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Sliter R, Hyeon-Deuk K, Vilesov AF. Phase Separation in Cold Para-H_{2} D_{2} Clusters. PHYSICAL REVIEW LETTERS 2024; 132:206001. [PMID: 38829090 DOI: 10.1103/physrevlett.132.206001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 04/11/2024] [Indexed: 06/05/2024]
Abstract
Low temperature phase separation in mixtures of ^{3}He and ^{4}He isotopes is a unique property of quantum fluids. Hydrogen has long been considered as another potential quantum liquid and has been predicted to be superfluid at T≤1 K, well below freezing temperature of ≈14 K. Phase separation has also been predicted in mixtures of para-H_{2} and D_{2} at temperatures ≤3 K. To defer the freezing, we produced clusters containing para-H_{2} and D_{2} at an estimated temperature of ≈2 K whose state was studied by vibrational Raman spectroscopy. The results indicate that the clusters are liquid and show the phase separation of the isotopes. The phase separation is further corroborated by the quantum molecular dynamics simulation.
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Affiliation(s)
- Russell Sliter
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Kim Hyeon-Deuk
- Department of Chemistry, Kyoto University, Kyoto 606-8502, Japan
| | - Andrey F Vilesov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
- Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, USA
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2
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Miyamoto Y, Hara H, Masuda T, Sasao N, Uetake S, Yoshimi A, Yoshimura K, Yoshimura M. Vibrational Two-Photon Emission from Coherently Excited Solid Parahydrogen. J Phys Chem A 2017; 121:3943-3951. [PMID: 28459577 DOI: 10.1021/acs.jpca.7b02011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the observation of two-photon emission from a coherently excited vibrational state of solid parahydrogen, which is also a known quantum solid. Coherence between the ground and the excited states is prepared by stimulated Raman scattering using two visible laser pulses. The two-photon emission is triggered by another mid-infrared laser pulse. It was observed that the two-photon emission persists even when the trigger pulse is injected long after the excitation. This is due to the long decoherence time of the vibrational states of solid parahydrogen. It is found that the emission intensity increases even after the excitation pulses pass through the target completely. This coherence development is highly suppressed at high target temperatures and high residual orthohydrogen concentrations. Effects of target annealing and laser-induced damage on the target are also observed.
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Affiliation(s)
- Yuki Miyamoto
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
| | - Hideaki Hara
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
| | - Takahiko Masuda
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
| | - Noboru Sasao
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
| | - Satoshi Uetake
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
| | - Akihiro Yoshimi
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
| | - Koji Yoshimura
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
| | - Motohiko Yoshimura
- Research Institute for Interdisciplinary Science, Okayama University , Okayama 700-8530, Japan
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Hoshina H, Sliter R, Ravi A, Kuma S, Momose T, Vilesov AF. Ro‐vibrational Spectra of (
para
‐H
2
)
N
‐CH
4
in He Droplets. Chemphyschem 2016; 17:3818-3825. [DOI: 10.1002/cphc.201600484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Hiromichi Hoshina
- Department of Chemistry University of Southern California Los Angeles CA 90089 USA
- Terahertz Sensing and Imaging Laboratory RIKEN 519-1399 Aramaki-Aoba, Aoba-ku Sendai, Miyagi 980-0845 Japan
| | - Russell Sliter
- Department of Chemistry University of Southern California Los Angeles CA 90089 USA
- KLA-Tencor 1 Technology Drive Milpitas CA 95035 USA
| | - Aakash Ravi
- Department of Chemistry The University of British Columbia Vancouver BC V6T 1Z1 Canada
- Department of Physics Harvard University 17 Oxford Street Cambridge MA 02138 USA
| | - Susumu Kuma
- Department of Chemistry The University of British Columbia Vancouver BC V6T 1Z1 Canada
- Atomic, Molecular & Optical Physics Laboratory RIKEN 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Takamasa Momose
- Department of Chemistry The University of British Columbia Vancouver BC V6T 1Z1 Canada
| | - Andrey F. Vilesov
- Department of Chemistry University of Southern California Los Angeles CA 90089 USA
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Hoshina H, Slipchenko M, Prozument K, Verma D, Schmidt MW, Ivanic J, Vilesov AF. Infrared Spectroscopy and Structure of (NO)n Clusters. J Phys Chem A 2016; 120:527-34. [DOI: 10.1021/acs.jpca.5b10228] [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)
- Hiromichi Hoshina
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Mikhail Slipchenko
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Kirill Prozument
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Deepak Verma
