Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-47599 Zeitschriftenartikel Schoder, S.; Schröder, H. V.; Cera, L.; Puttreddy, R.; Güttler, Arne; Resch-Genger, Ute; Rissanen, K.; Schalley, C. A. Strong Emission Enhancement in pH-Responsive 2:2 Cucurbit[8]uril Complexes Organic fluorophores, particularly stimuli-responsive molecules, are very interesting for biological and material sciences applications, but frequently limited by aggregation- and rotation-caused photoluminescence quenching. A series of easily accessible bipyridinium fluorophores, whose emission is quenched by a twisted intramolecular charge-transfer (TICT) mechanism, is reported. Encapsulation in a cucurbit[7]uril host gave a 1:1 complex exhibiting a moderate emission increase due to destabilization of the TICT state inside the apolar cucurbituril cavity. A much stronger fluorescence enhancement is observed in 2:2 complexes with the larger cucurbit[8]uril, which is caused by additional conformational restriction of rotations around the aryl/aryl bonds. Because the cucurbituril complexes are pH switchable, this system represents an efficient supramolecular ON/OFF fluorescence switch. Weinheim WILEY-VCH Verlag GmbH & Co. KGaA 2019 Chemistry - A European Journal 25 13 3257 3261 10.1002/chem.201806337 2019-03-21 OPUS4-38270 Zeitschriftenartikel Unger, Wolfgang; Schwarz, F.; Heinrich, Thomas; Kaufmann, J. O.; Lippitz, Andreas; Puttreddy, R.; Rissanen, K.; Schalley, C. A. Photocontrolled on-surface pseudorotaxane formation with well-ordered macrocycle multilayers The photoinduced pseudorotaxane formation between a photoresponsive axle and a tetralactam macrocycle was investigated in solution and on glass surfaces with immobilized multilayers of macrocycles. In the course of this reaction, a novel photoswitchable binding station with azobenzene as the photoswitchable unit and diketopiperazine as the binding station was synthesized and studied by NMR and UV/Vis spectroscopy. Glass surfaces have been functionalized with pyridine-terminated SAMs and subsequently withmultilayers of macrocycles through layer-by-layer self assembly. A preferred orientation of the macrocycles could be confirmed by NEXAFS spectroscopy. The photocontrolled Deposition of the axle into the surface-bound macrocycle-multilayers was monitored by UV/Vis spectroscopy and led to an increase of the molecular order, as indicated by more substantial linear dichroism effects in angle-resolved NEXAFS spectra. Weinheim Wiley-VCH Verlag GmbH & Co. KGaA 2016 Chemistry A European Journal 22 40 14383 14389 10.1002/chem.201603156 2016-11-16