Application of the Generalized Molar‐Ratio Method to the Determination of the Stoichiometry and Apparent Binding Constant of Nanoparticle‐Organic Capping Systems |
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| Authors: | Antonio Doménech‐Carbó María González‐Béjar Julia Pérez‐Prieto |
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| Institution: | 1. Departamento de Química Analítica, Universidad de Valencia, 46100 Burjassot, Spain;2. Instituto de Ciencia Molecular (ICMol)/Departamento de Química Orgánica, Universidad de Valencia, 46980 Paterna, Spain |
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| Abstract: | 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, cucurbit7]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. |
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| Keywords: | Metal nanoparticles Stoichiometry Apparent binding constant Molar‐ratio method Cucurbituril |
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