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• W2062951243 abstract "A series of thiol-functionalized hydroquinone derivatives with different alkyl chain lengths, 2-(n-mercaptoalkyl)hydroquinone (abbreviated as H2Q(CH2)nSH, where n = 0, 1, 4, 6, 8, 10, and 12), has been synthesized and used for preparation of self-assembled monolayers (SAMs) on gold electrodes. The compounds spontaneously adsorb onto a gold surface to form stable and reproducible monolayers. The voltammetric behavior of the hydroquinone (H2Q) SAMs has been investigated by cyclic voltammetry to study the effect of alkyl chain length on the electrochemical characteristics for H2Q-SAMs. The H2Q-SAMs show well-developed voltammetric responses in aqueous solution and pH dependence with a slope of 58.5 mV/pH of surface formal potential in the broad pH range from 1.3 to 12.1 corresponding to the two-electron two-proton redox reaction of a H2Q subunit. The redox response of SAMs at the same time scale was transformed from reversibility to irreversibility as the alkyl chain length became larger. The monolayers obtained from a 0.1 μM or lower thiol concentration solution show the most ideal current−potential features. From the dependence of logarithmic apparent electron-transfer rate constant on the alkyl chain length between the hydroquinone and the electrode, kinetic parameters and electron tunneling constants (β) were evaluated for H2Q(CH2)nSH SAMs. The obtained experimental value of β = (1.04 ± 0.06)/CH2 unit is in good agreement with the values reported for reversible redox centers in solutions or tethered monolayer systems." @default.
• W2062951243 created "2016-06-24" @default.
• W2062951243 creator A5028810948 @default.
• W2062951243 creator A5070844596 @default.
• W2062951243 date "2001-03-24" @default.
• W2062951243 modified "2023-09-27" @default.
• W2062951243 title "Electrochemical Characteristics of Hydroquinone-Terminated Self-Assembled Monolayers on Gold" @default.
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• W2062951243 doi "https://doi.org/10.1021/la001466y" @default.
• W2062951243 hasPublicationYear "2001" @default.
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