‐Defined Oligo(thiophene amide)s and their ROMP Block Copolymers

2009; Wiley; Volume: 30; Issue: 14 Linguagem: Inglês

10.1002/marc.200900207

1521-3927

Stefan Hilf, Johannes Klos, Kookheon Char, Heeje Woo, Andreas F. M. Kilbinger,

Polydiacetylene-based materials and applications

We report the synthesis of conjugated thiophene amide oligomers that constitute a new class of chromophores with potential for optoelectronic applications. The synthesis of defined norbornene-substituted oligothiophene amides using conventional coupling chemistry is described. Their electronic properties depend on the degree of oligomerization as UV/Vis and fluorescence spectroscopy demonstrate. A significant red shift in the spectra upon an increase in the oligomer length evidences conjugation of the thiophene rings via the amide linkages. ROMP of the norbornene-substituted oligomers gives homopolymers and block-copolymers with a solubilizing second block. The amphiphilic character of the block copolymers is used to study micellization and bulk self-organization.