title: Luminescent bichromophoric spiroindolones--synthesis and electronic properties.
abstract: Novel bichromophoric spirocyclic indolones have been synthesized by an insertion-coupling-isomerization-Diels-Alder domino reaction. The emission colors are strongly affected by the substituents: N-Boc leads to intense blue fluorescence, N-dansyl causes turquoise emission, whereas a 1-anthryl substituent on the butadiene results in yellow luminescence. The latter behavior is rationalized by TDDFT computations as a result of significant geometrical changes.
authors.affiliation: Lehrstuhl für Organische Chemie, Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Schönhaber
authors.forename: Thomas J J
authors.initials: TJ
authors.lastname: Müller