Derivatization of carbon
AssigneeSchlumberger Technology Corporation
InventorsKay McGuinness, Nathan Lawrence
Life of this patent
Estimating the term…
Abstract
Chemical modification of the surface of elemental carbon comprises a first stage of attaching a compound with an azo group to the elemental carbon and then a second stage of decomposing the azo group in the presence of one or more compounds with an olefinic group so that decomposition of the azo group forms radicals attached to the carbon surface and a said radical forms a covalent bond to a said olefinic group. The second stage may proceed as a polymerization of a vinyl monomer with a redox active group such as ferrocene, anthracene or anthraquinone. The resulting polymer-modified carbon may be used in an electrochemical sensor.
Claims8
A process for chemical modification of the surface of elemental carbon comprising
- attaching a compound which contains an azo group and which has a formula
- R1—N═N—R2
- where the groups R1 and R2 are aromatic groups, to the elemental carbon so as to provide groups of the formula
- —N═N—R2
- attached to the carbon surface through linking groups each of which contains at least part of R1 and which are attached to the carbon surface, and then
- decomposing the azo group in the presence of one or more further compounds which contain an olefinic group so that decomposition of the azo group forms radicals and a said radical forms a covalent bond to a said olefinic group, so that the one or more further compounds become attached to the elemental carbon through the linking groups.
Dependencies are inferred from the claim text.