Hydrogen Bond Dynamics in Alcohol Clusters

Suhm, Martin A.

doi:10.1002/9780470475935.ch1

Cited by 45 publications

(56 citation statements)

References 285 publications

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“…34,35 Finally we discuss the nature of the excitation process that is occurring in these mixed 16 The protonated cluster appearance energies agree well with those measured earlier 2 but the photoionization efficiency curve follows the shape of the argon cluster absorption spectrum quite dramatically. This is reflected in the enhancement of signal around 11.5 eV, peaking at 11.92 eV, dropping down and then rising again.…”

supporting

confidence: 73%

Ionization of Water Clusters Mediated by Exciton Energy Transfer from Argon Clusters

Golan

Ahmed

2012

J. Phys. Chem. Lett.

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The exciton energy deposited in an argon cluster (Ar n , ⟨n = 20⟩) using VUV radiation is transferred to softly ionize doped water clusters ((H2O) n , n = 1–9), leading to the formation of nonfragmented clusters. Following the initial excitation, electronic energy is channeled to ionize the doped water cluster while evaporating the Ar shell, allowing identification of fragmented and complete water cluster ions. Examination of the photoionization efficiency curve shows that cluster evaporation from excitons located above 12.6 eV is not enough to cool the energized water cluster ion and leads to their dissociation to (H2O) n−2H+ (protonated) clusters.

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supporting

confidence: 73%

Ionization of Water Clusters Mediated by Exciton Energy Transfer from Argon Clusters

Golan

Ahmed

2012

J. Phys. Chem. Lett.

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Section: In This Wavelength Regionmentioning

confidence: 87%

“…Because (CH 3 SH) 5 + is the largest cluster ion that we observed in the time-of-flight spectrum under the experimental condition B (Fig. 4), we expect that the negative of the recorded action spectrum of (CH 3 SH) 5 + represents the IR absorption spectrum of (CH 3 SH) 5 . The contribution from the absorption of (CH 3 SH) 5 to the action spectrum of (CH 3 SH) 4 + is expected to be small because the signal of (CH 3 SH) 5 + is only one quarter that of (CH 3 SH) 4 + , especially as (CH 3 SH) 5 likely decomposes to form (CH 3 SH) n , n ≤ 3 upon IR irradiation.…”

Section: In This Wavelength Regionmentioning

confidence: 87%

“…Under the experimental condition B, the dissociation of only (CH 3 SH) 4 and (CH 3 SH) 5 can contribute to the formation of (CH 3 SH) 3 . When we assumed an extreme case such that, upon irradiation with the IR light, all (CH 3 SH) 4 and (CH 3 SH) 5 that dissociate form (CH 3 SH) 3 , and took into account this contribution by assuming the absorption spectra of (CH 3 SH) 4 and (CH 3 SH) 5 to be the negative of the action spectra of the corresponding cluster ions, we obtained the absorption spectrum of (CH 3 SH) 3 , shown as the black trace in Fig. 7(a).…”

Section: In This Wavelength Regionmentioning

confidence: 99%

“…Vibrational spectra provide an important means to analyze the structures of hydrogen-bonded clusters and their intermolecular interactions. [1][2][3] Methanol clusters, (CH 3 OH) n , have been much investigated 4,5 through their infrared (IR) spectra. [6][7][8][9][10][11][12][13] The published experimental results indicate that (CH 3 OH) 2 has an open-chain structure, whereas cyclic hydrogen-bonded structures dominate in larger clusters of CH 3 OH.…”

Section: Introductionmentioning

confidence: 99%

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Infrared absorption of methanethiol clusters (CH3SH)n, n = 2–5, recorded with a time-of-flight mass spectrometer using IR depletion and VUV ionization

Han

Lee

2012

The Journal of Chemical Physics

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We investigated IR spectra in the CH- and SH-stretching regions of size-selected methanethiol clusters, (CH(3)SH)(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 (CH(3)SH)(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 (CH(3)SH)(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 (CH(3)SH)(n), n = 3-5, show a broad band near 2567 cm(-1) with much greater intensity. In the CH-stretching region, absorption bands of (CH(3)SH)(2) are located near 2865, 2890, 2944, and 3010 cm(-1), red-shifted by 3-5 cm(-1) from those of CH(3)SH. These red shifts increase slightly for larger clusters and bands near 2856, 2884, 2938, and 3005 cm(-1) were observed for (CH(3)SH)(5). These spectral results indicate that the S-H[middle dot][middle dot][middle dot]S hydrogen bond plays an important role in clusters with n = 3-5, but not in (CH(3)SH)(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 (CH(3)SH)(n), n = 3-5, have a cyclic hydrogen-bonded framework.

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Chiralitätserkennung bei Menthol und Neomenthol: bevorzugte Bildung homokonfigurierter Aggregate

2010

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Hydrogen Bond Dynamics in Alcohol Clusters

Cited by 45 publications

References 285 publications

Ionization of Water Clusters Mediated by Exciton Energy Transfer from Argon Clusters

Ionization of Water Clusters Mediated by Exciton Energy Transfer from Argon Clusters

Infrared absorption of methanethiol clusters (CH3SH)n, n = 2–5, recorded with a time-of-flight mass spectrometer using IR depletion and VUV ionization

Chiralitätserkennung bei Menthol und Neomenthol: bevorzugte Bildung homokonfigurierter Aggregate

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