Abstract
We studied the vibrational Sum-Frequency (SF) spectra of long chain fatty alcohols and amines physisorbed at liquid/air interfaces and of OctadecylTrichlorSilan (OTS) chemisorbed on glass/air interfaces in situ, i. e., in normal laboratory environment. The intense, band-width-limited IR pulses generated by our laser system are tunable from 2600 to 4000 cm−1 with a constant pulse duration of 3 ps and a band width of 5 cm−1 (FWHM) over the entire tuning range, thus covering the CH-, NH-, and OH-stretching regions.
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