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Michael W. Schmidt
- Department
of Chemistry and Ames Laboratory (US-DOE), Iowa State University, Ames, Iowa 50011, United States
| | - Joseph Ivanic
- Advanced
Biomedical Computing Center, DSITP, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Andrey F. Vilesov
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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Sliter R, Gish M, Vilesov AF. Fast Nuclear Spin Conversion in Water Clusters and Ices: A Matrix Isolation Study. J Phys Chem A 2011; 115:9682-8. [DOI: 10.1021/jp201125k] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Russell Sliter
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Melissa Gish
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Andrey F. Vilesov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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Perera M, Tom BA, Miyamoto Y, Porambo MW, Moore LE, Evans WR, Momose T, McCall BJ. Refractive index measurements of solid parahydrogen. OPTICS LETTERS 2011; 36:840-842. [PMID: 21403702 DOI: 10.1364/ol.36.000840] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Solid para-H2 is a promising gain medium for stimulated Raman scattering, due to its high number density and narrow Raman linewidth. In preparation for the design of a cw solid hydrogen Raman laser, we have made the first measurements, to our knowledge, of the index of refraction of a solid para-H2 crystal, in the wavelength range of 430-1100 nm. For a crystal stabilized at 4.4 K, this refractive index is measured to be n(p-H2)=1.130±0.001 at 514 nm. A slight, but significant, dependence on the final crystal-growth temperature is observed, with higher n(p-H2) at higher crystal-growth temperatures. Once a crystal is grown, it can be heated up to 10 K with no change in n(p-H2). The refractive index varies only slightly over the observed wavelength range, and no significant birefringence was observed.
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Affiliation(s)
- Manori Perera
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
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Hoshina H, Skvortsov D, Sartakov BG, Vilesov AF. Rotation of methane and silane molecules in He droplets. J Chem Phys 2010; 132:074302. [DOI: 10.1063/1.3313925] [Citation(s) in RCA: 24] [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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Sliter R, Vilesov AF. Temperature dependence of the Raman spectra of liquid parahydrogen. J Chem Phys 2009; 131:074502. [DOI: 10.1063/1.3194295] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Polfer NC, Oomens J. Vibrational spectroscopy of bare and solvated ionic complexes of biological relevance. MASS SPECTROMETRY REVIEWS 2009; 28:468-494. [PMID: 19241457 DOI: 10.1002/mas.20215] [Citation(s) in RCA: 261] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The low density of ions in mass spectrometers generally precludes direct infrared (IR) absorption measurements. The IR spectrum of an ion can nonetheless be obtained by inducing photodissociation of the ion using a high-intensity tunable laser. The emergence of free electron lasers (FELs) and recent breakthroughs in bench-top lasers based on nonlinear optics have now made it possible to routinely record IR spectra of gas-phase ions. As the energy of one IR photon is insufficient to cause dissociation of molecules and strongly bound complexes, two main experimental strategies have been developed to effect photodissociation. In infrared multiple-photon dissociation (IR-MPD) many photons are absorbed resonantly and their energy is stored in the bath of vibrational modes, leading to dissociation. In the "messenger" technique a weakly bound van der Waals atom is detached upon absorption of a single photon. Fundamental, historical, and practical aspects of these methods will be presented. Both of these approaches make use of very different methods of ion preparation and manipulation. While in IR-MPD ions are irradiated in trapping mass spectrometers, the "messenger" technique is generally carried out in molecular beam instruments. The main focus of this review is the application of IR spectroscopy to biologically relevant molecular systems (amino acids, peptides, proteins). Particular issues that will be addressed here include gas-phase zwitterions, the (chemical) structures of peptides and their collision-induced dissociation (CID) products, IR spectra of gas-phase proteins, and the chelation of metal-ligand complexes. Another growing area of research is IR spectroscopy on solvated clusters, which offer a bridge between the gas-phase and solution environments. The development of state-of-the-art computational approaches has gone hand-in-hand with advances in experimental techniques. The main advantage of gas-phase cluster research, as opposed to condensed-phase experiments, is that the systems of interest can be understood in detail and structural effects can be studied in isolation. It will be shown that IR spectroscopy of mass-selected (bio)molecular systems is now well-placed to address specific questions on the individual effect of charge carriers (protons and metal ions), as well as solvent molecules on the overall structure.
