6533b7dcfe1ef96bd1273359
RESEARCH PRODUCT
Erweiterte Konjugation in unsymmetrischen Stilbenylsquarainen
Herbert MeierRalf PetermannUta Dullwebersubject
chemistry.chemical_compoundAbsorption spectroscopychemistryIntramolecular forceBathochromic shiftAlkoxy groupSquaric acidSolubilityPhotochemistryMedicinal chemistryCoupling reactiondescription
Extended Conjugation in Stilbenylsquaraines Unsymmetrical 1-aryl-3-stilbenylsquaraines 2a–e and 1,3-bis(stilbenyl)squaraines 3a–c were prepared by CC coupling reactions of the corresponding substituted arenes with derivatives of squaric acid (Schemes 2 and 3). Dialkylamino and alkoxy groups enhance the solubility of these dyes and enlarge the intramolecular charge transfer of these donor–acceptor–donor systems. The extended conjugation of the stilbene units – in comparison with arene building blocks – leads to significant bathochromic shifts in the Vis/NIR absorption spectra.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-01-01 | Journal f�r Praktische Chemie/Chemiker-Zeitung |