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Wu X, Zhou X, Bjelić S, Hemberger P, Sztáray B, Bodi A. A plethora of isomerization processes and hydrogen scrambling in the fragmentation of the methanol dimer cation: a PEPICO study. Phys Chem Chem Phys 2022; 24:1437-1446. [PMID: 34984425 DOI: 10.1039/d1cp05155e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The valence photoionization of light and deuterated methanol dimers was studied by imaging photoelectron photoion coincidence spectroscopy in the 10.00-10.35 eV photon energy range. Methanol clusters were generated in a rich methanol beam in nitrogen after expansion into vacuum. They generally photoionize dissociatively to protonated methanol cluster cations, (CH3OH)nH+. However, the stable dimer parent ion (CH3OH)2+ is readily detected below the dissociation threshold to yield the dominant CH3OH2+ fragment ion. In addition to protonated methanol, we could also detect the water- and methyl-loss fragment ions of the methanol dimer cation for the first time. These newly revealed fragmentation channels are slow and cannot compete with protonated methanol cation formation at higher internal energies. In fact, the water- and methyl-loss fragment ions appear together and disappear at a ca. 150 meV higher energy in the breakdown diagram. Experiments with selectively deuterated methanol samples showed H scrambling involving two hydroxyl and one methyl hydrogens prior to protonated methanol formation. These insights guided the potential energy surface exploration to rationalize the dissociative photoionization mechanism. The potential energy surface was further validated by a statistical model including isotope effects to fit the experiment for the light and the perdeuterated methanol dimers simultaneously. The (CH3OH)2+ parent ion dissociates via five parallel channels at low internal energies. The loss of both CH2OH and CH3O neutral fragments leads to protonated methanol. However, the latter, direct dissociation channel is energetically forbidden at low energies. Instead, an isomerization transition state is followed by proton transfer from a methyl group, which leads to the CH3(H)OH+⋯CH2OH ion, the precursor to the CH2OH-, H2O-, and CH3-loss fragments after further isomerization steps, in part by a roaming mechanism. Water loss yields the ethanol cation, and two paths are proposed to account for m/z 49 fragment ions after CH3 loss. The roaming pathways are quickly outcompeted by hydrogen bond breaking to yield CH3OH2+, which explains the dominance of the protonated methanol fragment ion in the mass spectrum.
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Affiliation(s)
- Xiangkun Wu
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
| | - Xiaoguo Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Saša Bjelić
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
| | | | - Bálint Sztáray
- University of the Pacific, Department of Chemistry, Stockton, CA 95211, USA
| | - Andras Bodi
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
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Bodi A, Hemberger P, Tuckett RP. From Energetics to Intracluster Chemistry: Valence Photoionization of Trifluoromethylsulfur Pentafluoride (CF 3SF 5) by Double Velocity Map Imaging. J Phys Chem A 2021; 125:2601-2611. [PMID: 33729793 DOI: 10.1021/acs.jpca.1c00918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Trifluoromethylsulfur pentafluoride (CF3SF5) was valence threshold photoionized in a double imaging photoelectron photoion coincidence spectrometer using vacuum ultraviolet synchrotron radiation. In the 12.5-16.4 eV photon energy range, CF3+, SF5+, and SF3+ cations were observed in both room temperature (RT) and molecular beam (MB) experiments. Their fractional abundances exhibited differences beyond the sample temperature. Kinetic energy analysis of the fragment ions confirmed the difference in the dissociative photoionization mechanism. In the RT experiment, the CF3+ kinetic energies were extrapolated to a 11.84 ± 0.15 eV threshold, which was used in an ion cycle to determine the enthalpy of formation of CF3SF5 as ΔfH°298K(CF3SF5) = -1593 ± 16 kJ mol-1. We also updated the enthalpy of formation of the sulfur pentafluoride radical as ΔfH°298K(SF5) = -854 ± 7 kJ mol-1 and discuss the discrepancy between the CF3 ionization energy based on the Active Thermochemical Tables and the value anchored to the CF ionization energy. A computed reaction enthalpy network optimization resulted in ΔfH°298K(CF3SF5) = -1608 ± 20 kJ mol-1. Both values for ΔfH°298K(CF3SF5) agree with previous ab initio ones in contrast to the original, experimental determination. SF3+ is formed by F-transfer processes both in the RT and MB experiments. Although the same peaks were observed in both experiments, the lower SF3+ onset energy and the more slowly rising CF3+ kinetic energy release in the MB experiment revealed clustering and intracluster F-transfer reactions upon ionization. The monomer and dimer cation potential energy surfaces were explored to rationalize the observations. In the dimer cation, the observer CF3SF5 catalyzes fluorine transfer and promotes CF4 formation, which ultimately leads to the SF3+ fragment ion.
