<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kobayashi, Tomohiro</style></author><author><style face="normal" font="default" size="100%">Shishido, Ryunosuke</style></author><author><style face="normal" font="default" size="100%">Mizuse, Kenta</style></author><author><style face="normal" font="default" size="100%">Fujii, Asuka</style></author><author><style face="normal" font="default" size="100%">Jer-Lai Kuo</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Structures of hydrogen bond networks formed by a few tens of methanol molecules in the gas phase: size-selective infrared spectroscopy of neutral and protonated methanol clusters</style></title><secondary-title><style face="normal" font="default" size="100%">Phys. Chem. Chem. Phys.</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1039/C3CP50985K</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">The Royal Society of Chemistry</style></publisher><volume><style face="normal" font="default" size="100%">15</style></volume><pages><style face="normal" font="default" size="100%">9523-9530</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;In this work{,} we report infrared spectra of large neutral and protonated methanol clusters{,} (MeOH)n and H+(MeOH)n{,} in the CH and OH stretching vibrational region in the size range of n = 10-50. The infrared-ultraviolet double resonance scheme combined with mass spectrometry was employed to achieve moderate size selection of the neutral clusters with the addition of a phenol molecule as a chromophore. Infrared dissociation spectroscopy was performed on the protonated methanol clusters by using a tandem quadrupole mass spectrometer to enable the precise size selection of the clusters. While the neutral clusters showed essentially the same spectra in all the observed size range{,} the protonated clusters showed remarkable narrowing of the H-bonded OH stretch band with increasing n. In n [greater-than-or-equal] [similar]30{,} the spectra of the neutral and protonated clusters become almost identical. These spectral features demonstrate that hydrogen bond networks of methanol prefer simple cyclic structures (or {&quot;}bicyclic{&quot;} structures in protonated methanol) and branching of the hydrogen bond networks (side-chain formation) is almost negligible. Implications of the spectra of the clusters are also discussed by comparison with spectra of bulk phases.&lt;/p&gt;
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