TY - JOUR
T1 - Spectral signatures of four-coordinated sites in water clusters
T2 - Infrared spectroscopy of phenol-(H2O)n (∼20 ≤ n ≤ ∼50)
AU - Hamashima, Toru
AU - Mizuse, Kenta
AU - Fujii, Asuka
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/2/10
Y1 - 2011/2/10
N2 - We report infrared spectra of phenol-(H2O)n (∼20 ≤ n ≤ ∼50) in the OH stretching vibrational region. Phenol-(H 2O)n forms essentially the same hydrogen bond (H-bond) network as that of the neat water cluster, (H2O)n+1. The phenyl group enables us to apply the scheme of infrared-ultraviolet double resonance spectroscopy combined with mass spectrometry, achieving the moderate size selectivity (0 ≤ Δn ≤ ∼6). The observed spectra show clear decrease of the free OH stretch band intensity relative to that of the H-bonded OH band with increasing cluster size n. This indicates increase of the relative weight of four-coordinated water sites, which have no free OH. Corresponding to the suppression of the free OH band, the absorption peak of the H-bonded OH stretch band rises at ∼3350 cm-1. This spectral change is interpreted in terms of a signature of four-coordinated water sites in the clusters.
AB - We report infrared spectra of phenol-(H2O)n (∼20 ≤ n ≤ ∼50) in the OH stretching vibrational region. Phenol-(H 2O)n forms essentially the same hydrogen bond (H-bond) network as that of the neat water cluster, (H2O)n+1. The phenyl group enables us to apply the scheme of infrared-ultraviolet double resonance spectroscopy combined with mass spectrometry, achieving the moderate size selectivity (0 ≤ Δn ≤ ∼6). The observed spectra show clear decrease of the free OH stretch band intensity relative to that of the H-bonded OH band with increasing cluster size n. This indicates increase of the relative weight of four-coordinated water sites, which have no free OH. Corresponding to the suppression of the free OH band, the absorption peak of the H-bonded OH stretch band rises at ∼3350 cm-1. This spectral change is interpreted in terms of a signature of four-coordinated water sites in the clusters.
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U2 - 10.1021/jp111586p
DO - 10.1021/jp111586p
M3 - Article
C2 - 21182288
AN - SCOPUS:79851487494
VL - 115
SP - 620
EP - 625
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
SN - 1089-5639
IS - 5
ER -