Abstract

GARCIA POSSE, M. E. et al. A new building block for polynuclear complexes: the ion [Ru(bptz)(CN)4]2- ( bptz = 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine). An. Asoc. Quím. Argent. [online]. 2004, vol.92, n.1-3, pp.101-107. ISSN 0365-0375.

The synthesis and physicochemical properties of the new mononuclear ruthenium(II) complex, of formula Na2[Ru(bptz)(CN)4].4H2O (bptz = 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine) are reported. The IR and UV-vis spectral data, together with cyclic voltammetry measurements, indicate that the ligand bptz has a π-acceptor ability intermediate between dpp and bpz when coordinated to the tetracyanoruthenate(II) moiety (dpp = 2,3-bis(2'-pyridyl)pyrazine ; bpz = 2,2'-bipyrazine). This complex can be used as a photosensitizer, since it emits at room temperature in alcoholic solutions, and as a building block for new polynuclear complexes, such as the symmetric ion [(CN)4Ru(bptz)Ru(CN)4]4-, whose preparation and spectral properties in aqueous solutions are also described in this work.

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