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Changala PB, Genossar-Dan N, Brudner E, Gur T, Baraban JH, McCarthy MC. Structural and electronic trends of optical cycling centers in polyatomic molecules revealed by microwave spectroscopy of MgCCH, CaCCH, and SrCCH. Proc Natl Acad Sci U S A 2023; 120:e2303586120. [PMID: 37399375 PMCID: PMC10334755 DOI: 10.1073/pnas.2303586120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/23/2023] [Indexed: 07/05/2023] Open
Abstract
The unique optical cycling efficiency of alkaline earth metal-ligand molecules has enabled significant advances in polyatomic laser cooling and trapping. Rotational spectroscopy is an ideal tool for probing the molecular properties that underpin optical cycling, thereby elucidating the design principles for expanding the chemical diversity and scope of these platforms for quantum science. We present a comprehensive study of the structure and electronic properties in alkaline earth metal acetylides with high-resolution microwave spectra of 17 isotopologues of MgCCH, CaCCH, and SrCCH in their 2Σ+ ground electronic states. The precise semiexperimental equilibrium geometry of each species has been derived by correcting the measured rotational constants for electronic and zero-point vibrational contributions calculated with high-level quantum chemistry methods. The well-resolved hyperfine structure associated with the 1,2H, 13C, and metal nuclear spins provides further information on the distribution and hybridization of the metal-centered, optically active unpaired electron. Together, these measurements allow us to correlate trends in chemical bonding and structure with the electronic properties that promote efficient optical cycling essential to next-generation experiments in precision measurement and quantum control of complex polyatomic molecules.
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Affiliation(s)
- P. Bryan Changala
- Atomic and Molecular Physics Division, Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA02138
| | - Nadav Genossar-Dan
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva8410501, Israel
| | - Ella Brudner
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva8410501, Israel
| | - Tomer Gur
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva8410501, Israel
| | - Joshua H. Baraban
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva8410501, Israel
| | - Michael C. McCarthy
- Atomic and Molecular Physics Division, Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA02138
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Yu P, Hutzler NR. Probing Fundamental Symmetries of Deformed Nuclei in Symmetric Top Molecules. PHYSICAL REVIEW LETTERS 2021; 126:023003. [PMID: 33512225 DOI: 10.1103/physrevlett.126.023003] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
Precision measurements of Schiff moments in heavy, deformed nuclei are sensitive probes of beyond standard model T, P violation in the hadronic sector. While the most stringent limits on Schiff moments to date are set with diamagnetic atoms, polar polyatomic molecules can offer higher sensitivities with unique experimental advantages. In particular, symmetric top molecular ions possess K doublets of opposite parity with especially small splittings, leading to full polarization at low fields, internal comagnetometer states useful for rejection of systematic effects, and the ability to perform sensitive searches for T, P violation using a small number of trapped ions containing heavy exotic nuclei. We consider the symmetric top cation ^{225}RaOCH_{3}^{+} as a prototypical and candidate platform for performing sensitive nuclear Schiff measurements and characterize in detail its internal structure using relativistic ab initio methods. The combination of enhancements from a deformed nucleus, large polarizability, and unique molecular structure make this molecule a promising platform to search for fundamental symmetry violation even with a single trapped ion.
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Affiliation(s)
- Phelan Yu
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - Nicholas R Hutzler
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
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Demaison J, Craig NC, Gurusinghe R, Tubergen MJ, Rudolph HD, Coudert LH, Szalay PG, Császár AG. Fourier Transform Microwave Spectrum of Propene-3-d 1 (CH 2═CHCH 2D), Quadrupole Coupling Constants of Deuterium, and a Semiexperimental Equilibrium Structure of Propene. J Phys Chem A 2017; 121:3155-3166. [PMID: 28368600 DOI: 10.1021/acs.jpca.7b01470] [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
The ground-state rotational spectrum of propene-3-d1, CH2═CHCH2D, was measured by Fourier transform microwave spectroscopy. Transitions were assigned for the two conformers, one with the D atom in the symmetry plane (S) and the other with the D atom out of the plane (A). The energy difference between the two conformers was calculated to be 6.5 cm-1, the S conformer having lower energy. The quadrupole hyperfine structure due to deuterium was resolved and analyzed for both conformers. The experimental quadrupole coupling and the centrifugal distortion constants compared favorably to their ab initio counterparts. Ground-state rotational constants for the S conformer are 40582.157(9), 9067.024(1), and 7766.0165(12) MHz. Ground-state rotational constants for the A conformer are 43403.75(3), 8658.961(2), and 7718.247(2) MHz. For the A conformer, a small tunneling splitting (19 MHz) due to internal rotation was observed and analyzed. Using the new rotational constants of this work as well as those previously determined for the 13C species and for some deuterium-substituted species from the literature, a new semiexperimental equilibrium structure was determined and its high accuracy was confirmed. The difficulty in obtaining accurate coordinates for the out-of-plane hydrogen atom is discussed.
