Controlled Zn-mediated grafting of thin layers of bipodal diazonium salt on gold and carbon substrates.
A controlled, rapid, and potentiostat-free method has been developed for grafting the diazonium salt (3,5-bis(4-diazophenoxy)benzoic acid tetrafluoroborate (DCOOH)) on gold and carbon substrates, based on a Zn-mediated chemical dediazonation. The highly stable thin layer organic platforms obtained were characterized by cyclic voltammetry, AFM, impedance, XP, and Raman spectroscopies. A dediazonation mechanism based on radical formation is proposed. Finally, DCOOH was proved as a linker to an aminated electroactive probe.
Departament d'Enginyeria Química, Universitat Rovira I Virgili, Avinguda Països Catalans, 26, 43007 Tarragona (Spain), Fax: (+34) 977559667, Fax: (+34) 977559721.
Mabel
M
Torréns
Mayreli
M
Ortiz
Anthony P F
AP
Turner
Valerio
V
Beni
Ciara K
CK
O'Sullivan
carbon; diazo compounds; gold; reduction; surface chemistry; zinc