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A new mononuclear ruthenium(ii) complex, [Ru(dmbpy)(tptz)(Cl)](PF6) (where dmbpy = 4,4′-dimethyl-2,2′-bipyridine and tptz = 2,4,6-tris(2-pyridyl)-1,3,5-triazine), has been prepared and characterized by spectroscopic methods, cyclic voltammetry (CV), and single-crystal X-ray crystallography.

The peak potentials recorded were 170, 500 and 830 mV vs. Ag/AgCl/KCl sat for AA, NADH and FA, respectively. The peak currents were linearly dependent on AA, NADH and FA concentrations using square wave voltammetry (SWV) method at the ranges of 0.008-251, 1.0-650, and 3.0-700 mmol L À1 , with detection limits of 0.005, 0.5, and 1.0 mmol L À1 , respectively.

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Crystallographic data for [Ru(tptz)(CH 3 CN)Cl 2 ]•CH 3 CN•0.68H 2 O have been deposited with the Cambridge Crystallographic Data Centre, CCDC 1446155.

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