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• W2011820145 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···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." @default.
• W2011820145 created "2016-06-24" @default.
• W2011820145 creator A5015444281 @default.
• W2011820145 creator A5018957687 @default.
• W2011820145 creator A5074788611 @default.
• W2011820145 date "2012-12-19" @default.
• W2011820145 modified "2023-10-17" @default.
• W2011820145 title "Infrared absorption of methanethiol clusters (CH3SH)<i>n</i>, <i>n</i> = 2–5, recorded with a time-of-flight mass spectrometer using IR depletion and VUV ionization" @default.
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• W2011820145 doi "https://doi.org/10.1063/1.4770227" @default.
• W2011820145 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23267486" @default.
• W2011820145 hasPublicationYear "2012" @default.
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