Abstract
The in situ infrared external reflection spectra of a monolayer film of n-octadecanethiol at gold in aqueous and various nonaqueous solvents are reported. Differences in the peak positions and widths of bands in the C-H stretching region relative to an ex situ (dry N{sub 2} atmosphere) spectrum provide preliminary insights into the interactions between solvent and monolayer. Changes in the width and positions of the CH{sub 3} stretches, which qualitatively correlate with the polarizability of the solvent, suggest a slight increase in conformational disorder near the chain terminus.
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