Molecular association between flavin derivatives and dendritic polymers at the water vertical bar 1,2-dichloroethane interface

作者：Sakae Hiroki; Fujisawa Masataka; Nagatani Hirohisa^*; Imura Hisanori

来源：Journal of Electroanalytical Chemistry, 2016, 782: 288-292.

DOI：10.1016/j.jelechem.2016.10.052

• Flavin derivatives
• Interface between two immiscible electrolyte solutions (ITIES)
• PAMAM dendrimer
• Hyperbranched polymer
• Potential-modulated fluorescence (PMF)

The ion transfer and adsorption mechanism of flavin derivatives, riboflavin (RF) and flavin mononucleotide (FMN), at the polarized water vertical bar 1,2-dichloroethane (DCE) interface were studied in the presence of the fourth generation (G4) amino-terminated polyamidoamine (PAMAM) dendrimer or hyperbranched bis-MPA polyester-64-hydroxyl (HBP). The flavin derivatives associated with the positively charged G4 PAMAM dendrimer both in the aqueous solution and at the water vertical bar DCE interface. Spectroelectrochemical analysis through potential-modulated fluorescence spectroscopy demonstrated that the dendrimer-bound flavin derivatives were transferred across the water vertical bar DCE interface in the positive potential region, while the interfacial adsorption of flavin derivatives in the negative potential region was effectively inhibited by the competitive adsorption of the neutral G4 HBP molecules.

• 出版日期2016-12-1