Differentiating between ortho- and para-quinone surface groups on graphite, glassy carbon, and carbon nanotubes using organic and inorganic voltammetric and x-ray photoelectron Spectroscopy labels

作者：Thorogood Charles A; Wildgoose Gregory G; Crossley Alison; Jacobs Robert M J; Jones John H; Compton Richard G^*

来源：Chemistry of Materials, 2007, 19(20): 4964-4974.

DOI：10.1021/cm071412a

ortho-Quinones can be differentiated from other oxygen-containing surface functional groups on the surfaces of graphite, glassy carbon, "bamboo-like", and "hollow-tube" multiwalled carbon nanotubes and single-walled carbon nanotubes by chemically labeling them with either an inorganic hexamminechromium(III) complex or organic 1,2-phenylenediamine derivatives. Both types of labels can be observed using cyclic voltammetry or by X-ray photoelectron spectroscopy and used to quantify the numbers and relative distribution of ortho-quinones from other oxygen-containing species on the surface including electroactive para-quinones which are not labeled. Labeling of ortho-quinones with 1,2-phenylenediamine derivatives results in the formation of phenazine-like adducts on the graphitic surface which have a distinct voltammetry particularly from that of the underivatized para-quinones.

• 出版日期2007-10-2