Paulo Tde F1, de Sousa TP, de Abreu DS, Felício NH, Bernhardt PV, Lopes LG, Sousa EH, Diógenes IC.
J Phys Chem B. 2013 Jul 25;117(29):8673-80. doi: 10.1021/jp400694k. Epub 2013 Jul 16.Quartz crystal microbalance (QCM), surface plasmon resonance (SPR), and electrochemistry techniques were used to study the electron-transfer (ET) reaction of cytochrome c (Cyt c) on gold surfaces modified with thionicotinamide, thioisonicotinamide, 4-mercaptopyridine, 5-(4-pyridyl)-1,3,4-oxadiazole-2-thiol, 5-phenyl-1,3,4-oxadiazole-2-thiol, 4,4'-bipyridine, and 4,4'-dithiopyridine. The electrochemical results showed that the ET process is complex, being chiefly diffusional with steps depending on the orientation of the pyridine or phenyl tail group of the modifiers. Read More