||Molecular association between flavin derivatives and dendritic polymers at the water|1,2-dichloroethane interface
Sakae, Hiroki ,
Fujisawa, Masataka ,
Nagatani, HirohisaImura , Hisanori
Journal of Electroanalytical Chemistry
292 , 2016-12-01 , Elsevier B.V.
The ion transfer and adsorption mechanism of flavin derivatives, riboflavin (RF) and flavin mononucleotide (FMN), at the polarized water|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|DCE interface. Spectroelectrochemical analysis through potential-modulated fluorescence spectroscopy demonstrated that the dendrimer-bound flavin derivatives were transferred across the water|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. © 2016 Elsevier B.V.
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