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Affiliation(s)
- Jean Demaison
- Section of Chemical Information Systems, University of Ulm , Albert Einstein Allee 47, 89069 Ulm, Germany
| | - Norman C Craig
- Department of Chemistry and Biochemistry, Oberlin College , Oberlin, Ohio 44074, United States
| | - Ranil Gurusinghe
- Department of Chemistry, Kent State University , Kent, Ohio 44242, United States
| | - Michael J Tubergen
- Department of Chemistry, Kent State University , Kent, Ohio 44242, United States
| | - Heinz Dieter Rudolph
- Section of Chemical Information Systems, University of Ulm , Albert Einstein Allee 47, 89069 Ulm, Germany
| | - Laurent H Coudert
- Institut des Sciences Moléculaires d'Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud , 91405 Orsay, France
| | - Péter G Szalay
- Institute of Chemistry, Eötvös Loránd University , Budapest H-1053, Hungary
| | - Attila G Császár
- MTA-ELTE Complex Chemical Systems Research Group , Pázmány Péter sétány 1/A, Budapest H-1117, Hungary
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Falconer WE. Electric Deflection and Molecular Structure: Determination of Polarities of Binary Fluorides and Oxyfluorides. Isr J Chem 2013. [DOI: 10.1002/ijch.197800005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Auzinsh M, Dashevskaya EI, Litvin I, Nikitin EE, Troe J. Quantum effects in the capture of charged particles by dipolar polarizable symmetric top molecules. II. Interplay between electrostatic and gyroscopic interactions. J Chem Phys 2013; 139:144315. [DOI: 10.1063/1.4821589] [Citation(s) in RCA: 8] [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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Auzinsh M, Dashevskaya EI, Nikitin EE, Troe J. Quantum capture of charged particles by rapidly rotating symmetric top molecules with small dipole moments: analytical comparison of the fly-wheel and adiabatic channel limits. Mol Phys 2013. [DOI: 10.1080/00268976.2013.780101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- M. Auzinsh
- Department of Physics, University of Latvia , Riga, Latvia
| | - E. I. Dashevskaya
- Schulich Faculty of Chemistry, Technion – Israel Institute of Technology , Haifa, Israel
- Max-Planck-Institut für Biophysikalische Chemie , Göttingen, Germany
| | - E. E. Nikitin
- Schulich Faculty of Chemistry, Technion – Israel Institute of Technology , Haifa, Israel
- Max-Planck-Institut für Biophysikalische Chemie , Göttingen, Germany
| | - J. Troe
- Max-Planck-Institut für Biophysikalische Chemie , Göttingen, Germany
- Institut für Physikalische Chemie, Universität Göttingen , Göttingen, Germany
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Auzinsh M, Dashevskaya EI, Litvin I, Nikitin EE, Troe J. Quantum effects in the capture of charged particles by dipolar polarizable symmetric top molecules. I. General axially nonadiabatic channel treatment. J Chem Phys 2013; 139:084311. [DOI: 10.1063/1.4819062] [Citation(s) in RCA: 10] [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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Wei Q, Kais S, Friedrich B, Herschbach D. Entanglement of polar symmetric top molecules as candidate qubits. J Chem Phys 2011; 135:154102. [DOI: 10.1063/1.3649949] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Qi Wei
- Department of Physics, Texas A & M University, College Station, Texas 77843, USA
| | - Sabre Kais
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | - Bretislav Friedrich
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Dudley Herschbach
- Department of Physics, Texas A & M University, College Station, Texas 77843, USA
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Wei Q, Kais S, Friedrich B, Herschbach D. Entanglement of polar molecules in pendular states. J Chem Phys 2011; 134:124107. [PMID: 21456645 DOI: 10.1063/1.3567486] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Qi Wei
- Department of Physics, Texas A & M University, College Station, Texas 77843, USA
