بدون زمان بندی
نویسندگان: Davood Taherinia
زمان بندی: بدون زمان بندی
خلاصه مقاله: Herein, the synthesis, characterization, and cyclic....
Herein, the synthesis, characterization, and cyclic voltammetry (CV) measurements are reported for ferrocene-terminated oligophenyleneimine (OPI_Fc) and ferrocene-terminated conjugation-broken oligophenyleneimine (CB-OPI_Fc) molecular wires in two different electrolytes, namely 1-ethyl-3-methylimidazolium-bis (trifluoromethyl-sulfonyl) imide (EMITFSI) ionic liquid, and tetrabutylammonium hexafluorophosphate (Bu4NPF6) in acetonitrile (0.1 M solution). Molecular wires were synthesized on Au surfaces by the sequential imine condensation reactions. CV was used to investigate the kinetics of electron transfer to the ferrocene and it was observed that the standard electron transfer rate constant (k0) is a strong function of the electrolyte nature as well as the chemical composition of the molecular wire. Interestingly, when 0.1 M Bu4NPF6 in acetonitrile was used as the electrolyte, all of the molecular wires exhibited quite similar k0 values. However, in the case of the ionic liquid, we found that k0 dramatically varies for each molecular wire and trends as OPI 6_Fc > CB3-OPI 6_Fc > CB5-OPI 6_Fc > CB3,5-OPI 6_Fc.