Folding of the hydrogen bond network of H+(CH 3OH)7 with rare gas tagging

Toru Hamashima, Ying Cheng Li, Michael C.H. Wu, Kenta Mizuse, Tomohiro Kobayashi, Asuka Fujii, Jer Lai Kuo

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


A number of isomer structures can be formed in hydrogen-bonded clusters, reflecting the essential variety of structural motifs of hydrogen bond networks. Control of isomer distribution of a cluster is important not only in practical use for isomer-specific spectroscopy but also in understanding of isomerization processes of hydrogen bond networks. Protonated methanol clusters have relatively simple networks and they are model systems suitable to investigate isomer distribution changes. In this paper, isomer distribution of H +(CH3OH)7 is studied by size-selective infrared spectroscopy in the OH and CH stretching vibrational region and density functional theory calculations. While the clusters produced by a supersonic jet expansion combined with electron ionization were predominantly isomers having open hydrogen bond networks such as a linear chain, the Ar or Ne attachment (so-called rare gas tagging) entirely switches the isomer structures to compactly folded ones, which are composed only of closed multiple rings. The origin of the isomer switching is discussed in terms of thermal effects and specific isomer preference.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalJournal of Physical Chemistry A
Issue number1
Publication statusPublished - 2013 Jan 10


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