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Tudorie M, Coudert LH, Huet TR, Jegouso D, Sedes G. Magnetic hyperfine coupling of a methyl group undergoing internal rotation: A case study of methyl formate. J Chem Phys 2011; 134:074314. [DOI: 10.1063/1.3554419] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [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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Hollenstein H, Marquardt RR, Quack M, Suhm MA. Dipole Moment Function of Methane and Analytical Anharmonic, 9-dimensional Potential Surface: Theory and Experiment for the Permanent Electric Dipole Moment of CH2D2Using Quantum Monte Carlo Calculations and FIR Spectroscopy. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19950990307] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Albert S, Bauerecker S, Boudon V, Brown L, Champion JP, Loëte M, Nikitin A, Quack M. Global analysis of the high resolution infrared spectrum of methane 12CH4 in the region from 0 to 4800cm−1. Chem Phys 2009. [DOI: 10.1016/j.chemphys.2008.10.019] [Citation(s) in RCA: 148] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Miyamoto Y, Fushitani M, Ando D, Momose T. Nuclear spin conversion of methane in solid parahydrogen. J Chem Phys 2008; 128:114502. [PMID: 18361586 DOI: 10.1063/1.2889002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The nuclear spin conversion of CH(4) and CD(4) isolated in solid parahydrogen was investigated by high resolution Fourier transform infrared spectroscopy. From the analysis of the temporal changes of rovibrational absorption spectra, the nuclear spin conversion rates associated with the rotational relaxation from the J=1 state to the J=0 state for both species were determined at temperatures between 1 and 6 K. The conversion rate of CD(4) was found to be 2-100 times faster than that of CH(4) in this temperature range. The faster conversion in CD(4) is attributed to the quadrupole interaction of D atoms in CD(4), while the conversion in CH(4) takes place mainly through the nuclear spin-nuclear spin interaction. The conversion rates depend on crystal temperature strongly above 3.5 K for CH(4) and above 2 K for CD(4), while the rates were almost constant below these temperatures. The temperature dependence indicates that the one-phonon process is dominant at low temperatures, while two-phonon processes become important at higher temperatures as a cause of the nuclear spin conversion.
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Affiliation(s)
- Yuki Miyamoto
- Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan
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15
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Jans-Bürli S, Oldani M, Bauder A. Deuterium quadrupole coupling in rotational spectra of benzene-d1and of three isomers of fluorobenzene-d1. Mol Phys 2007. [DOI: 10.1080/00268978900102771] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- S. Jans-Bürli
- a Laboratorium für Physikalische Chemie , Eidgenössiche Technische Hochschule , CH-8092 , Zürich , Switzerland
| | - M. Oldani
- a Laboratorium für Physikalische Chemie , Eidgenössiche Technische Hochschule , CH-8092 , Zürich , Switzerland
| | - A. Bauder
- a Laboratorium für Physikalische Chemie , Eidgenössiche Technische Hochschule , CH-8092 , Zürich , Switzerland
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Behzadi H, Esrafili MD, Hadipour NL. A theoretical study of 17O, 14N and 2H nuclear quadrupole coupling tensors in the real crystalline structure of acetaminophen. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2007.01.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Huber H, Diehl P. Near-Hartree-Fock calculation of the electric field gradients and their first and second derivatives with respect to the bond-length at the location of the deuterium nucleus. Mol Phys 2006. [DOI: 10.1080/00268978500100571] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Ter Horst MA, Jameson CJ, Jameson AK. Molecular reorientation of CD(4) in gas-phase mixtures. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2006; 44:241-8. [PMID: 16477693 DOI: 10.1002/mrc.1756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Spin-lattice relaxation times were measured for the deuterons in CD(4) in pure gas and in mixtures with the following buffer gases: Ar, Kr, Xe, HCl, N(2), CO, CO(2), CF(4), and SF(6). Effective collision cross sections sigma(theta, 2) for the molecular reorientation of CD(4) in collisions with these ten molecules are obtained as a function of temperature. These cross sections are compared with the corresponding cross sections sigma(J) obtained from (1)H spin-rotation relaxation in mixtures of CH(4) with the same set of buffer gases. Various classical reorientation models typically applied in liquids predict different ratios of the reduced correlation times for the reorientation of spherical tops. The Langevin model comes closest to predicting the magnitude of the sigma(theta, 2)/sigma(J) ratio that we obtain for CD(4).
