Application of the Generalized Molar-Ratio Method to the Determination of the Stoichiometry and Apparent Binding Constant of Nanoparticle-Organic Capping Systems

作者：Domenech Carbo Antonio^*; Gonzalez Bejar Maria; Perez Prieto Julia

来源：Electroanalysis, 2015, 27(10): 2302-2312.

DOI：10.1002/elan.201500232

• Metal nanoparticles
• Stoichiometry
• Apparent binding constant
• Molar-ratio method
• Cucurbituril

A generalization of the molar-ratio method is applied to the determination of the stoichiometry and apparent binding constant of metal nanoparticle-organic capping complexes (MmLx) using voltammetric data for the oxygen reduction reaction (ORR) in air-saturated aqueous phosphate buffer solutions. The method is applied to the formation of binary nanohybrids consisting of gold nanoparticles (AuNPs) capped with a rigid spacer, cucurbit[7]uril (CB), termed AuNP@CB, as well as to the formation of their ternary complexes (MmLxBz) with methylene blue (MB), termed AuNP@CB@MB. The obtained stoichiometries correspond to binding of four Au surface atoms for each CB unit.

• 出版日期2015-10