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Highly electron-deficient 3,6-diaza-9-borafluorene scaffolds for the construction of luminescent chelate complexes
Jan Adamek1, Paulina H Marek-Urban1,2, Krzysztof Woźniak2
1Faculty of Chemistry, Warsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland krzysztof.durka@pw.edu.pl sergiusz.lulinski@pw.edu.pl.
Abstract:
The synthesis and characterization of two fluorinated 3,6-diaza-9-hydroxy-9-borafluorene oxonium acids featuring improved hydrolytic stability and the strong electron-deficient character of the diazaborafluorene core is reported. These boracycles served as precursors of fluorescent spiro-type complexes with (O,N)-chelating ligands which revealed specific properties such as delayed emission, white light emission in the solid state and photocatalytic performance in singlet oxygen-mediated oxidation reactions.
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