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Affiliation(s)
- Marc A Ter Horst
- Department of Chemistry, University of North Carolina at Chapel Hill, Venable and Kenan Laboratories, Chapel Hill, North Carolina 27599, USA
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Bailey WC. B3LYP Calculation of Deuterium Quadrupole Coupling Constants in Molecules. JOURNAL OF MOLECULAR SPECTROSCOPY 1998; 190:318-323. [PMID: 9668024 DOI: 10.1006/jmsp.1998.7604] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The B3LYP/6-31G(df,3p) model for the calculation of deuterium nuclear quadrupole coupling constants (nqcc's) is shown to yield results as accurate as calculations previously performed at the MP4 level of theory. For 25 molecules, ranging from HD and DF to pyridine and fluorobenzene, the rms difference between the B3LYP nqcc's and the experimental nqcc's is 3.2 kHz (2.7%). For benzene, our calculations suggest that the experimental chibb and chicc of S. Jans-Bürli, M. Oldani, and A. Bauder, 1989. Mol. Phys., 68, 1111-1123) have been incorrectly assigned with respect to inertia axes and should be reversed. For borane carbonyl and nitric acid, it is shown that nqcc calculations using hydrogen bond lengths given by MP2/6-311 + G(d,p) optimizations in combination with the heavy atom experimental structures significantly improve agreement with the experimental nqcc's. Copyright 1998 Academic Press.
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Affiliation(s)
- WC Bailey
- Department of Chemistry and Physics, Kean University, Union, New Jersey, 07083
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22
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Vold RL, Hoatson GL, Subramanian R. Deuteron NMR studies of guest motion in alkanoic acid urea inclusion compounds. J Chem Phys 1998. [DOI: 10.1063/1.476149] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pati R, Das TP, Sahoo N, Ray SN. Theory of Electronic Structure and Nuclear Quadrupole Interactions in Heroin. J Phys Chem A 1998. [DOI: 10.1021/jp980731+] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Wiediger SD, Harland PW, Holt JR, Brooks PR. Characterization of Oriented Molecule Beams by Radio Frequency Spectroscopy. J Phys Chem A 1998. [DOI: 10.1021/jp9724481] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Susan D. Wiediger
- Chemistry Department and Rice Quantum Institute, Rice University, Houston, Texas 77005
| | - Peter W. Harland
- Chemistry Department and Rice Quantum Institute, Rice University, Houston, Texas 77005
| | - Judson R. Holt
- Chemistry Department and Rice Quantum Institute, Rice University, Houston, Texas 77005
| | - Philip R. Brooks
- Chemistry Department and Rice Quantum Institute, Rice University, Houston, Texas 77005
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Vaara J, Hiltunen Y. Deuterium quadrupole coupling tensors in methyl halides:Ab initioeffective core potential and liquid crystal nuclear magnetic resonance study. J Chem Phys 1997. [DOI: 10.1063/1.474569] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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SIGNORELL RUTH, MARQUARDT ROBERTO, QUACK MARTIN, A.SUHM MARTIN. The permanentectric dipole moment of CH2D2: FIR el spectroscopy. Mol Phys 1996. [DOI: 10.1080/002689796174146] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Simpson WR, Rakitzis TP, Kandel SA, Orr‐Ewing AJ, Zare RN. Reaction of Cl with vibrationally excited CH4 and CHD3: State‐to‐state differential cross sections and steric effects for the HCl product. J Chem Phys 1995. [DOI: 10.1063/1.470305] [Citation(s) in RCA: 211] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hollenstein H, Marquardt RR, Quack M, Suhm MA. Dipole moment function and equilibrium structure of methane in an analytical, anharmonic nine‐dimensional potential surface related to experimental rotational constants and transition moments by quantum Monte Carlo calculations. J Chem Phys 1994. [DOI: 10.1063/1.467544] [Citation(s) in RCA: 99] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Böhmer R, Giebenhain U, Loidl A. Dielectric study