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Electrogenerated Chemiluminescence Based on Tris(2,2′-bipyridyl) Ruthenium(II) with Hydroxyl Carboxylic Acid

✍ Scribed by Xi Chen; Wei Chen; Yaqi Jiang; Li Jia; Xiaoru Wang

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
116 KB
Volume
59
Category
Article
ISSN
0026-265X

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✦ Synopsis

Upon the electrochemical oxidation of tris(2,2Ј-bipyridyl) ruthenium(II) [Ru(bpy) 3 2ϩ ] and hydroxyl carboxylic acids, for instance, citric acid, tartaric acid, malic acid, and D-gluconic acid, bright electrochemiluminescences (ECLs) were observed. Different luminescent reactions were presented depending on the applied potential. The light emission was mainly caused by the reaction between alkoxide radical ion and Ru(bpy) 3 3ϩ below the potential ϩ1.80 V (vs Ag/AgCl). The luminescence intensity obviously increased because of the more complex reaction process. The luminescence wavelength of 608 nm, which could be found either at higher potential than ϩ1.80 V or in the potential range from ϩ1.30 to ϩ1.80 V, confirmed that ECL was caused by Ru(bpy) 3 2ϩ *. The factors which affect the determination and HPLC separation of the four acids were also investigated.

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