Nuclear magnetic dipole moments from NMR spectra

Antušek, Andrej; Jackowski, Karol; Jaszuński, Michał; Makulski, Włodzimierz; Wilczek, Marcin

doi:10.1016/j.cplett.2005.06.022

Cited by 75 publications

(88 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measurement of shielding can be easily extended on MAS nuclear MR experiments as it was already shown for 13 C spectra [16]. All the above conclusions are true and vital for the method of shielding measurements.…”

Section: Discussionmentioning

confidence: 82%

“…(2). 13 C MR spectrum of liquid ethyl crotonate obtained on a 500 MHz Varian INOVA spectrometer with the scale of magnetic shielding. The weak signal at σ = 33.58 ppm comes from a small amount of tetramethylsilane (TMS) present in this sample.…”

Section: Discussionmentioning

confidence: 99%

“…where ν, µ and I are the resonance frequencies in a constant external magnetic field, the nuclear magnetic moments [3,13] and the spin numbers of helium-3 and another observed nucleus (X), respectively. Let us add that the resonance frequencies are strictly proportional to nuclear magnetic shielding in a constant magnetic field.…”

Section: Measurements Of Magnetic Shieldingmentioning

confidence: 99%

“…When a small amount of investigated compound is dispersed in a gaseous solvent, then the measurements are performed changing the density of this solvent, cf. for example also our 1 H, 13 C and 15 N one-and two-dimensional MR spectra of acetonitrile [5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Brief Review on Bioactive Compounds from Species

Taha¹,

A.Hadi²,

Mohd³

2013

TOPROCJ

View full text Add to dashboard Cite

Gas-phase multinuclear magnetic resonance (MR) spectra allow the total elimination of intermolecular effects from magnetic shielding in molecules. Consequently, the resonance frequencies of isolated atoms and molecules are also available for reading from MR spectra. Following the connectivity between nuclear magnetic moments, resonance frequencies of two different nuclei in the same MR experiment and the shielding of helium-3, it is demonstrated that the direct shielding measurement is available on a nuclear MR spectrometer. As shown, the shielding parameters can completely replace the chemical shifts of numerous nuclei. The new method has also many additional advantages; as it allows for example the direct comparison of experimental and theoretical shielding constants and makes possible the determination of the first order isotope effect in shielding, which was not available in nuclear MR spectroscopy before.

show abstract

Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Section: Measurements Of Magnetic Shieldingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Brief Review on Bioactive Compounds from Species

Taha¹,

A.Hadi²,

Mohd³

2013

TOPROCJ

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the absolute shielding constant is important as a benchmark for quantum-chemical methods for calculating NMR parameters [4][5][6][7][8] as well as for the determination of nuclear magnetic moments. 9,10 The magnetic moment of a nucleus may also interact with the magnetic moment induced by the molecular rotation arising from the small decoupling of the rotation of the electrons from the rotation of the nuclear framework. 11 This interaction is observable as the hyperfine structure in highresolution rotational microwave spectra and is described by the nuclear spin-rotation tensor.…”

Section: Introductionmentioning

confidence: 99%