Abstract
Fabricartion of a redox-active electrode by modification of a glassy carbon electrode (GCE) with a unique ionic liquid derived fibrillated mesoporouscarbon (IFMC) following the electrografting of 4-phenylurazole viaelectrochemical reduction of 4-(4-nitrophenyl)urazole in the presence of sodium nitrite has been described. The resulted electrode shows the prominent electrochemical performance. The efficiency of the electrode has been evaluated over the entire range of pHs. The oxidized form of ungrafted 4-phenyluazole, 4-phenyl-1,2,4-triazoline-3,5-dione, is highly unstable due to fast ring cleavage. In contrast to oxidation of the ungrafted 4-phenylurazole, the electrografted 4-phenyl-1,2,4-triazoline-3,5-dione exhibits a high stability in a wide range of pHs. The anchored 4-phenyl-1,2,4-triazoline-3,5-dione groups are reactive against Michael-type addition. Further modification of the electrode can be achieved by the Michael-type addition reaction of the triazolinedione groups with nucleophiles at the solid/liquid interface.