About: Xe-129 NMR chemical shift in Xe@C-60 calculated at experimental conditions: Essential role of the relativity, dynamics, and explicit solvent     Goto   Sponge   NotDistinct   Permalink

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  • The isotropic Xe-129 nuclear magnetic resonance (NMR) chemical shift (CS) in Xe@C-60 dissolved in liquid benzene was calculated by piecewise approximation to faithfully simulate the experimental conditions and to evaluate the role of different physical factors influencing the Xe-129 NMR CS. The Xe-129 shielding constant was obtained by averaging the Xe-129 nuclear magnetic shieldings calculated for snapshots obtained from the molecular dynamics trajectory of the Xe@C-60 system embedded in a periodic box of benzene molecules. Relativistic corrections were added at the Breit-Pauli perturbation theory (BPPT) level, included the solvent, and were dynamically averaged. It is demonstrated that the contribution of internal dynamics of the Xe@C-60 system represents about 8% of the total nonrelativistic NMR CS, whereas the effects of dynamical solvent add another 8%. The dynamically averaged relativistic effects contribute by 9% to the total calculated Xe-129 NMR CS. The final theoretical value of 172.7 ppm corresponds well to the experimental Xe-129 CS of 179.2 ppm and lies within the estimated errors of the model. The presented computational protocol serves as a prototype for calculations of Xe-129 NMR parameters in different Xe atom guest-host systems.
  • The isotropic Xe-129 nuclear magnetic resonance (NMR) chemical shift (CS) in Xe@C-60 dissolved in liquid benzene was calculated by piecewise approximation to faithfully simulate the experimental conditions and to evaluate the role of different physical factors influencing the Xe-129 NMR CS. The Xe-129 shielding constant was obtained by averaging the Xe-129 nuclear magnetic shieldings calculated for snapshots obtained from the molecular dynamics trajectory of the Xe@C-60 system embedded in a periodic box of benzene molecules. Relativistic corrections were added at the Breit-Pauli perturbation theory (BPPT) level, included the solvent, and were dynamically averaged. It is demonstrated that the contribution of internal dynamics of the Xe@C-60 system represents about 8% of the total nonrelativistic NMR CS, whereas the effects of dynamical solvent add another 8%. The dynamically averaged relativistic effects contribute by 9% to the total calculated Xe-129 NMR CS. The final theoretical value of 172.7 ppm corresponds well to the experimental Xe-129 CS of 179.2 ppm and lies within the estimated errors of the model. The presented computational protocol serves as a prototype for calculations of Xe-129 NMR parameters in different Xe atom guest-host systems. (en)
Title
  • Xe-129 NMR chemical shift in Xe@C-60 calculated at experimental conditions: Essential role of the relativity, dynamics, and explicit solvent
  • Xe-129 NMR chemical shift in Xe@C-60 calculated at experimental conditions: Essential role of the relativity, dynamics, and explicit solvent (en)
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  • Xe-129 NMR chemical shift in Xe@C-60 calculated at experimental conditions: Essential role of the relativity, dynamics, and explicit solvent
  • Xe-129 NMR chemical shift in Xe@C-60 calculated at experimental conditions: Essential role of the relativity, dynamics, and explicit solvent (en)
skos:notation
  • RIV/61388963:_____/13:00394735!RIV14-GA0-61388963
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  • I, P(GA13-03978S), P(GA203/09/2037)
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  • 22
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  • 117562
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  • RIV/61388963:_____/13:00394735
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  • Xe-129 NMR; Xe@C-60; dynamical averaging; explicit solvent; relativistic effects (en)
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  • US - Spojené státy americké
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  • [A7B52CBF47A7]
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  • Journal of Computational Chemistry
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  • 34
http://linked.open...iv/tvurceVysledku
  • Straka, Michal
  • Marek, R.
  • Standara, Stanislav
  • Kulhánek, P.
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  • 000321437900004
issn
  • 0192-8651
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http://bibframe.org/vocab/doi
  • 10.1002/jcc.23334
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