新規ルテニウム(II)錯体/ナフィオン膜修飾電極の電解発光応答とその安定性

概要

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Two novel ruthenium (II) complexes (Ru^II) having four positive charges were prepared so as to be strongly incorporated into a Nafion film. Complex A is a bis-Ru^II complex bound with a long alkyl chain and Complex B is a Ru^II having two pyridinium pendants. A flow-through detector using Ru^II/Nafion-coated Au electrdodes was applied for the determination of amino acids. The Complex A electrode more strongly responded to proline than did the Ru(bpy)_3^2+ electrode, and showed a more stable response than did the Ru(bpy)_3^2+ electrode. On the other hand, the Complex B electrode showed almost the same response profile for amino acids as did the Ru(bpy)_3^2+ electrode. The response intensity was 1/60-times less strong than that of the Complex A electrode, perhaps due to the consumption of a strong reducing agent which may have been generated from oxidation of amino acids.
2002-12-05