Self-assembled monolayers (SAMs) of an electron donor TTF derivative with long alkyl chains (-C11H22-) are formed on Au (111). STM, surface plasmon resonance, and FTIR reflection absorption spectroscopy measurements suggest that TTF backbone is isolated from the gold substrate by long alkyl chains. Cyclic voltammograms reveal two redox peaks (E-1(1/2) = 263 mV E-2(1/2) = 508 mV vs. Ag/Ag+) corresponding to TTF/TTF+ and TTF+/TTF2+. These peak currents are proportional to the scan rates, indicating that the TTF backbone maintains its electrochemical activity in the SAW In addition, the peak-to-peak separations between oxidation and reduction are roughly proportional to the scan rates, which indicates that a potential drop takes place at the long alkyl chains, which work as resistance in the electron transport.