Modification of indium-tin oxide (ITO) glass with aziridine provides a surface of high amine density.
The surface of indium-tin oxide (ITO) substrates was successfully modified with aziridine. Modification of the surface was achieved through facile ring-opening, and hyperbranching polymerization of the ring-strained heterocycle initiated from the reactive group on the surface. Amine density of the aziridine-modified ITO measured with UV-vis spectrophotometry is 10 amines/nm2. Cyclic voltammetric analysis showed that the aziridine-modified electrode was less active for Ru(NH3)6(3+) in comparison with the pristine electrode, while no difference was observed for Fe(CN)6(4-). Electrochemical impedance spectroscopic experiments unveiled that the modified electrode was more efficient for electron transfer to the latter species than to the former.
Kim
Chang Ok
CO
Center for Integrated Molecular Systems, Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, South Korea.
Hong
Sun-Young
SY
Kim
Minju
M
Park
Su-Moon
SM
Park
Joon Won
JW
D000588:Amines / Q000737:chemistry*; D001388:Aziridines / Q000737:chemistry*; D004563:Electrochemistry; D005898:Glass / Q000737:chemistry*; D007204:Indium / Q000737:chemistry*; D013499:Surface Properties; D017971:Tin Compounds / Q000737:chemistry*
D000588:Amines; D001388:Aziridines; D017971:Tin Compounds; D007204:Indium; C033132:aziridine; C045358:stannic oxide