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Affiliation(s)
- Andras Bodi
- Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Patrick Hemberger
- Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Richard P Tuckett
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
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Tachikawa H. Reaction Dynamics Following Ionization of Ammonia Dimer Adsorbed on Ice Surface. J Phys Chem A 2016; 120:7301-10. [DOI: 10.1021/acs.jpca.6b04699] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroto Tachikawa
- Division
of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, JAPAN
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Signorell R, Yoder BL, West AHC, Ferreiro JJ, Saak CM. Angle-resolved valence shell photoelectron spectroscopy of neutral nanosized molecular aggregates. Chem Sci 2014. [DOI: 10.1039/c3sc53423e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Angle-resolved photoelectron spectroscopy opens a new avenue to probe the orbital character of solutes and solvents from the nanoscale to the bulk.
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Affiliation(s)
- Ruth Signorell
- ETH Zürich
- Laboratory of Physical Chemistry
- Zürich, Switzerland
| | - Bruce L. Yoder
- ETH Zürich
- Laboratory of Physical Chemistry
- Zürich, Switzerland
| | - Adam H. C. West
- ETH Zürich
- Laboratory of Physical Chemistry
- Zürich, Switzerland
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West AHC, Yoder BL, Signorell R. Size-Dependent Velocity Map Photoelectron Imaging of Nanosized Ammonia Aerosol Particles. J Phys Chem A 2013; 117:13326-35. [PMID: 23919276 DOI: 10.1021/jp406313a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Adam H. C. West
- Laboratory of Physical Chemistry, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich,
Switzerland
| | - Bruce L. Yoder
- Laboratory of Physical Chemistry, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich,
Switzerland
| | - Ruth Signorell
- Laboratory of Physical Chemistry, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich,
Switzerland
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Orabi EA, Lamoureux G. Polarizable Interaction Model for Liquid, Supercritical, and Aqueous Ammonia. J Chem Theory Comput 2013; 9:2035-51. [DOI: 10.1021/ct301123j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Esam A. Orabi
- Department of Chemistry
and Biochemistry and Centre
for Research in Molecular Modeling (CERMM), Concordia University,
7141 Sherbrooke Street West, Montréal, Québec H4B 1R6,
Canada
| | - Guillaume Lamoureux
- Department of Chemistry
and Biochemistry and Centre
for Research in Molecular Modeling (CERMM), Concordia University,
7141 Sherbrooke Street West, Montréal, Québec H4B 1R6,
Canada
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Case AS, Heid CG, Western CM, Crim FF. Determining the dissociation threshold of ammonia trimers from action spectroscopy of small clusters. J Chem Phys 2012; 136:124310. [DOI: 10.1063/1.3697480] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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8
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Matsuda Y, Hoki K, Maeda S, Hanaue KI, Ohta K, Morokuma K, Mikami N, Fujii A. Experimental and theoretical investigations of isomerization reactions of ionized acetone and its dimer. Phys Chem Chem Phys 2012; 14:712-9. [DOI: 10.1039/c1cp22953b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yu L, Yang ZZ. Study on structures and properties of ammonia clusters (NH3)n (n=1–5) and liquid ammonia in terms of ab initio method and atom-bond electronegativity equalization method ammonia-8P fluctuating charge potential model. J Chem Phys 2010; 132:174109. [DOI: 10.1063/1.3418567] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Ohta K, Matsuda Y, Mikami N, Fujii A. Intermolecular proton-transfer in acetic acid clusters induced by vacuum-ultraviolet photoionization. J Chem Phys 2009; 131:184304. [DOI: 10.1063/1.3257686] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Yamada Y, Nishino Y, Fujihara A, Ishikawa H, Fuke K. Real-Time Observation of Formation and Relaxation Dynamics of NH4 in (CH3OH)m(NH3)n Clusters. J Phys Chem A 2009; 113:2734-44. [DOI: 10.1021/jp810266a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Yuji Yamada
