Magnetic susceptibility measurement by NMR: 2. The magnetic susceptibility of NMR solvents and their chemical shifts

Quantifying the ion coordination strength in polymer electrolytes

“…This can, however, be rationalized by considering the change in magnetic susceptibility in the solution on addition of the polymer to the solution, shifting the baseline to higher values. 30 Indeed, the same phenomenon should be present in the case of Li + and Na + with PEO; however, since the effect of coordination to the polymer is so pronounced, the effect of the change in magnetic susceptibility becomes disguised. At sufficiently high polymer concentrations, the polymer-Na + coordination dominates over the magnetic susceptibility effect and a declining chemical shift is indeed observed.…”

Sensing Magnetic Field and Intermolecular Interactions in Diamagnetic Solution Using Residual Dipolar Couplings of Zephycandidine

“…This situation would be different for any solvent which directly and strongly interacts with the solute. It is clear from Figure 6 a, that the splitting Δ υ in dimethyl sulfoxide- d 6 do not follow expected by theory dependence on B 0 2 when compared to that for chloroform- d or toluene- d 8 and could not be explained by the temperature dependence of the magnetic susceptibility [ 36 , 37 , 38 ]. The observed deviation provides a measure of an additional energy which zephycandidine require to reorientation itself in such solution and could be experimentally estimated from the ln(Δ υ ) plots shown in Figure 6 b (more details are given in Section 3.5 and Supplementary Material ).…”

“…Relative permeability is very closely related to the volume magnetic susceptibility, i.e., μ sol = 1 + χ sol . Magnetic susceptibility has been proven to have a measurable influence on the spectral parameters such as chemical shift and linewidth, and depends on the sample quality, geometry, environment, and temperature [ 35 , 36 , 37 , 38 ]. Diamagnetic solvents have a relative magnetic permeability that is less than or equal to one and therefore, the effective magnetic field B eff experienced by the solute is usually smaller than the external magnetic field B 0 .…”

“…The values of magnetic susceptibility (χ sol ) of deuterated solvents in air at normal pressure were taken from reference [ 38 ] with exception of acetic acid- d 6 for which the protonated value from [ 59 , 60 ] was assumed in the absence of the value for its deuterated form and ethanol- d 6 which was taken from [ 61 ]. Supplementary Material Table S1 lists all these values explicitly as well as molar volumes, boiling points, refractive indexes, dielectric constants, and dipole moments for both deuterated and protonated solvents used [ 62 , 63 ].…”

Sulfonium-Pincer Ligands Flexibility in Pt(II) Complexes

“…NMR spectra were measured using Bruker 400 MHz Neo and 500 MHz Neo and Avance II spectrometers. Residual solvent peaks were used as internal standards for 1 H chemical shifts, δ, at 25 °C and correspond to the chemical shift of dilute TMS in the same solvent 24 (CDCl 3 : δ 7.262 ppm; CD 2 Cl 2 : δ 5.318 ppm increasing by 0.0008 ppm/K on cooling, CD 3 OD: δ 3.307 ppm, CD 3 NO 2 : δ 4.341 ppm, DMSO-d 6 : δ 2.502 ppm, and CD 3 CN: δ 1.940). Other nuclei were referenced to the 1 H reference frequency multiplied by the standard ratios: 2511 B 0.32083974, 13 C 0.25145020, 19 F 0.94094011, 31 P 0.40480742, and 195 Pt 0.21496784.…”