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Clough S, Horsewill A, Johnson M, Sutcliffe J, Tomsah I. Rotational quantization of methyl groups in a rotating frame. Mol Phys 2007. [DOI: 10.1080/00268979400100641] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Colmenero J, Moreno AJ, Alegría A. Neutron scattering investigations on methyl group dynamics in polymers. Prog Polym Sci 2005. [DOI: 10.1016/j.progpolymsci.2005.08.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Birczyński A, Lalowicz Z, Łodziana Z. Rotational barriers in ammonium hexachlorometallates as studied by NMR, tunnelling spectroscopy and ab initio calculations. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2003.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Moreno AJ, Alegría A, Colmenero J, Frick B. Methyl Group Dynamics in Poly(methyl methacrylate): From Quantum Tunneling to Classical Hopping. Macromolecules 2001. [DOI: 10.1021/ma0100854] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. J. Moreno
- Departamento de Física de Materiales y Centro Mixto CSIC-UPV/EHU, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | - A. Alegría
- Departamento de Física de Materiales y Centro Mixto CSIC-UPV/EHU, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | - J. Colmenero
- Departamento de Física de Materiales y Centro Mixto CSIC-UPV/EHU, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | - B. Frick
- Institute Laue Langevin, BP 156X, F-38042 Grenoble, France
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Clough S. A kinetic theory of the temperature dependence of methyl tunnelling spectra. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/7/007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Clough S, Heidemann A, Horsewill AJ, Lewis JD, Paley MNJ. The correlation of methyl tunnelling and thermally activated reorientation. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/19/002] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Koksal F, Rossler E, Sillescu H. Spin-lattice relaxation by tunnelling motions of methyl groups in four acetates. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/15/28/014] [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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Hewson AC. The temperature dependence of inelastic neutron scattering in rotational tunnelling systems. II. Calculation of the time-dependent correlation functions. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/15/18/004] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Clough S, Heidemann A, Horsewill AJ, Lewis JD, Paley MNJ. The rate of thermally activated methyl group rotation in solids. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/15/11/026] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hewson AC. The temperature dependence of inelastic neutron scattering in rotational tunnelling systems. I. Formulation and perturbation theory. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/15/18/003] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
Assumptions on which NMR dynamical studies have been based for nearly 50 years are consistent with a relative quantum theory based on Minkowski spacetime. A symmetry condition required by the existence of reference frames takes over the usual role of particle permutation symmetry, leaving a quantum theory of relative motion which only involves observables.
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Affiliation(s)
- S Clough
- Department of Physics, University of Nottingham, UK
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Jefferson JH, Häusler W. Effective charge-spin models for quantum dots. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:4936-4947. [PMID: 9986456 DOI: 10.1103/physrevb.54.4936] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Müser MH, Helbing W, Nielaba P, Binder K. Low-temperature anharmonic lattice deformations near rotator impurities: A quantum Monte Carlo approach. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1994; 49:3956-3962. [PMID: 9961684 DOI: 10.1103/physreve.49.3956] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Prager M, Wakabayashi N, Monkenbusch M. Coupling the methyl group in acetamide to phonons: a consistent view of tunnelling and lattice dynamics. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/bf01307656] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Braun D, Weiss U. Dynamics of the damped rotational tunneling system: The effect of librational excitations. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01320514] [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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Buekenhoudt A. Temperature dependence of methyl reorientation at intermediate hindering potentials. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:5377-5386. [PMID: 10004318 DOI: 10.1103/physrevb.46.5377] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Helbing W, Nielaba P, Binder K. Quantum Monte Carlo treatment of a rotator impurity in a crystal. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:4200-4205. [PMID: 10000068 DOI: 10.1103/physrevb.44.4200] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Symmetry breaking in thermally activated NH4 rotation studied by NMR level crossing spectroscopy. Chem Phys 1991. [DOI: 10.1016/0301-0104(91)85009-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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W�rger A, H�ller A. Rotational tunnelling: The width of the quasi-elastic line. ACTA ACUST UNITED AC 1990. [DOI: 10.1007/bf01313330] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Methyl rotation in acetamide: the transition from quantum mechanical tunneling to classical reorientation studied by inelastic neutron scattering. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf01323489] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Poizat O, Fillaux F, Sourisseau C. Vibrational study of metal-substituted MPS3 layered compounds: MII1−xMI2xPS3 with MII = Mn, Cd, and MI = Cu (x = 0.13) or Ag (x = 0.50). J SOLID STATE CHEM 1988. [DOI: 10.1016/0022-4596(88)90031-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Clough S, Barker GJ, Abed KJ, Horsewill AJ. Molecular friction and nuclear magnetism. PHYSICAL REVIEW LETTERS 1988; 60:136-139. [PMID: 10038218 DOI: 10.1103/physrevlett.60.136] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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The symmetry of the methyl hindering potential and the temperature independence of the tunnel frequency in 4-methylpyridine. Chem Phys Lett 1987. [DOI: 10.1016/0009-2614(87)85012-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Prager M, Stanislawski J, Häusler W. Inelastic incoherent neutron scattering study of the methyl rotation in various methyl halides. J Chem Phys 1987. [DOI: 10.1063/1.452059] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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The Temperature Dependence of Rotational Tunneling — Simulation of a Quantum System at Finite Temperatures. ACTA ACUST UNITED AC 1987. [DOI: 10.1007/978-3-642-71914-1_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Prager M, Langel W. Intermolecular interaction in Sn(CH3)4: An inelastic neutron scattering study of matrix isolated molecules. J Chem Phys 1986. [DOI: 10.1063/1.451670] [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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Coppens P, Punkkinen M, Vandemaele G. Coupled (Zeeman-tunnel)-lattice relaxation of the methyl group in copper acetate. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 33:7494-7502. [PMID: 9938113 DOI: 10.1103/physrevb.33.7494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Gabryś B, Higgins JS, Young DA. Rotation of methyl groups in molecular solids and polymers at low temperatures: recent developments. POLYMER 1985. [DOI: 10.1016/0032-3861(85)90194-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fivez J, De Raedt B. Dynamics of a molecular impurity coupled to phonons: Computer simulation. J Chem Phys 1983. [DOI: 10.1063/1.446192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Takeda S, Chihara H. Methyl rotation in 1,2,4,5-tetramethylbenzene and tetramethylpyrazine in the solid state. Tunneling spectra by proton NMR. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0022-2364(83)90050-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Affiliation(s)
- Richard M. Stratt
- Department of Chemistry, Brown University, Providence, Rhode Island 02912
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