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Electrochemical and Structural Properties of Self-assembled Monolayers of 2-Methyl-3-(ω-mercaptoalkyl)-1,4-naphthoquinones on Gold by Arūnas Bulovas; Nijolė Dirvianskytė; Zita Talaikytė; Gediminas Niaura; Sandra Valentukonytė; Eugenijus Butkus; Valdemaras Razumas is a Engineering article available to read on EtoBox.
What is Electrochemical and Structural Properties of Self-assembled Monolayers of 2-Methyl-3-(ω-mercaptoalkyl)-1,4-naphthoquinones on Gold about?
2-Methyl-3-(x-mercaptoalkyl)-1,4-naphthoquinones, containing 5, 7, and 9 carbon atoms in the alkyl chain, were synthesized, and the structural and electrochemical parameters of their self-assembled monolayers (SAMs) on gold were studied by in situ Fourier-transform surface-enhanced Raman spectroscopy (FT-SERS) and cyclic voltammetry (CV). We have demonstrated that the alkyl chains of SAM prepared from the concentrated (1 mM) substance solution contain a number of gauche defects. Nevertheless, it has been found that the 2-methyl-1,4-naphthoquinone (2-MeNQ) group does not interact directly with gold. In contrast, spectral changes for surface layers prepared from diluted (0.05 lM) solutions have indicated flat ring orientation and direct involvement of 2-MeNQ group in the interaction with Au. It has been found that the Au-S stretching band at 291 cm À1 considerably increases in intensity and blue-shifts by $10 cm À1 in the surface spectra of monolayers prepared from low concentration coating solution indicating different Au-S bonding geometry and coordination of sulphur atom with Au. Up-shift in the C@O band from 1654 to 1660 cm À1 has been detected for the mixed monolayer prepared us
Who reads Electrochemical and Structural Properties of Self-assembled Monolayers of 2-Methyl-3-(ω-mercaptoalkyl)-1,4-naphthoquinones on Gold?
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- Author
- Arūnas Bulovas; Nijolė Dirvianskytė; Zita Talaikytė; Gediminas Niaura; Sandra Valentukonytė; Eugenijus Butkus; Valdemaras Razumas
- Publisher
- Elsevier ; Elsevier BV (ISSN 1572-6657)
- Published
- 2006
- Language
- EN
- Field
- Engineering (Physical Sciences)