The switchable phosphorescence and delayed fluorescence of a new rhodamine-like dye through allenylidene formation in a cyclometallated platinum(<scp>ii</scp>) system
Shunan Zhao, Yifan Zhu, Ling Li, Véronique Guerchais, Julien Boixel, Keith Man‐Chung Wong
Abstract
steady-state and time-resolved spectroscopy studies. Exceptional near-infrared (NIR) phosphorescence and delayed fluorescence based on a rhodamine-like structure were observed at room temperature for the first time. The position of the alkyne communication bridge attached to the platinum(ii) unit was found to vary the lead(ii)-ion binding mode and also the possible resonance structure for metal-mediated allenylidene formation. The formation of a proposed allenylidene resonance structure was suggested to rationalize these phenomena.
Topics & Concepts
PhosphorescenceFluorescencePlatinumPhotochemistryRhodamineChemistryLigand (biochemistry)Rhodamine BOrganic chemistryCatalysisBiochemistryPhotocatalysisReceptorOpticsPhysicsLuminescence and Fluorescent MaterialsOrganic Light-Emitting Diodes ResearchMolecular Sensors and Ion Detection