Chemiluminescence Detection of Five-membered Heteroaromatic Compounds Using Electrogenerated Tris(2,2'-bipyridine)-ruthenium(III)
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Heteroaromatic compounds, such as 2,5-dimethylthiophene, 2,5-dimethylpyrrole, and 2,5-dimethylfuran, were found to act as reducing agents for the tris(2,2′-bipyridine)ruthenium(III), Ru(bpy)<sub>3</sub><sup>3+</sup>, chemiluminescent reaction. In order to characterize the chemiluminescent reaction of Ru(bpy)<sub>3</sub><sup>3+</sup> with heteroaromatic compounds, we have investigated various mono-, di-, and tri-heteroaromatic compounds. The π-electron density and stability of aromatic rings influence the chemiluminescent efficiency of the reaction. Above all, 2,5-dimethylthiophene produced strong chemiluminescence under acidic conditions. In addition, we confirmed that the rate of the chemiluminescent reaction of Ru(bpy)<sub>3</sub><sup>3+</sup> with 2,5-dimethylthiophene is very fast.
- Analytical Sciences
Analytical Sciences 23(4), 407-411, 2007-04-10
The Japan Society for Analytical Chemistry