Nonlinear Optical Chromophores with Configuration-Locked Polyenes Possessing Enhanced Thermal Stability and Chemical Stability

Linear Monodisperse π-Conjugated Oligomers: Model Compounds for Polymers and More

“…This configurational and conformational locking furnished NLO chromophores that possessed significantly enhanced thermal stability. [90] A more detailed overview of the recent experimental and theoretical progress in the field of nonlinear optics dealing with oligomeric and polymeric chromophores can be found in references [8, 91 ± 95].…”

“…[ Scheme 29. Functionalized oligo(a-thiophene)s with phototoxic (89) [242] and electron transfer activity (90,91). [243,244] Oligo(a-thiophene)s have also been used as conjugated linkers between donor ± acceptor systems to study intramolecular energy transfer properties, and exhibit several intriguing advantages, when compared to oligoene spacers, such as improved thermal and chemical stabilities, higher fluorescence quantum yields, large degree of p-electron delocalization along the conjugated chain, and the inability to cis ± trans isomerize.…”

A–D–A‐Type Oligothiophenes for Small Molecule Organic Solar Cells: Extending the π‐System by Introduction of Ring‐Locked Double Bonds

“…Reagents and Chemicals : 2,5‐Bis(trimethylstannyl)thiophene 1, 5,5′‐bis(trimethylstannyl)‐2,2′‐bithiophene 2, 3‐bromocyclohex‐2‐enone 3, 3‐methoxy‐2‐cyclohex‐2‐enon 7, and 2,5‐bis(trimethylstannyl)‐3,4‐dimethylthiophen 10 were prepared according to published literature procedures. 2,5‐Dibromothiophene 6 was purchased from Aldrich.…”

Lineare monodisperse π-konjugierte Oligomere: mehr als nur Modellverbindungen für Polymere

“…Als Folge der konfigurativen und konformativen Starrheit wurden NLO-Chromophore erhalten, die thermisch deutlich stabiler waren. [90] Ein ausführlicher Überblick über den jüngsten experimentellen und theo-…”

“…[239] Unter den funktionalisierten Oligo(a-thiophenen) [240] und entsprechenden S,S-Dioxiden [241] sind Methylsulfanylverbindungen des Typs 89 (Schema 29) von besonderem Interesse, Schema 29. Funktionalisierte Oligo(a-thiophene) mit phototoxischer (89) [242] und Elektronentransferaktivität (90,91). [243,244] da sie als Photosensibilisatoren die Bildung von Singulettsauerstoff ( 1 O 2 ) katalysieren und hohe phototoxische Aktivitäten gegenüber Nematoden, Insektenlarven und -eiern, Bakterien, Algen und Pilzen aufweisen.…”