- Department of Chemistry, Graduate School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Yoko Nishino
- Department of Chemistry, Graduate School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Akimasa Fujihara
- Department of Chemistry, Graduate School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Haruki Ishikawa
- Department of Chemistry, Graduate School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Kiyokazu Fuke
- Department of Chemistry, Graduate School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
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Matsuda Y, Mikami N, Fujii A. Vibrational spectroscopy of size-selected neutral and cationic clusters combined with vacuum-ultraviolet one-photon ionization detection. Phys Chem Chem Phys 2009; 11:1279-90. [DOI: 10.1039/b815257h] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Hachiya M, Matsuda Y, Suhara KI, Mikami N, Fujii A. Infrared predissociation spectroscopy of cluster cations of protic molecules, (NH[sub 3])[sub n]+], n=2–4 and (CH[sub 3]OH)[sub n]+], n=2,3. J Chem Phys 2008; 129:094306. [DOI: 10.1063/1.2971186] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Matsuda Y, Mori M, Hachiya M, Fujii A, Mikami N. Infrared predissociation spectroscopy of ammonia cluster cations (NH3)n+ (n=2–4) produced by vacuum-ultraviolet photoionization. J Chem Phys 2006; 125:164320. [PMID: 17092086 DOI: 10.1063/1.2360279] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Infrared predissociation spectroscopy of vacuum ultraviolet-pumped ion (IRPDS-VUV-PI) is performed on ammonia cluster cations (NH3)n+ (n=2-4) that are produced by VUV photoionization in supersonic jets. The structures of (NH3)2+ and (NH3)4+ are determined through the observation of infrared spectra and vibrational calculations based on ab initio calculations at the MP2/6-31G** and 6-31++G** levels. (NH3)2+ is found to be of the "hydrogen-transferred" form having the (H3N+-...NH2) composition. In contrast, (NH3)4+ exhibits the "head-to-head" dimer cation (H3...NH3+ core structure, where the positive charge is shared between two ammonia molecules in the core, and two other molecules are hydrogen bonded onto the core. An unequivocal assignment of the infrared spectrum of (NH3)3+ has not been achieved, because the presence of two isomeric structures could be suggested by the observed spectrum and theoretical calculations.
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Affiliation(s)
- Yoshiyuki Matsuda
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aoba, Aoba-ku, Sendai 980-8578, Japan.
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Janeiro-Barral PE, Mella M. Study of the Structure, Energetics, and Vibrational Properties of Small Ammonia Clusters (NH3)n (n = 2−5) Using Correlated ab Initio Methods. J Phys Chem A 2006; 110:11244-51. [PMID: 17004733 DOI: 10.1021/jp063252g] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Equilibrium geometries, interaction energies, and harmonic frequencies of (NH3)n isomers (n = 2-5) have been computed using correlated calculations (MP2) in conjunction with Dunning's aug-cc-pVXZ (X = D, T, Q) basis sets and the Counterpoise procedure. Whenever available, literature values for the binding energy and geometry of dimers and trimers agree well with our data. Low lying isomers for (NH3)4 and (NH3)5 have been found to have similar binding energies (roughly 16 and 20 kcal/mol for the tetramer and pentamer, respectively), perhaps suggesting the presence of a very smooth energy landscape. Using BSSE corrected forces or freezing the monomer structure to its gas phase geometry have been found to have only a weak impact on the energetic and structural properties of the clusters. The effect of zero-point energy (ZPE) on the relative stability of the clusters has been estimated using harmonic frequencies. The latter also highlighted the presence of vibrational fingerprints for the presence of double acceptor ammonia molecules. Many-body effects for (NH3)n isomers (n = 2-4) have been investigated to explore the possibility of building a pairwise interaction model for ammonia. In the frame of the work presented, we have found the 3-body effect to account for 10-15% of the total interaction energy, whereas the 4-body effects may be neglected as first approximation.
