Title
Synthesis and Characterization of a Ruthenium(II) Complex for the Development of Supramolecular Photocatalysts Containing Multidentate Coordination Spheres
Author
Fabian L. Huber, Djawed Nauroozi, Alexander K. Mengele, Sven Rau
Year
2017
Journal
European Journal of Inorganic Chemistry
Abstract
The synthesis of the new bis-heteroleptic RuII complex [(tbbpy)2Ru(dptpphz)](PF6)2 (7), that exhibits a tetradentate coordination sphere for a second metal centre, and its characterization are presented. The complex shows similar photostability and redox properties regarding the first ligand-centred reductions compared to its tpphz analogue. Concentration-dependent NMR investigations were performed and a dimerization constant (KD = 83 ± 5) could be calculated, which was significantly lower than that of other tpphz systems. Photophysical investigations reveal a stabilizing effect of the two electron-withdrawing 2-pyridyl substituents on π–π* transition of the phenazine sphere. The typical H2O-induced light-switch effects have also been observed. To further highlight the potential of the tetradentate coordination site, the ZnII adduct of 7 was prepared and preliminary studied.
Instrument
FP-8500
Keywords
Fluorescence, Inorganic chemistry, Chemical stability