6533b7dafe1ef96bd126f3cf
RESEARCH PRODUCT
Chiral donor–π-acceptor azobenzene dyes
Tero TuuttilaJuhani HuuskonenKari RissanenJarkko Lipsonensubject
Azo compoundProcess Chemistry and TechnologyGeneral Chemical EngineeringCarbon-13 NMRPhotochemistryAcceptorchemistry.chemical_compoundchemistryAzobenzenePolymer chemistryProton NMRMoleculeThermal stabilityChirality (chemistry)description
Abstract Four chiral donor–π-acceptor azobenzene dye conjugates were synthesized and characterized. Chiral moieties, namely (S)-(+)-2-(6-methoxy-2-naphthyl)propionic acid (naproxen) and (S)-2-aminopropionic acid ( l -alanine), were attached to either the donor end or the acceptor site of the azo compound using ester or amide bonds, respectively. The structures of the molecules were verified using 1H NMR, 13C NMR and ESI TOF mass spectrometry; spectral properties were evaluated with UV–vis and CD spectrometry whilst thermal stability was determined by TGA. The compounds displayed a broad absorption maximum in the visible region between 433 and 483 nm. All compounds showed relatively high thermal stability, decomposition temperatures being ∼200 °C.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-01 | Dyes and Pigments |