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Synthesis and Characterization of a Ruthenium(II) Complex for the Development of Supramolecular Photocatalysts Containing Multidentate Coordination Spheres
Author(s) -
Huber Fabian L.,
Nauroozi Djawed,
Mengele Alexander K.,
Rau Sven
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201700565
Subject(s) - chemistry , denticity , coordination sphere , ruthenium , supramolecular chemistry , ligand (biochemistry) , adduct , phenazine , coordination complex , metal , transition metal , proton nmr , photochemistry , redox , crystallography , stereochemistry , combinatorial chemistry , inorganic chemistry , organic chemistry , crystal structure , catalysis , biochemistry , receptor
The synthesis of the new bis‐heteroleptic Ru II complex [(tbbpy) 2 Ru(dptpphz)](PF 6 ) 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 H 2 O‐induced light‐switch effects have also been observed. To further highlight the potential of the tetradentate coordination site, the Zn II adduct of 7 was prepared and preliminary studied.