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Perturbation of the tris(2,2′‐bipyridine) ruthenium(II)‐catalyzed Belousov–Zhabotinsky oscillating chemiluminescence reaction by l ‐cysteine and its application
Author(s) -
Liu Huimin,
Han Heyou
Publication year - 2009
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.1101
Subject(s) - ruthenium , chemiluminescence , induction period , chemistry , cysteine , tris , belousov–zhabotinsky reaction , catalysis , organic chemistry , biochemistry , enzyme
Perturbation of the tris(2,2′‐bipyridine)ruthenium(II) [Ru(bpy) 3 2+ ]‐catalyzed Belousov–Zhabotinsky (BZ) oscillating chemiluminescence (CL) reaction induced by l ‐cysteine was observed in the closed system. It was found that the CL intensity was decreased in the presence of l ‐cysteine. Meanwhile, oscillation period and oscillating induction period were prolonged. The sufficient reproducible induction period was used as parameter for the analytical application of oscillating CL reaction. Under the optimum conditions, the changes in the oscillating CL induction period were linearly proportional to the concentration of l ‐cysteine in the range from 8.0 × 10 −7 to 5.0 × 10 −5 mol L −1 ( r = 0.997) with a detection limit of 4.3 × 10 −7 mol L −1 . The possible mechanism of l ‐cysteine perturbation on the oscillating CL reaction was also discussed. Copyright © 2009 John Wiley & Sons, Ltd.