RUTHENIUM(II) TRIS-(2,2'-BIPYRIDINE)-SPECIFIC EXTRINSIC LYOLUMINESCENCES OF X-RAY-IRRADIATION COLORED AND ELECTROLYTICALLY COLORED ALKALI-HALIDES

Short-lived solid/solution interfaces, which are sufficiently energeti c to initiate the radiative (3)MLCT-based transition of ruthenium(II) tris-(2,2'-bipyridine) chelate, can be produced by dissolving x-ray ir radiation colored or electrolytically colored alkali halides in water. This study discusses in detail the mechanisms of these ruthenium(II) tris-(2,2'-bipyridine)-specific extrinsic lyoluminescences of x-ray ir radiated sodium chloride and electrolytically colored potassium chlori de and, in addition, points out its analytical feasibility; air-equili brated sample solutions can be used because of a weak quenching effect of dissolved oxygen on the Ru(bpy)(3)(2+)-specific lyoluminescences, calibration curves with linear ranges of 5 orders of magnitude and wit h the detection limits of approximately 1 X 10(-10) M have been obtain ed for the Ru(bpy)(3)(2+) determinations by using the aforementioned l yoluminescence excitation sources. In particular, the electrolytically colored potassium chloride in the presence of peroxydisulfate provide s the excitation source for the ultimate trace analysis of ruthenium(I I) tris-(2,2'-bipyridine) in aqueous solutions, mainly because of its good long term stability, and low inherent intrinsic lyoluminescence w hich results in a good signal-to-noise ratio for this lyoluminescent d etection.