Perturbation of the tris(2,2'-bipyridine) ruthenium(II)-catalyzed Belousov-Zhabotinsky oscillating chemiluminescence reaction by L-cysteine and its application.
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 x 10(-7) to 5.0 x 10(-5 )mol L(-1) (r = 0.997) with a detection limit of 4.3 x 10(-7) mol L(-1). The possible mechanism of L-cysteine perturbation on the oscillating CL reaction was also discussed.
College of Science, the State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
Huimin
H
Liu
Heyou
H
Han
D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives* / Q000737:chemistry; D002138:Calibration; D002384:Catalysis; D056831:Coordination Complexes; D003545:Cysteine / Q000737:chemistry*; D057230:Limit of Detection; D049449:Luminescence; D017975:Ruthenium Compounds
D015082:2,2'-Dipyridyl; D056831:Coordination Complexes; D003545:Cysteine; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds