Author(s)

Wagner Batista dos Santos^1*, Marcio Adriano Sousa Chagas¹, K.M.D. de Sousa¹, Daniel Tizo Costa², Luiz Alfredo Pavanin³

¹Institute of Exact and Earth Sciences, Federal University of Mato Grosso, Cuiabá, Brazil.
²FESURV, University of Rio Verde, Rio Verde, Brazil.
³Chemical Institute, Federal University of Uberlandia, Uberlandia, Brazil.

n this work, we present synthesis of the compounds trans-[Ru(NH₃)₄L(bpa)]²⁺ where L is pyridine ligands: pyridine (py), isonicotinamide (isn), 4-acetylpyridine (4-acpy) and 4-picoline (4-pic) and 1,2-bis (4-pyridyl) ethane (bpa), their characterization by UV-visible spectroscopy and electrochemical properties. This series shows intense bands in the region between 400 and 515 nm, allocated bands charge transfer (MLCT), the influence of substituents on the pyridine ring (4-acpy and isn), and the interaction between the ligand and the metal, causing a second MLCT band, which is lighter and has more energy. The compound is characterized by spectroscopy by Fourier transform infrared spectroscopy (FTIR). The displacement observed in the symmetrical stretching of ν_s(CCN) group in the complex compared with the ν_s(CCN) group in the free ligand is indicative of coordination of the pyridine group to the Ruthenium (II) metallic center. The electrochemical data (cyclic voltammetry) show that reversibility criteria are well defined and formal E_f potential, indicating the influence of the pyridine ring substituent.

Ruthenium, Pyridine Ligands, MLCT Bands

Santos, W. , Chagas, M. , de Sousa, K. , Costa, D. and Pavanin, L. (2016) Synthesis, Characterization, Spectral Properties and Electrochemical of Compounds trans-[Ru(NH)₃L(bpa)]²⁺. Open Journal of Inorganic Chemistry, 6, 135-145. doi: 10.4236/ojic.2016.62009.