ChemInform Abstract: (73)GE‐NMR‐UNTERSUCHUNGEN

Kaufmann, Jens; Sahm, W.; Schwenk, A.

doi:10.1002/chin.197150067

Cited by 3 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Of course, the accuracy of the result clearly depends on what the Another situation where isotope shifts have some effect is when signals of the reference compound are affected, for instance for 19 F measurements. In this case, the signal is split into four lines with intensities approximately 27:27:9:1 because the natural-abundance isotopic ratio 35 Cl: 37 Cl is ca. 3:1.…”

Section: Referencing Proceduresmentioning

confidence: 99%

NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001)

Harris

Becker

Menezes

et al. 2001

Pure and Applied Chemistry

1,197

1,084

View full text Add to dashboard Cite

Republication or reproduction of this report or its storage and/or dissemination by electronic means is permitted without the need for formal IUPAC permission on condition that an acknowledgmentAbstract: A unified scale is recommended for reporting the NMR chemical shifts of all nuclei relative to the 1 H resonance of tetramethylsilane (TMS). The unified scale is designed to provide a precise ratio, Ξ, of the resonance frequency of a given nuclide to that of the primary reference, the 1 H resonance of TMS in dilute solution (volume fraction, ϕ < 1%) in chloroform. Referencing procedures are discussed, including matters of practical application of the unified scale. Special attention is paid to recommended reference samples, and values of Ξ for secondary references on the unified scale are listed, many of which are the results of new measurements.Some earlier recommendations relating to the reporting of chemical shifts are endorsed. The chemical shift, δ, is redefined to avoid previous ambiguities but to leave practical usage unchanged. Relations between the unified scale and recently published recommendations for referencing in aqueous solutions (for specific use in biochemical work) are discussed, as well as the special effects of working in the solid state with magic-angle spinning. In all, nine new recommendations relating to chemical shifts are made.Standardized nuclear spin data are also presented in tabular form for the stable (and some unstable) isotopes of all elements with nonzero quantum numbers. The information given includes quantum numbers, isotopic abundances, magnetic moments, magnetogyric ratios and receptivities, together with quadrupole moments and line-width factors where appropriate.

show abstract

Section: Referencing Proceduresmentioning

confidence: 99%

NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001)

Harris

Becker

Menezes

et al. 2001

Pure and Applied Chemistry

1,197

1,084

View full text Add to dashboard Cite

show abstract

“…In such situations the correction term in parentheses in Eqn (8) Another situation where isotope shifts have some effect is when signals of the reference compound are affected, for instance for 19 F measurements. In this case the signal is split into four lines with intensities approximately 27 : 27 : 9 : 1 because the natural-abundance isotopic ratio 35 Cl : 37 Cl is ca 3 : 1. Since CFCl 3 is firmly accepted as the local reference for 19 F, it is not reasonable to suggest a new alternative.…”

Section: Referencing Proceduresmentioning

confidence: 99%

“…Since CFCl 3 is firmly accepted as the local reference for 19 F, it is not reasonable to suggest a new alternative. It is recommended that the reference signal is that of CF 35 Cl 2 37 Cl). Earlier IUPAC documentation 1,2 did not suggest any specific composition for the reference sample or choice of solvents.…”

Section: Referencing Proceduresmentioning

confidence: 99%

NMR nomenclature: nuclear spin properties and conventions for chemical shifts. IUPAC Recommendations 2001. International Union of Pure and Applied Chemistry. Physical Chemistry Division. Commission on Molecular Structure and Spectroscopy

Harris¹,

Becker²,

Menezes³

et al. 2002

Magnetic Reson in Chemistry

141

View full text Add to dashboard Cite

“…2919; Uvasol). The 73Ge and 39K reference samples were GeC14 (a neat liquid) and a 31 molal solution of KNO 2 in D20 ; both samples were used in former work and described there [6,8,9].…”

Section: Samplesmentioning

confidence: 99%

89Yttrium nuclear magnetic resonance studies

1977

Self Cite

View full text Add to dashboard Cite

With a Fourier-transform spectrometer, especially developed for nuclei with weak NMR signals, the lines of 89y have been investigated in aqueous solutions of Y(NO3)3, YC13, and Y(C104) 3. The concentration dependence of the chemical shifts of the 89y resonance frequencies in these solutions were measured. Using this dependence, the Larmor frequency of the 89 y3 + ion solely surrounded by water was determined by extrapolation. The Larmor frequency of 89y was referred to those of 2H, 39K, and 73Ge with high accuracy. The magnetic moment of the agy3+ ion purely surrounded by H20 molecules is #(sgy3+)= -0.136 852 3 (4) #N. The concentration dependence of Y(NO 3) 3 solutions in D 20 yields the solvent isotope effect 3(89Y 3+ in D20)-cS(89Y 3+ in H20)=-(4.3+0.5)ppm. The S9y relaxation times T 1 and T 2 of a 3 molal aqueous Y(NO3) 3 solution were determined in the pH range-0.5... +1.25. T~=190...90s is nearly constant in this range, whereas the transverse relaxation rate T2-1 increases strongly with increasing pH; this effect seems to be due to the chemical exchange of the hydrated y3+ ion between a monomer and a polymer site.

show abstract

ChemInform Abstract: (73)GE‐NMR‐UNTERSUCHUNGEN

Cited by 3 publications

References 1 publication

NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001)

NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001)

NMR nomenclature: nuclear spin properties and conventions for chemical shifts. IUPAC Recommendations 2001. International Union of Pure and Applied Chemistry. Physical Chemistry Division. Commission on Molecular Structure and Spectroscopy

89Yttrium nuclear magnetic resonance studies

Contact Info

Product

Resources

About