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Fleck S, Böhm MC, Weiden N, Weiss A. Hydrogen bonds in ammonium hydrogen-DL-malate monohydrate studied by2H-NMR, IR, and LCAO-MO calculations. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.19870911116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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2
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Structural properties in mixed LiK1−(NH4) SO4 (x= 0, 0.06, and 1) crystals by nuclear magnetic resonance. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Lim AR. Study on the structural properties and relaxation mechanisms in LiRb(1-x)(NH₄)(x)SO₄ (x=0, 0.5, and 1) mixed crystals by ¹H, ⁷Li, and ⁸⁷Rb nuclear magnetic resonance. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2011; 39:14-20. [PMID: 21481572 DOI: 10.1016/j.ssnmr.2011.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 01/31/2011] [Accepted: 03/15/2011] [Indexed: 05/30/2023]
Abstract
LiRb(1-x)(NH₄)(x)SO₄ (x=0, 0.5, and 1) mixed crystals were grown using the slow evaporation method, and their lattice constants were determined by X-ray diffraction. The effects of replacing ammonium ions with rubidium on the phase transitions of and dynamics of LiRb(1-x)(NH₄)(x)SO₄ mixed crystals were studied. We investigated the structural properties and phase transition temperatures of the LiRb(1-x)(NH₄)(x)SO₄ mixed crystals by performing ¹H, ⁷Li, and ⁸⁷Rb NMR relaxation and DSC. When a fraction of rubidium ions in the pure LiRbSO₄ crystal is partially replaced by ammonium ions, we compare the structural properties for LiRbSO₄, LiRb₀.₅(NH₄)₀.₅SO₄, and LiNH₄SO₄ single crystals. The ¹H, ⁷Li, and ⁸⁷Rb NMR relaxation mechanisms of LiRb₀.₅(NH₄)₀.₅SO₄ are different from those of pure LiRbSO₄ and LiNH₄SO₄; the sequence of the structural phase transitions of LiRb₀.₅(NH₄)₀.₅SO₄ is different, which might be related to the dynamics and orientation of the sulfate tetrahedral groups in the crystal structure.
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Affiliation(s)
- Ae Ran Lim
- Department of Science Education, Jeonju University, Jeonju 560-759, Republic of Korea.
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4
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Ono H, Ishimaru S, Ikeda R, Ishida H. Ionic plastic phase in piperidinium hexafluorophosphate studied by solid NMR, X-Ray diffraction, and thermal measurements. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19981020408] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Oh JS, Kim MH, Song AR, Rho JR. A New 5α, 8α-Epidioxy Sterol from the Marine Sponge Plakortis simplex. JOURNAL OF THE KOREAN MAGNETIC RESONANCE SOCIETY 2010. [DOI: 10.6564/jkmrs.2010.14.1.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Lim AR, Jung WK. ^1H NMR Relaxation Study of Molecular Motion in the Paraelectric Phase of (NH 4) 2Cd 2(SO 4) 3Single Crystals. JOURNAL OF THE KOREAN MAGNETIC RESONANCE SOCIETY 2010. [DOI: 10.6564/jkmrs.2010.14.1.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Ishida H, Iwachido T, Ikeda R. Phase Transitions in Dimethylammonium Tetrafluoroborate and Molecular Motions in Its Ionic Plastic Phase Studied by 1H and 19F NMR, Thermal Measurements, and X-Ray Powder Diffraction Techniques. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19920961023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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Nuclear Magnetic Relaxation and Spin Jumping Between Three Unequal Potential Wells. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19890931210] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Sasaki A, Furukawa Y, Nakamura D. Reorientational Motions and Self-Diffusion of Ions in (NH4)3[InF6] and (NH4)3[GaF6] Crystals as Studied by 1H and 19F Nuclear Magnetic Resonance and Electrical Conductivity Experiments. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19890931019] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Mallikarjunaiah KJ, Damle R, Ramesh KP. Study of molecular dynamics and cross relaxation in tetramethylammonium hexafluorophosphate (CH(3))(4)NPF(6) by (1)H and (19)F NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 34:180-185. [PMID: 18824332 DOI: 10.1016/j.ssnmr.2008.08.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 05/30/2008] [Accepted: 08/12/2008] [Indexed: 05/26/2023]
Abstract
(CH(3))(4)NPF(6) is studied by NMR measurements to understand the internal motions and cross relaxation mechanism between the heterogeneous nuclei. The spin lattice relaxation times (T(1)) are measured for (1)H and (19)F nuclei, at three (11.4, 16.1 and 21.34 MHz) Larmor frequencies in the temperature range 350-50K and (1)H NMR second moment measurements at 7 MHz in the temperature range 300-100K employing home made pulsed and wide-line NMR spectrometers. (1)H NMR results are attributed to the simultaneous reorientations of both methyl and tetramethylammonium groups and motional parameters are evaluated. (19)F NMR results are attributed to cross relaxation between proton and fluorine and motional parameters for the PF(6) group reorientation are evaluated.
