Electrochemistry of non-redox-active poly(propylenimine) and poly(amidoamine) dendrimers at liquid-liquid interfaces

Langmuir : the ACS Journal of Surfaces and Colloids
Alfonso BerduqueDamien W M Arrigan

Abstract

The electrochemistry of a series of dendrimers was examined at the interface between two immiscible electrolyte solutions (ITIES), enabling study of non-redox-active dendrimers. Different generations of poly(propylenimine) (DAB-AM-n) and poly(amidoamine) (PAMAM) dendrimers were studied. In their protonated states, the dendrimers were transferred across the ITIES, with the electrochemical behavior observed depending on the dendrimer family, the generation number, and the experimental pH. The electrochemistry of the lower generations studied was characterized by well-defined peaks for both dendrimer families and with small peak-peak separations in the case of the PAMAM family. The voltammetry of the higher generations was more complex, showing distorted voltammograms and instability of the interface. The charges of the transferring dendrimers were calculated by convolution of the voltammetric data and were similar to the theoretical charges for DAB-AM-n. For PAMAM, only the lowest generation exhibited reversible behavior, with higher generations having irreversible behavior. Using cyclic voltammetry, low micromolar concentrations of the dendrimers were detected. The results show that electrochemistry at the ITIES can be a useful ...Continue Reading

Citations

Mar 24, 2009·Physical Chemistry Chemical Physics : PCCP·Micheál D ScanlonDamien W M Arrigan
Jun 11, 2010·Physical Chemistry Chemical Physics : PCCP·Micheál D ScanlonDamien W M Arrigan
Jan 9, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Hiroki SakaeHisanori Imura
May 20, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Hirohisa NagataniHisanori Imura
May 22, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Marcelo CalderonLidia M Yudi

Related Concepts

PAMAM dendrimer
poly(propyleneimine)
Conductometry
Electrode
Polyamines
Polypro
Dendrimers

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