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Affiliation(s)
- Nick C Polfer
- Chemistry Department, University of Florida, Gainesville, Florida 32611, USA.
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10
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Kettwich SC, Raston PL, Anderson DT. The Cl + H2 → HCl + H Reaction Induced by IR + UV Irradiation of Cl2 in Solid para-H2: Experiment. J Phys Chem A 2009; 113:7621-9. [DOI: 10.1021/jp811206a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sharon C. Kettwich
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, and Institut für Experimentalphysik, Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, D-14195, Berlin, Germany
| | - Paul L. Raston
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, and Institut für Experimentalphysik, Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, D-14195, Berlin, Germany
| | - David T. Anderson
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, and Institut für Experimentalphysik, Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, D-14195, Berlin, Germany
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Asmis KR, Sauer J. Mass-selective vibrational spectroscopy of vanadium oxide cluster ions. MASS SPECTROMETRY REVIEWS 2007; 26:542-62. [PMID: 17523146 DOI: 10.1002/mas.20136] [Citation(s) in RCA: 147] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A corner stone in the study of the size-dependent properties of cluster ions in the gas phase is their structural characterization. Over the last 10 years, significant progress has been in this research field because of significant advances in the gas phase vibrational spectroscopy of mass-selected ions. Using a combination of modern experimental and quantum chemical approaches, it is now in most cases possible to uniquely identify the geometric structure of cluster ions, based on the comparison of the experimental and simulated infrared spectra. In this article, we highlight the progress made in this research area by reviewing recent infrared photodissociation (IR-PD) experiments on small and medium sized (up to 30 atoms) vanadium oxide ions.
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Affiliation(s)
- Knut R Asmis
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany.
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Asmis KR, Fielicke A, von Helden G, Meijer G. Chapter 8 Vibrational spectroscopy of gas-phase clusters and complexes. ATOMIC CLUSTERS: FROM GAS PHASE TO DEPOSITED 2007. [DOI: 10.1016/s1571-0785(07)12008-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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13
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Hoshina H, Lucrezi J, Slipchenko MN, Kuyanov KE, Vilesov AF. Satellite band in the rovibrational spectrum of CO2 in helium droplets. PHYSICAL REVIEW LETTERS 2005; 94:195301. [PMID: 16090182 DOI: 10.1103/physrevlett.94.195301] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2004] [Indexed: 05/03/2023]
Abstract
Pulsed infrared (nu approximately 2350 cm(-1)) laser excitation spectra of CO2 molecules embedded in helium droplets are reported. The spectra exhibit a sharp R(0) rovibrational line accompanied by a weak broader (deltanu approximately 10 cm(-1)) satellite band, which is shifted by 14 cm(-1) towards higher frequencies. We assign this satellite band to a simultaneous rovibrational excitation of a molecule and its helium solvation shell. The results are rationalized within a model, which includes coupling of the rotational states of a molecule and a ring of He atoms.
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Affiliation(s)
- Hiromichi Hoshina
- Department of Chemistry, University of Southern California, Los Angeles, 90089, USA
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