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11
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Latanowicz L. Complex methyl group and hydrogen-bonded proton motions in terms of the Arrhenius and Schrödinger equations. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 34:93-104. [PMID: 18023155 DOI: 10.1016/j.ssnmr.2007.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2007] [Accepted: 10/03/2007] [Indexed: 05/25/2023]
Abstract
Equations for the temperature dependence of the spectral densities J(is)(m)(momega(I) +/-omega(T)), where m=1, 2, omega(I) and omega(T) are the resonance and tunnel splitting angular frequencies, in the presence of a complex motion, have been derived. The spin pairs of the protons or deuterons of the methyl group perform a complex motion consisting of three component motions. Two of them involve mass transportation over the barrier and through the barrier. They are characterized by k((H)) (Arrhenius) and k((T)) (Schrödinger) rate constants, respectively. The third motion causes fluctuations of the frequencies (nomega(I)+/-omega(T)) and it is related to the lifetime of the methyl spin at the energy level influenced by the rotor-bath interactions. These interactions induce rapid transitions, changing the symmetry of the torsional sublevels either from A to E or from E(a) to E(b). The correlation function for this third motion (k((omega)) rate constant) has been proposed by Müller-Warmuth et al. The spectral densities of the methyl group hindered rotation (k((H)), k((T)) and k((omega)) rate constants) differ from the spectral densities of the proton transfer (k((H)) and k((T)) rate constants) because three compound motions contribute to the complex motion of the methyl group. The recently derived equation [Formula: see text] , where [Formula: see text] and [Formula: see text] are the fraction and energy of particles with energies from zero to E(H), is taken into account in the calculations of the spectral densities. This equation follows from Maxwell's distribution of thermal energy. The spectral densities derived are applied to analyse the experimental temperature dependencies of proton and deuteron spin-lattice relaxation rate in solids containing the methyl group. A wide range of temperatures from zero Kelvin up to the melting point is considered. It has been established that the motion characterized by k((omega)) influences the spin-lattice relaxation up to the temperature T(tun) only. This temperature is directly determined by the equation C(p)T=E(H) (thermal energy=activation energy), where C(p) is the molar heat capacity. Probably the cessation of the third motion is a result of the de Broglie wavelength related to this motion becoming too short. As shown recently, the potential barrier can be an obstacle for the de Broglie wave. The theoretical equations derived in this paper are compared to those known in the literature.
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Affiliation(s)
- L Latanowicz
- Faculty of Biological Sciences, University of Zielona Góra, Szafrana 1, 5-516 Zielona Góra, Poland.
