One-pot synthesis of a white-light emissive bichromophore operated by aggregation-induced dual emission (AIDE) and partial energy transfer

Abstract

<p>Consecutive four-component insertion–alkynylation–amination–Suzuki sequence furnishes bichromophores that emit white light upon aggregation-induced dual emission (AIDE) operating by partial energy transfer between the constituting chromophores.</p>

Communication of Bichromophore Emission upon Aggregation – Aroyl‐S,N‐ketene Acetals as Multifunctional Sensor Merocyanines

“…The dual fluorescence can be coined to the AIE characteristics of both chromophores in juxtaposition with solvent‐induced changes of the spectral overlap of the emission of phenylenecarbazole acting as a donor and the aroyl‐ S,N ‐ketene acetal acting as an acceptor affecting the energy transfer efficiency. A partial (frustrated) energy transfer[ 4a , 11a , 24 ] from the phenylenecarbazole donor to the aroyl‐ S,N ‐ketene acetal acceptor may occur in the aggregate by both intra‐ and intermolecular energy transfer.…”

Heterocycles by Consecutive Multicomponent Syntheses via Catalytically Generated Alkynoyl Intermediates

“…The onepot three-component synthesis started from ortho-bromo anilidines 29 forming the indolone scaffold and phenylacetylene as alkyne component, before the piperazine analogue was added. Four propenylidene indolone bichromophores 30 examples in poor-to-good yields were furnished by the consecutive insertion-alkynylation-Michael addition sequence (Scheme 15) [72]. A further expanded sequence takes advantage of 1-(4-bromobenzyl)piperazine (31) in a modular strategy, enabling a Suzuki coupling as terminal step.…”

Tumore abbilden, Biomarker nachweisen, Messungen standardisieren

“…6) AIE-Luminophore sind im nichtaggregierten, monomeren Zustand nicht oder nur minimal lumineszent und schalten bei Aggregation ihre Emission an. 7) Dies lässt sich unter anderem für waschschrittfreie Markierungen und Analytnachweise einsetzen 7) sowie um Weißlicht zu erzeugen 8) Vor kurzem wurden d8-Metall-Verbindungen wie Pt II -und Pd II -Komplexe entwickelt, die eine ligandenkontrollierte Aggregation und eine aggregationskontrollierte Emissionsintensität und -farbe zeigen (Abbildung 1). 9) Dies eignet sich für farbbasierte Sauerstoffsensorik und um Biomarker oder Krankheitserreger nachzuweisen.…”