[PDF] Top 20 Solid-State NMR of Quadrupolar Nuclei for Structural Elucidation

... Cl − site in Isox, which have similar four-contact environments, also share very similar quadrupolar parameters. This could lead one two believe that the IsoxI sample is simply a mixture of two different ... See full document

... 1.2. Thesis Overview and Motivation 7 characterisations that help to cement understanding of borates, as well as the important differences between crystalline and disordered materials. Initial NMR results are also ... See full document

... frequency (in the range 5 to 20 kHz) for the case of the B4 site with the smaller quadrupolar coupling. Thus, for the B4 site, where the experimental dephasing rate shows no marked dependence on the MAS frequency, ... See full document

... the solid-state chemist is the ability to predict and control the properties of compounds and, therefore, to design a material (and the requisite synthetic route) specifically for a particular ...the ... See full document

... in structural rearrangement of the Pd lattice into a hexagonal crystal ...Pd solid state NMR alongside 11 B solid state NMR, 7 Li solid state NMR and ... See full document

... for quadrupolar nuclei, ...the NMR interaction tensors with respect to the applied ...the NMR spectrum from a sample of a powdered solid is the superposition of the spectra associated ... See full document

... high-resolution solid-state NMR spectra of quadrupolar nuclei, the inherently low sensitivity of the multiple-quantum magic-angle spinning (MQMAS) experiment has limited its application ... See full document

... the NMR phenomenon and NMR spec- ...the solid state rather than in solution or the liquid ...physical state of inter- est. However, NMR spectroscopy of solids differs in many ... See full document

... of NMR-active nuclides are quadrupolar, and there has been considerable effort to address this issue over the last 30 years, with approaches developed to remove completely the quadrupolar ...design. ... See full document

... 1/2 nuclei, such as the dipolar coupling and the J anisotropy, yielding a spectrum containing only the average isotropic components of the shielding and the J ... See full document

... Solid-state NMR spectroscopy is a powerful complement as it makes it possible to circumvent some of the limitations of ...spectroscopy. NMR experiments are most commonly carried out on ... See full document

... values extracted from spectra obtained at 21.1 T are ca. 1 MHz higher than those from spectra at 9.4 T, indicating that there may be significant chlorine CSA contribution that is unaccounted for. Simulated spectra at ... See full document

... Solid-state NMR is a uniquely suited technique to determine the structure of specifically labeled membrane peptides and ...electric quadrupolar splittings, from which structural ... See full document

... initial state (the thermal equilibrium bulk magnetisation aligned along the z -axis) than can be created in a powdered solid with a selective radiofrequency pulse, where the effect of the pulse depends on ... See full document

... The appearance of the static spectra are indicative of the presence of substantial titanium CSA (Figure 4.2); it is not possible to simulate the static powder patterns using only the quadrupolar interaction ... See full document

... the NMR simulation software WSOLIDS, SHARCNET (Shared Hierarchical Academic Research Computing Network) facilities for computational resources, and especially to ... See full document

... sample) NMR spectra were acquired at both moderate and ultra-high magnetic field strengths ...anisotropic NMR interactions. There are very few reports of 115 In MAS NMR in the literature; 29,32,36,37 ... See full document

... for solid-state NMR structural analysis at the University of Southampton, providing only their unit cell parameters and space groups while withholding their ... See full document

... general, NMR experiments detect single quantum coherences, ...the NMR signal decreases strongly with increasing ...for solid imaging arises because the rate of phase evolution of a multiple quantum ... See full document

... The H-NMR spectra and colors of fractions 1,2,3 and 5 suggested the presence of carotenoids, fatty acids, sterols and sterols endoperoxides respectively, and hence these fractions were not investigated further ... See full document