完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Fu, Lung | en_US |
dc.contributor.author | Han, Hui-Ling | en_US |
dc.contributor.author | Lee, Yuan-Pern | en_US |
dc.date.accessioned | 2014-12-08T15:29:39Z | - |
dc.date.available | 2014-12-08T15:29:39Z | - |
dc.date.issued | 2012-12-21 | en_US |
dc.identifier.issn | 0021-9606 | en_US |
dc.identifier.uri | http://dx.doi.org/10.1063/1.4770227 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/21297 | - |
dc.description.abstract | We investigated IR spectra in the CH- and SH-stretching regions of size-selected methanethiol clusters, (CH3SH)(n) with n = 2-5, in a pulsed supersonic jet using infrared (IR)-vacuum ultraviolet (VUV) ionization. VUV emission at 132.50 nm served as the source of ionization in a time-of-flight mass spectrometer. Clusters were dissociated with light from a tunable IR laser before ionization. The variations in intensity of methanethiol cluster ions (CH3SH)(n)(+) were monitored as the IR laser light was tuned across the range 2470-3100 cm(-1). In the SH-stretching region, the spectrum of (CH3SH)(2) shows a weak band near 2601 cm(-1), red-shifted only 7 cm(-1) from that of the monomer. In contrast, all spectra of (CH3SH)(n), n = 3-5, show a broad band near 2567 cm(-1) with much greater intensity. In the CH-stretching region, absorption bands of (CH3SH)(2) are located near 2865, 2890, 2944, and 3010 cm(-1), red-shifted by 3-5 cm(-1) from those of CH3SH. These red shifts increase slightly for larger clusters and bands near 2856, 2884, 2938, and 3005 cm(-1) were observed for (CH3SH)(5). These spectral results indicate that the S-H center dot center dot center dot S hydrogen bond plays an important role in clusters with n = 3-5, but not in (CH3SH)(2), in agreement with theoretical predictions. The absence of a band near 2608 cm(-1) that corresponds to absorption of the non-hydrogen-bonded SH moiety and the large width of observed feature near 2567 cm(-1) indicate that the dominant stable structures of (CH3SH)(n), n = 3-5, have a cyclic hydrogen-bonded framework. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4770227] | en_US |
dc.language.iso | en_US | en_US |
dc.subject | hydrogen bonds | en_US |
dc.subject | infrared spectra | en_US |
dc.subject | molecular clusters | en_US |
dc.subject | molecular configurations | en_US |
dc.subject | molecule-photon collisions | en_US |
dc.subject | organic compounds | en_US |
dc.subject | photoionisation | en_US |
dc.subject | red shift | en_US |
dc.subject | time of flight mass spectra | en_US |
dc.title | Infrared absorption of methanethiol clusters (CH3SH)(n), n=2-5, recorded with a time-of-flight mass spectrometer using IR depletion and VUV ionization | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1063/1.4770227 | en_US |
dc.identifier.journal | JOURNAL OF CHEMICAL PHYSICS | en_US |
dc.citation.volume | 137 | en_US |
dc.citation.issue | 23 | en_US |
dc.citation.epage | en_US | |
dc.contributor.department | 應用化學系 | zh_TW |
dc.contributor.department | 應用化學系分子科學碩博班 | zh_TW |
dc.contributor.department | Department of Applied Chemistry | en_US |
dc.contributor.department | Institute of Molecular science | en_US |
dc.identifier.wosnumber | WOS:000312780300024 | - |
dc.citation.woscount | 1 | - |
顯示於類別: | 期刊論文 |