2022
DOI: 10.1002/ange.202212571
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Lichtgesteuerte Konstruktion und Zerstörung: Schaltung zwischen zwei unterschiedlich zusammengesetzten käfigartigen Komplexen

Abstract: Wir berichten über zwei regioisomere Diazocinliganden 1 und 2, die beide mit violettem und grünem Licht zwischen den E-und Z-Konfigurationen geschaltet werden können. Die Selbstorganisation der vier Spezies (1-Z, 1-E, 2-Z, 2-E) mit Co II -Ionen wurde nach Änderung der Koordinationsvektoren in Abhängigkeit von der Ligandenkonfiguration (E vs. Z) und dem Regioisomer (1 vs. 2) untersucht. Mit 1-Z bildet sich Co 2 (1-Z) 3 , während mit 2-Z ein undefiniertes Gemisch verschiedener Spezies (Oligomere) beobachtet wurd… Show more

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“…The Herges group reported the self-assembly and interconversion of a similar supramolecular system containing the regioisomeric 2-pyridyltriazole-substituted diazocine ligands L2 and L3 together with Co II ions. 10b Even though both ligands Z - L2 and Z - L3 show similar bite angles (61° and 63°), the cage [Co 2 ( Z - L2 ) 3 ] 4+ assembles exclusively, whereas the regioisomeric congener Z - L3 does not assemble into well-defined structures (Figure 3 ) when both ligands are mixed. Irradiating the cage and ligands at 385 nm induces Z → E isomerization to give [Co 2 ( E - L3 ) 3 ] 4+ and free E - L2 .…”
Section: Photoswitchable Dissipative Supramolecular Systemsmentioning
confidence: 99%
“…The Herges group reported the self-assembly and interconversion of a similar supramolecular system containing the regioisomeric 2-pyridyltriazole-substituted diazocine ligands L2 and L3 together with Co II ions. 10b Even though both ligands Z - L2 and Z - L3 show similar bite angles (61° and 63°), the cage [Co 2 ( Z - L2 ) 3 ] 4+ assembles exclusively, whereas the regioisomeric congener Z - L3 does not assemble into well-defined structures (Figure 3 ) when both ligands are mixed. Irradiating the cage and ligands at 385 nm induces Z → E isomerization to give [Co 2 ( E - L3 ) 3 ] 4+ and free E - L2 .…”
Section: Photoswitchable Dissipative Supramolecular Systemsmentioning
confidence: 99%