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Affiliation(s)
- Paula E Janeiro-Barral
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT United Kingdom
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16
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Shi T, Ge J, Zhang Y, Zhu Q. Hydrogen bonds in 1,4-dioxane/ammonia binary clusters. J Chem Phys 2004; 120:8453-62. [PMID: 15267770 DOI: 10.1063/1.1689291] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
With synchrotron radiation, we have studied the photoionization and dissociation of 1,4-dioxane/ammonia clusters in a supersonic expansion. The observed major product ions are the 1,4-dioxane cation M(+) and protonated cluster ions M(NH(3))(n)H(+) (where M=1,4-dioxane), and the intensities of the unprotonated cluster ions M(NH(3))(n) (+) are much lower. Fully optimized geometries and energies of the neutral cluster M(NH(3))(2) and related cluster ions have been obtained using the ab initio molecular orbital method and density functional theory. The potential energy surface of the excited state of M(NH(3))(2) (+) was also calculated. With these results, the mechanisms of different photoionization-dissociation channels have been suggested. The most probable channel is electron ejection from the highest occupied molecular orbital, followed by the dissociation into M(+) and (NH(3))(2). For another main channel, after removing an electron from the second highest occupied molecular orbital, the intracluster proton transfer process takes place to form the stable unprotonated cluster ion M(NH(3))H(+)-NH(2), which usually leads to the dissociated protonated cluster ion M(NH(3))H(+) and a radical NH(2).
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Affiliation(s)
- Tujin Shi
- The State Key Laboratory of Molecular Reaction Dynamics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
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17
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Farmanara P, Ritze HH, Stert V, Radloff W, Hertel IV. Ultrafast photodissociation dynamics and energetics of the electronically excited H atom transfer state of the ammonia dimer and trimer. J Chem Phys 2002. [DOI: 10.1063/1.1429952] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Farmanara P, Stert V, Ritze HH, Radloff W, Hertel IV. Control of the fragmentation of excited ammonia clusters by femtosecond infrared laser pulses. J Chem Phys 2001. [DOI: 10.1063/1.1377889] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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19
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Thompson WE, Jacox ME. The infrared spectra of the NH3-dn+ cations trapped in solid neon. J Chem Phys 2001. [DOI: 10.1063/1.1349087] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dessent CE, Müller-Dethlefs K. Hydrogen-Bonding and van der Waals Complexes Studied by ZEKE and REMPI Spectroscopy. Chem Rev 2000; 100:3999-4022. [PMID: 11749337 DOI: 10.1021/cr990060r] [Citation(s) in RCA: 181] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C E Dessent
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
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21
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Affiliation(s)
- Jong Keun Park
- Department of Chemistry and Central Laboratory, Pusan National University, Pusan 609-735, Korea
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Pelc A, Michalak L. Electron ionization study of ammonia micro-clusters. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2000; 14:1455-1461. [PMID: 10931537 DOI: 10.1002/1097-0231(20000830)14:16<1455::aid-rcm47>3.0.co;2-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
An electron impact ion source on a double focusing sector field mass spectrometer was used to investigate ammonia micro-clusters produced by the adiabatic free jet expansion of ammonia gas. The appearance energies for [NH(3)](n)(+), n </= 9, ions have been determined. Results of measurements of appearance pressures of selected clusters are described for a range of operating conditions. An empirical formula describing the ammonia clusters production is proposed. Copyright 2000 John Wiley & Sons, Ltd.
