Electrochemiluminescence of Tris(2,2'-bipyridine)ruthenium in Water at Carbon Microelectrodes.

Fiaccabrino, G C; Koudelka-Hep, M; Hsueh, Y T; Collins, S D; Smith, R L

Fiaccabrino, G C; Koudelka-Hep, M; Hsueh, Y T; Collins, S D; Smith, R L.

Afiliación

Fiaccabrino GC; Institute of Microtechnology, University of Neuchatel, 2007 Neuchatel, Switzerland, and Department of Electrical and Computer Engineering, University of California, Davis, California 95616.

Anal Chem ; 70(19): 4157-61, 1998 Oct 01.

Article en En | MEDLINE | ID: mdl-21651253

RESUMEN

Electrochemiluminescence (ECL) of Ru(bpy)(3)(2+) in water only, without any added electrolyte or reducing agents, has been obtained at carbon interdigitated microelectrode arrays (C-IDAs) of 2 µm width and spacing. In a generation/collection biasing mode, ECL can be clearly seen with the naked eye in normal room lighting at concentrations greater than 1 mM. Using a conventional photomultiplier tube (PMT), a detection limit of 10(-)(7) M Ru(bpy)(3)(2+) has been achieved for an electrode area of 0.25 mm(2). In comparison, the ECL intensity produced at Pt-IDA of the same geometry, under identical experimental conditions, was more than 300 times less. The ECL obtained at C-IDAs is attributed to the annihilation reaction of the reduced and oxidized forms of the Ru(bpy)(3)(2+) made possible due to the small electrode spacing.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Anal Chem Año: 1998 Tipo del documento: Article Pais de publicación: Estados Unidos

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