PMID- 18476667 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20080804 LR - 20080612 IS - 0743-7463 (Print) IS - 0743-7463 (Linking) VI - 24 IP - 12 DP - 2008 Jun 17 TI - Functionalization of glassy carbon with diazonium salts in ionic liquids. PG - 6327-33 LID - 10.1021/la703714a [doi] AB - The paper reports on the chemical functionalization of glassy carbon electrodes with 4-bromobenzene (4-BBDT) and 4-(4'-nitrophenylazo)benzene diazonium tetrafluoroborate (4-NAB) salts in ionic liquids. The reaction was carried out at room temperature in air without any external electrical bias in either hydrophobic (1-butyl-3-methylimidazolium hexafluorophosphate) or hydrophilic (1-butyl-3-methylimidazolium methyl sulfate) ionic liquids. The resulting surfaces were characterized using X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and electrochemical measurements. Electrochemical reduction of the terminal nitro groups allowed the determination of surface coverage and formation of an amine-terminated carbon surfaces. The results were compared to glassy carbon chemically modified in an aqueous solution in the presence of 1% sodium dodecyl sulfate (SDS) with the same diazonium salt. Furthermore, Raman spectroscopy coupled with electrochemical measurements allowed to distinguish between the reduction of -NO2 to -NH2 group and the -N=N- to -NH-NH- bond. FAU - Actis, Paolo AU - Actis P AD - Laboratoire d'Electrochimie et de Physicochimie des Materiaux et des Interfaces, CNRS-INPG-UJF, 1130 Rue de la Piscine, BP 75, 38402 St. Martin d'Heres Cedex, France. FAU - Caulliez, Guilain AU - Caulliez G FAU - Shul, Galyna AU - Shul G FAU - Opallo, Marcin AU - Opallo M FAU - Mermoux, Michel AU - Mermoux M FAU - Marcus, Bernadette AU - Marcus B FAU - Boukherroub, Rabah AU - Boukherroub R FAU - Szunerits, Sabine AU - Szunerits S LA - eng PT - Journal Article DEP - 20080513 PL - United States TA - Langmuir JT - Langmuir : the ACS journal of surfaces and colloids JID - 9882736 EDAT- 2008/05/15 09:00 MHDA- 2008/05/15 09:01 CRDT- 2008/05/15 09:00 PHST- 2008/05/15 09:00 [pubmed] PHST- 2008/05/15 09:01 [medline] PHST- 2008/05/15 09:00 [entrez] AID - 10.1021/la703714a [doi] PST - ppublish SO - Langmuir. 2008 Jun 17;24(12):6327-33. doi: 10.1021/la703714a. Epub 2008 May 13.