Abstract
Stimulated Raman scattering of ethanol-water binary solutions is investigated when an intense pulsed beam is focused on sample solutions. Two new enhanced peaks of water at about 3300 and 3375 cm−1 are obtained in dilute ethanol solutions (Volume Ratio of ethanol: VE from 0 to 0.1), indicating the formation of strong hydrogen bonds, which results from the cooperation of the hydroxyl-enhanced hydrogen bonds and the ice-like structure around the ethyl groups. However, when VE increases to 0.2, the main peak of water is very weak and a new peak appears at 3500 cm−1, indicating the destroy of hydrogen bonds network structure, which is attributed to the self-association in ethanol aggregates.
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