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Electrochemiluminescence of the Ru(bpy) 3 2+ /S 2 O 8 2– System in Purely Aqueous Solution at Carbon Paste Electrode
Author(s) -
Xu Guobao,
Dong Shaojun
Publication year - 2000
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(200005)12:8<583::aid-elan583>3.0.co;2-l
Subject(s) - electrochemiluminescence , aqueous solution , electrode , carbon fibers , chemistry , inorganic chemistry , ruthenium , materials science , photochemistry , organic chemistry , composite material , catalysis , composite number
The electrochemiluminescence (ECL) of the Ru(bpy) 3 2+ /S 2 O 8 2– system in purely aqueous solution at a carbon paste electrode can be clearly seen with the naked eye for Ru(bpy) 3 2+ concentrations higher than 1 mmol L –1 . The log–log plot of the emmitted light intensity vs. Ru(bpy) 3 2+ concentration is linear over the region 10 –3 –10 –7 mol L –1 with a correlation coefficient of 0.997. The ECL intensity increases linearly with the S 2 O 8 2– concentration from 10 –6 mol L –1 up to 0.3 mmol L –1 and drops off sharply at concentrations higher than 1 mmol L –1 . In addition, a weak ECL signal was obtained when the potential was biased more negative than –0.6 V even in the absence of S 2 O 8 2– .