Electrochemical oxidation of caffeic acid in the presence of 1,4-benzenediboronic acid: CEC mechanism and glucose effect on the complex formation

• Published in: Journal of the Iranian Chemical Society Vol. 17; no. 4; pp. 935 - 942
• Main Authors: Beiginejad, Hadi, Rafiee, Zeinab, Moradi, Mohammad
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2020; Springer Nature B.V
• Subjects: Acids; Analytical Chemistry; Aqueous solutions; Benzoquinone; Biochemistry; Chemistry; Chemistry and Materials Science; Complex formation; Dimerization; Electrochemical analysis; Electrochemical oxidation; Glucose; Inorganic Chemistry; Organic Chemistry; Original Paper; Oxidation; Physical Chemistry; Voltammetry; CEC mechanism; 1,4-Benzenediboronic acid-caffeic acid complex; Glucose; Caffeic acid
• ISSN: 1735-207X; 1735-2428
• DOI: 10.1007/s13738-019-01827-8

In the current investigation, the electrochemical oxidation of caffeic acid (CA) in the absence and presence of 1,4-benzenediboronic acid (BDA) was studied. The voltammetric study indicates that CA ( 1 ) oxidized to its o -benzoquinone ( 1ox ) within a two-electron process. In basic pHs, the electrochemically generated 1ox is unstable and participates in the dimerization reaction. The results indicate that BDA reacts with CA, and a complex is produced. By the use of cyclic voltammetry, the electrochemical behavior of CA–BDA complex has been studied in aqueous solution. It was found that the electrochemical mechanism of the produced CA–BDA complex is CEC . Also, the electrochemical study of the CA–BDA complex was studied in the presence of glucose. The results show that the tendency of BDA to form the complex with CA decreases due to the addition of glucose, and the anodic peak of CA–BDA complex decreases with the increasing concentration of glucose.