Research

Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide


Reference:

Watkins, J. D., Lawrence, R., Taylor, J. E., Bull, S. D., Nelson, G. W., Foord, J. S., Wolverson, D., Rassaei, L., Evans, N. D. M., Gascon, S. A. and Marken, F., 2010. Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide. Physical Chemistry Chemical Physics, 12 (18), pp. 4872-4878.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below. (Contact Author)

Official URL:

http://dx.doi.org/10.1039/b927434k

Abstract

The surface functionalities of commercial sulfonate-modified carbon nanoparticles (ca. 9-18 nm diameter, Emperor 2000) have been converted from negatively charged to positively charged via sulfonylchloride formation followed by reaction with amines to give suphonamides. With ethylenediamine, the resulting positively charged carbon nanoparticles exhibit water solubility (in the absence of added electrolyte), a positive zeta-potential, and the ability to assemble into insoluble porous carbon films via layer-by-layer deposition employing alternating positive and negative carbon nanoparticles. Sulfonamide-functionalised carbon nanoparticles are characterised by Raman, AFM, XPS, and voltammetric methods. Stable thin film deposits are formed on 3 mm diameter glassy carbon electrodes and cyclic voltammetry is used to characterise capacitive background currents and the adsorption of the negatively charged redox probe indigo carmine. The Langmuirian binding constant K = 4000 mol(-1) dm(3) is estimated and the number of positively charged binding sites per particle determined as a function of pH.

Details

Item Type Articles
CreatorsWatkins, J. D., Lawrence, R., Taylor, J. E., Bull, S. D., Nelson, G. W., Foord, J. S., Wolverson, D., Rassaei, L., Evans, N. D. M., Gascon, S. A. and Marken, F.
DOI10.1039/b927434k
DepartmentsFaculty of Science > Chemistry
Faculty of Science > Physics
RefereedYes
StatusPublished
ID Code18892

Export

Actions (login required)

View Item