This presentation describes the characterization of fluorinated self-assembled monolayers (FSAMs) generated from the adsorption of CF3-terminated alkanethiols on underpotentially-deposited (UPD) silver and bare gold substrates using sum frequency generation (SFG) spectroscopy and infrared reflection-absorption spectroscopy (IRRAS) in the C–F and C–H stretching regions, between 1100-1500 cm-1 and 2700-3100 cm-1, respectively. The overall structures and orientations of these FSAMs are important microscopic properties that impart a direct macroscopic effect on the wetting, adhesion, and stability of these films. The average functional group orientations in air and under various contacting liquids were calculated from the acquired SFG spectra. The spectroscopically derived orientation of the molecules offers further insight into the macroscopic wettability of FSAMs.

Sum frequency generation spectroscopy of terminally fluorinated self-assembled monolayers on UPD silver and bare gold substrates

254th National Meeting (2017)

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