title: Origin of the blue shift of the CH stretching band for 2-butoxyethanol in water.
abstract: The blue shift of the isolated CD stretching band of 2-butoxyethanol (C4E1), which is observed for the aqueous solution during the dilution process, has been investigated by infrared (IR) spectroscopy and quantum chemical calculations. Mono-deuterium-labeled C4E1's were employed to remove the severe overlapping among the CH stretching bands. The isolated CD stretching mode of the alpha-methylene in the butoxy group shows a large blue shift, while those of the beta-methylene and methyl groups are not largely shifted. The spectral simulation results for the C4E1/H2O complexes indicate that the large blue shift of the CD stretching band of the butoxy group arises mainly from the hydration of the ether oxygen atom.
authors.affiliation: Graduate School of Science, Hiroshima University, 1-3-1 Kagami-yama, Higashi-Hiroshima 739-8526, Japan. katsumot@hiroshima-u.ac.jp
authors.forename: Yukiteru
authors.initials: Y
authors.lastname: Katsumoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Komatsu
authors.forename: Keiichi
authors.initials: K
authors.lastname: Ohno