[Study on electrochemical kinetics of matrine and sophoridine in a physiological medium].
OBJECTIVE
To investigate the kinetic processes of direct electrooxidation for both matrine and sophoridine in a physiological medium.


METHODS
Their direct electrooxidative behaviors and the parameters of electrochemical kinetics were obtained by cyclic voltammetry (CV), bulk electrolysis with coulometry, chronocoulometry (CC), chronoamperometry (CA).


CONCLUSIONS
The electrochemical experimental results show that the two totally irreversible oxidation peaks in the region of 0.3-1.2 V vs SCE for both MT and SR were observed, and the electrode reactions processes were diffusion-controlled. Their electron transfer number n and electron transfer coefficient alpha were obtained by CV and electrolysis with coulometry. The diffusion coefficient D and rate constant kf were also calculated by CC and CA.
Gao
Zuo-ning
ZN
College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, China. gaozn@nxu.edu.cn
Yao
Hui-qin
HQ
Han
Xiao-xia
XX
Yu
Jian-qiang
JQ
D000470:Alkaloids / Q000737:chemistry* / Q000302:isolation & purification; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D007700:Kinetics; D010084:Oxidation-Reduction; D010946:Plants, Medicinal / Q000737:chemistry; D011807:Quinolizines / Q000737:chemistry* / Q000302:isolation & purification; D029909:Sophora / Q000737:chemistry; D000093842:Matrines
D000470:Alkaloids; D011807:Quinolizines; D000093842:Matrines