Patent ID: 7229668
Filing Date: 2007-06-12
Classification: C09D,D01F,Y10T

Abstract:
1. A process for preparing, by electrochemical reduction, a carbon-containing material whose surface is modified with organic groups, which comprises placing the carbon-containing material in contact with an organic diazonium salt in solvent, optionally in the presence of an electrolyte, and negative polarization of the carbon-containing material relative to an anode which is also in contact with the solution of the organic diazonium salt or in contact with an electrolytic solution which is separate from the solution of the salt, wherein the electrochemical reduction is carried out on the organic diazonium salt in protic solvent in acidic medium, and wherein the organic diazonium salt is 4-nitrobenzenediazonium tetrafluoroborate, 3,3′-dimethoxybiphenyl-4,4′-bis(diazonium) dichloride of the following formula: 4-carboxymethylbenzenediazonium tetrafluoroborate, 1,4-benzenebis(diazonium) tetrafluoroborate, chlorobenzyl-4-diazonium tetrafluoroborate, or 4-chloromethylphenyldiazonium, 4-hydroxymethylphenyldiazonium, 4-carboxyphenyldiazonium, 4-formylphenyldiazonium, 4-acetylphenyldiazonium, 4-isothiocyanatophenyldiazonium, 4-N-FMOC-aminomethylphenyldiazonium, 4-(4-hydroxymethylphenoxymethyl)phenyldiazonium, 4-(2,4-dimethoxyphenyl-N-FMOC-aminomethyl)phenyldiazonium, 4-(phenyl-N-FMOC-aminomethyl)phenyl-diazonium, 4-(4-methylphenyl-N-FMOC-amynomethyl)phenyldiazonuum or 4-(4-nitrophenylcarbonyl)phenyldiazonium salt, or trityldiazonium chloride, 2-chlorotrityldiazonium chloride or trityldiazonium hydroxide, or 9-N-FMOC-aminoxanthen-3-yldiazonium, 4-(2,4-dimethoxyphenyl-hydroxymethyl)phenyldiazonium, 4-(4-hydroxymethylbenzoyloxymethyl)-phenyldiazonium, 4-(4-hydroxymethylbenzoylaminomethyl)phenyldiazonium or 4-(4-hydroxymethyl-3-methoxyphenoxymethyl)phenyldiazonium salt.