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12
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Reynhardt EC, Pratt JC, Watton A, Petch HE. NMR study of molecular motions and disorder in K3ZrF7and K2TaF7. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/31/017] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Reynhardt EC, Hoon CF. Molecular dynamics and structures of amine boranes of the type R3N.BH3. II. NMR investigation of H3N.BH3. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/16/32/008] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Reynhardt EC. Molecular dynamics and structures of amine boranes of the type R3N.BH3. III. NMR investigation of (CH3)3N.BH3. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/19/11/019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Kozak A, Grottel M, Koziol AE, Pajak Z. An X-ray and NMR cross-relaxation study of structure and ion motions in C(NH2)3BF4. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/20/33/002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Ono H, Ishimaru S, Ikeda R, Ishida H. 1H,2H,19F,31P, and35Cl NMR Studies on Molecular Motions in Ionic Plastic Phases of Pyrrolidinium Perchlorate and Hexafluorophosphate. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1999. [DOI: 10.1246/bcsj.72.2049] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Mortimer M, Moore EA, Williams MAK. 7Li nuclear magnetic spin–lattice relaxation investigation of lithium trifluoromethanesulfonate and its complex with poly(ethylene oxide). ACTA ACUST UNITED AC 1996. [DOI: 10.1039/ft9969205043] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Driehuys B, Cates GD, Happer W. Surface relaxation mechanisms of laser-polarized 129Xe. PHYSICAL REVIEW LETTERS 1995; 74:4943-4946. [PMID: 10058638 DOI: 10.1103/physrevlett.74.4943] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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19
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Ono H, Seki R, Ikeda R, Ishida H. 1H and 19F NMR studies on molecular motions and phase transitions in solid triethylammonium tetrafluoroborate. J Mol Struct 1995. [DOI: 10.1016/0022-2860(94)08451-m] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Ishida H, Asaji T, Furukawa Y, Ikeda R. 1H and19F NMR Studies on Phase Transitions and Ionic Motions in Choline Tetrafluoroborate. CHEM LETT 1993. [DOI: 10.1246/cl.1993.1207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Ishida H, Hayama N, Ikeda R. Phase Transitions and Ionic Motions Including Self-Diffusion in Solid Trimethylammonium Tetrafluoroborate Studied by1H and19F NMR. CHEM LETT 1992. [DOI: 10.1246/cl.1992.1333] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Ishida H, Takagi K, Ikeda R. An Ionic Plastic Phase of 1,1-Dimethylhydrazinium Tetrafluoroborate Revealed by1H and19F NMR and Thermal Measurements. CHEM LETT 1992. [DOI: 10.1246/cl.1992.605] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Reynhardt E, Froneman S. Phase transitions and molecular motions in crystallineortho- andmeta-carborane. Mol Phys 1991. [DOI: 10.1080/00268979100102061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Basson I, Reynhardt EC. Identification of defect chain motions in the low temperature orthorhombic phase of binary mixtures ofn‐alkanes by means of nuclear magnetic resonance spin‐lattice relaxation time measurements. J Chem Phys 1991. [DOI: 10.1063/1.461152] [Citation(s) in RCA: 24] [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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25
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Basson I, Reynhardt EC. Identification of a defect chain motion inn‐alkanes by means of nuclear magnetic resonance spin–lattice relaxation time measurements. J Chem Phys 1990. [DOI: 10.1063/1.458792] [Citation(s) in RCA: 18] [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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26
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Dimitropoulos C, Pelzl J, Borsa F. 2D NMR and 35Cl nuclear-quadrupole-resonance study of ammonium-ion motion and phase transitions in natural and deuterated (NH4)2TeCl6. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:3914-3919. [PMID: 9994207 DOI: 10.1103/physrevb.41.3914] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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27
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Reynhardt E. Spin-lattice relaxation and molecular motion in the sodium salt of phosphoenolpyruvate. Chem Phys Lett 1989. [DOI: 10.1016/0009-2614(89)87425-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Reynhardt E, Froneman S. 1H, 23Na and 31P N.M.R. in the disodium salt of glucose 1-phosphate. Mol Phys 1989. [DOI: 10.1080/00268978900100631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- E.C. Reynhardt
- a Department of Physics , University of South Africa , P.O. Box 392, Pretoria , 0001 , South Africa
| | - S. Froneman
- a Department of Physics , University of South Africa , P.O. Box 392, Pretoria , 0001 , South Africa
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Hirschinger J, Meurer B, Weill G. Nuclear spin relaxation in a vinylidene fluoride and trifluoroethylene copolymer 70/30 - I. Dynamics and morphology in the ferroelectric phase. ACTA ACUST UNITED AC 1989. [DOI: 10.1051/jphys:01989005005056300] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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30