of partially isotope-substituted solid and liquid hydrogen and methane. Mol Phys 1994. [DOI: 10.1080/00268979400100394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bulthuis J, Milan JB, Janssen MHM, Stolte S. Electric field dependence of reactivity of state‐selected and oriented methylhalides. J Chem Phys 1991. [DOI: 10.1063/1.460200] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Experimental separation of torsional and charge redistribution effects in rotational spectra of HCN dimers. Chem Phys Lett 1987. [DOI: 10.1016/0009-2614(87)80123-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Cummins PL, Bacskay GB, Hush NS, Ahlrichs R. The prediction of nuclear quadrupole moments from ab initio quantum chemical studies on small molecules. I. The electric field gradients at the 14N and 2H nuclei in N2, NO, NO+, CN, CN−, HCN, HNC, and NH3. J Chem Phys 1987. [DOI: 10.1063/1.452390] [Citation(s) in RCA: 79] [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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A molecular beam electric deflection study of clusters: acid and salt molecules in microscopic aqueous and ammonia clusters. Chem Phys 1986. [DOI: 10.1016/0301-0104(86)80012-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Greenfield MS, Vold RL, Vold RR. Deuterium relaxation and vibrationally averaged quadrupole coupling in an alkane/urea clathrate. J Chem Phys 1985. [DOI: 10.1063/1.449428] [Citation(s) in RCA: 52] [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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37
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The electric field gradient at hydrogen and its first and second derivatives with respect to the XH bond-length for first- and second-row hydrides. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/0166-1280(85)80060-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Rothman LS, Gamache RR, Barbe A, Goldman A, Gillis JR, Brown LR, Toth RA, Flaud JM, Camy-Peyret C. AFGL atmospheric absorption line parameters compilation: 1982 edition. APPLIED OPTICS 1983; 22:2247-2256. [PMID: 18196121 DOI: 10.1364/ao.22.002247] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The latest edition of the AFGL atmospheric absorption line parameters compilation for the seven most active infrared terrestrial absorbers is described. Major modifications to the atlas for this edition include updating of water-vapor parameters from 0 to 4300 cm(-1), improvements to line positions for carbon dioxide, substantial modifications to the ozone bands in the middle to far infrared, and improvements to the 7- and 2.3-microm bands of methane. The atlas now contains approximately 181,000 rotation and vibration-rotation transitions between 0 and 17,900 cm(-1). The sources of the absorption parameters are summarized.
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Affiliation(s)
- L S Rothman
- U.S. Air Force Geophysics Laboratory, Optical Physics Division, Hanscom Air Force Base, Massachusetts 01731, USA
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Watson JKG, Takami M, Oka T. Rotational dependence of the dipole moment of CH3D. J Chem Phys 1979. [DOI: 10.1063/1.437470] [Citation(s) in RCA: 39] [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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Lassigne CR, Wells E. NMR relaxation studies and anisotropic molecular reorientation in liquid methyl bromide. ACTA ACUST UNITED AC 1977. [DOI: 10.1016/0022-2364(77)90070-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Muenter AA, Dyke TR. Stark energies for molecules with vibrationally induced dipole moments. J Chem Phys 1975. [DOI: 10.1063/1.431461] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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47
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Ragle JL, Mokarram M. Deuterium quadrupole coupling in solid 1,3,5‐trichlorobenzene‐ d3 and 1,2,3,4‐tetrachlorobenzene‐ d2. J Chem Phys 1975. [DOI: 10.1063/1.430921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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