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- Title
Ruthenium Complexes Containing 2,2′-Bipyridine and 1,3,5-Triaza-7-phosphaadamantane.
- Authors
Scalambra, Franco; Serrano‐Ruiz, Manuel; Nahim‐Granados, Samira; Romerosa, Antonio
- Abstract
Water-soluble complexes cis-[Ru(bpy)2(PTA)2]Cl2 ( 1Cl2), cis-[Ru(bpy)2(PTA)2](PF6)2 [ 1(PF6)2], trans-[Ru(bpy)2(PTA)2](CF3SO3)2 [ 2(CF3SO3)2], cis-[Ru(bpy)2(PTA)(H2O)](CF3SO3)2 [ 3(CF3SO3)2], cis-[Ru(bpy)2(PTAH)(H2O)](CF3SO3)3 ·2CF3SO3H [ 4(CF3SO3)3 ·2CF3SO3H], cis-[Ru(bpy)2(PTAH)2](CF3SO3)4 ·4CF3SO3H [ 5(CF3SO3)4 ·4CF3SO3H], and trans-[Ru(bpy)2(PTAH)2](CF3SO3)4 ·4CF3SO3H [ 6(CF3SO3)4 ·4CF3SO3H] (bpy = 2,2′-bipyridyl; PTA = 1,3,5-triaza-7-phosphaadamantane) have been synthesized and characterized by elemental analysis, NMR, and IR spectroscopy. The crystal structures of 1(PF6)2, 2(CF3SO3)2, and 3(CF3SO3)2 were obtained by single-crystal X-ray diffraction. Both experimental and computational techniques were utilized to perform a detailed analysis of the structural and electronic properties of complexes 1 and 2 in water in both the deprotonated and protonated state and under N2 and air. Luminescence studies showed that these complexes are active fluorescence compounds, despite the presence of monophosphines in their structure. The pH sensitivity of the emission band of both complexes and their photohydrolysis in acidic water solution was studied. Both complexes release a PTA molecule under selective irradiation in acidic water to give complex 4. Cyclic voltammetry showed that, in water, irreversible anodic oxidation corresponding to the RuII/RuIII redox process occurs for 1, whereas for 2 the process is quasi-reversible, while in N, N-dimethylformamide for both complexes they are irreversible and occur at lower potential than in water.
- Subjects
RUTHENIUM compounds; BIPYRIDINIUM compounds; NUCLEAR magnetic resonance spectroscopy; INFRARED spectroscopy; SINGLE crystals spectra; X-ray diffraction; OXIDATION-reduction reaction
- Publication
European Journal of Inorganic Chemistry, 2016, Vol 2016, Issue 10, p1528
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.201501357