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Harrell JW. Relaxation time study of diammonium hydrazinium (+2) tetraperchlorate. J Chem Phys 1987. [DOI: 10.1063/1.452479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Chiba T, Miyajima S. Sulfate ion motion in ammonium sulfate crystal as studied by low field proton magnetic relaxation of17O enriched species. J Chem Phys 1985. [DOI: 10.1063/1.449587] [Citation(s) in RCA: 7] [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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33
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Proton magnetic resonance study of some crystalline p-polyphenyls: Evidence of relaxation by slow molecular motions above room temperature. Chem Phys 1985. [DOI: 10.1016/0301-0104(85)80124-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Kubo A, Ikeda R, Sampedro JA, Inoue M, Nakamura D. Motion of CF3Groups and Phase Transition in [Cu4(CF3COO)4]·2C6H6as Studied by1H and19F NMR Techniques. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1985. [DOI: 10.1246/bcsj.58.2947] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Harrell JW. Molecular motions and phase transitions in diammonium hydrazinium(+2) disulfate. J Chem Phys 1985. [DOI: 10.1063/1.448342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Watton A, Pratt JC, Reynhardt EC, Petch HE. An NMR study of the solid phase of trifluoromethane. J Chem Phys 1982. [DOI: 10.1063/1.444154] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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37
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38
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Reynhardt EC, Watton A, Petch HE. Proton magnetic resonance study of classical reorientations and tunneling in LiNH4SO4. J Chem Phys 1982. [DOI: 10.1063/1.442972] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Eguchi T, Kishita M, Chihara H, Soda G. 1H and19F Nuclear Magnetic Relaxation Studies of Molecular Motion in Solid Fluoroform. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1982. [DOI: 10.1246/bcsj.55.676] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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Yamauchi J, McDowell CA. Magnetic relaxation study of solid ammonia–boron trifluoride complex. J Chem Phys 1981. [DOI: 10.1063/1.442063] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Reynhardt EC, Watton A, Petch HE. Nuclear magnetic resonance study of ionic motions in ammonium bifluoride. J Chem Phys 1979. [DOI: 10.1063/1.438247] [Citation(s) in RCA: 8] [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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42
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Watton A, Koster E, Sandhu HS, Petch HE. The 1H–19F coupled nuclear magnetic relaxation in (NH4)2TiF6. J Chem Phys 1979. [DOI: 10.1063/1.437362] [Citation(s) in RCA: 7] [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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43
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Furukawa Y, Kiriyama H. Molecular Motion in Ammonium Hydrogendifluoride Studied by Pulsed NMR. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1979. [DOI: 10.1246/bcsj.52.339] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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44
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Albert S, Ripmeester JA. Cross relaxation in NMR studies of crystalline symmetrical trifluorobenzene (C6H3F3). J Chem Phys 1979. [DOI: 10.1063/1.437574] [Citation(s) in RCA: 11] [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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45
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Furukawa Y, Kiriyama H. Ionic Motion and Phase Transition in Potassium Hydrogendifluoride KHF2Studied by Pulsed NMR. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1978. [DOI: 10.1246/bcsj.51.3438] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Watton A. The effects of hindered rotation of the ammonium ion on nuclear magnetic spin–lattice relaxation. J Chem Phys 1976. [DOI: 10.1063/1.433552] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [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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Tsang T, Utton DB. Proton magnetic relaxation and internal rotations in tetramethylammonium cadmium chloride. J Chem Phys 1976. [DOI: 10.1063/1.432694] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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49
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London RE, Matwiyoff NA, Mueller DD. Spin lattice relaxation in an AM{Xn} system: Application to13C relaxation in enriched molecules. J Chem Phys 1975. [DOI: 10.1063/1.431164] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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50
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Leffler AJ, Alexander MN, Sagalyn PL, Walker N. Molecular reorientation and boron nuclear quadrupole interaction in crystalline ortho-carborane. J Chem Phys 1975. [DOI: 10.1063/1.431836] [Citation(s) in RCA: 28] [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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