Dioctylamine-sulfonamide-modified carbon nanoparticles as high surface area substrates for coenzyme Q10-lipid electrochemistry

Reference:

Lawrence, K., Watkins, J. D., James, T. D., Taylor, J. E., Bull, S. D., Nelson, G. W., Foord, J. S., Long, Y. T. and Marken, F., 2012. Dioctylamine-sulfonamide-modified carbon nanoparticles as high surface area substrates for coenzyme Q10-lipid electrochemistry. Electroanalysis, 24 (5), pp. 1003-1010.

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Official URL:

http://dx.doi.org/10.1002/elan.201200121

Abstract

Dioctylaminesulfonamide-modified carbon nanoparticles are characterised and employed as high surface area substrate for (i) coenzyme Q10 and (ii) 1,2-dimyristoyl-sn-glycero-3-phosphocholine (or DMPC) - Q10 redox processes. The carbon nanoparticles provide a highly hydrophobic substrate with ca. 25Fg -1 capacitance when bare. Q10 or DMPC-Q10 immobilised onto the carbon nanoparticles lower the capacitance, but give rise to well-defined pH-dependent voltammetric responses. The DMPC-Q10 deposit shows similar characteristics to those of Q10, but with better reproducibility and higher sensitivity. Both redox systems, Q10 and DMPC-Q10, are sensitive to the Na + concentration in the electrolyte and mechanistic implications are discussed.

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