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Affiliation(s)
- A Pelc
- Institute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, Poland
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Farmanara P, Radloff W, Stert V, Ritze HH, Hertel IV. Real time observation of hydrogen transfer: Femtosecond time-resolved photoelectron spectroscopy in the excited ammonia dimer. J Chem Phys 1999. [DOI: 10.1063/1.479343] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Menzel C, Baumfalk R, Zacharias H. Angular and velocity distributions of small cluster fragments in neutral (NH3) scattering off LiF(100). Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00321-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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25
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Internal conversion in highly excited benzene and benzene dimer: femtosecond time-resolved photoelectron spectroscopy. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)01142-1] [Citation(s) in RCA: 99] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Park JK, Iwata S. Ab Initio Study of Photochemical Reactions of Ammonia Dimer Systems. J Phys Chem A 1997. [DOI: 10.1021/jp964000q] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jong Keun Park
- Department of Chemistry, Pusan National University, Pusan 609-735, Korea
| | - Suehiro Iwata
- Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
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Signorell R, Palm H, Merkt F. Structure of the ammonium radical from a rotationally resolved photoelectron spectrum. J Chem Phys 1997. [DOI: 10.1063/1.473653] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Castleman AW, Bowen KH. Clusters: Structure, Energetics, and Dynamics of Intermediate States of Matter. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp961030k] [Citation(s) in RCA: 603] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. W. Castleman
- Department of Chemistry, Pennsylvania State University, 152 Davey Laboratory, University Park, Pennsylvania 16802
| | - K. H. Bowen
- Department of Chemistry, The Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218
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29
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Snyder E, Purnell J, Wei S, Buzza S, Castleman A. Real-time dynamics of ammonia clusters excited through the à state: formation of the protonated cluster ions. Chem Phys 1996. [DOI: 10.1016/0301-0104(95)00402-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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30
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Radloff W, Freudenberg T, Ritze HH, Stert V, Weyers K, Noack F. Femtosecond dynamics of benzene(NH3)n complexes in highly excited states. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)01015-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Buzza SA, Wei S, Purnell J, Castleman AW. Formation and metastable decomposition of unprotonated ammonia cluster ions upon femtosecond ionization. J Chem Phys 1995. [DOI: 10.1063/1.469531] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Posey LA, Guettler RD, Kirchner NJ, Zare RN. Influence of vibrational excitation and collision energy on the ion‐molecule reaction NH+3(ν2)+ND3. J Chem Phys 1994. [DOI: 10.1063/1.467494] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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33
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Hudgins DM, Porter RF. Studies of the hydrated oxonium radical H3O·(H2O)n and the ammoniated ammonium radical NH4·(NH3)n by neutralized ion beam techniques. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0168-1176(93)03901-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Misaizu F, Houston PL, Nishi N, Shinohara H, Kondow T, Kinoshita M. Formation of protonated ammonia cluster ions: Two‐color two‐photon ionization study. J Chem Phys 1993. [DOI: 10.1063/1.464626] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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The metastable formation of di-ethylchloronium ions from ethylchloride dimer ions in a seeded molecular beam. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01426602] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Greer JC, Ahlrichs R, Hertel IV. Proton transfer in ammonia cluster cations: molecular dynamics in a self consistent field. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01426607] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kaiser E, Vries J, Steger H, Menzel C, Kamke W, Hertel IV. Fragmentation dynamics of ammonia cluster ions after single photon ionisation. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01543971] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Buck U, Lauenstein C. Electron bombardment fragmentation of size selected NH3 clusters. J Chem Phys 1990. [DOI: 10.1063/1.457783] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
39
|
Kamke W, Vries J, Krauss J, Kaiser E, Kamke B, Hertel IV. Photoionisation studies of homogeneous argon and krypton clusters using TPEPICO. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf01429284] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
40
|
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