Some nitrogen-14 NMR studies in solids
The first order quadrupolar perturbation of the /sup 14/N NMR spectrum yields information regarding the static and dynamic properties of the surrounding electronic environment. Signal to noise problems caused by long /sup 14/N longitudinal relaxation times (T/sub 1/) and small equilibrium polarizations are reduced by rotating frame cross polarization (CP) experiments between /sup 14/N and /sup 1/H. Using quadrupolar echo and CP techniques, the /sup 14/N quadrupolar coupling constants (e/sup 2/qQ/h) and asymmetry parameters (eta) have been obtained for a variety of tetraalkylammonium compounds by observation of their quadrupolar powder patterns at various temperatures. For choline chloride and iodide the /sup 14/N NMR powder patterns exhibit the effects of anisotropic molecular motion, while choline bromide spectra show no such effects.
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- Technical Report
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- Other Information: Portions are illegible in microfiche products. Thesis
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- Lawrence Berkeley Lab., CA (USA)
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- United States
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CHOLINE; STRUCTURAL CHEMICAL ANALYSIS; NITROGEN 14; NUCLEAR MAGNETIC RESONANCE; QUATERNARY COMPOUNDS; HALIDES; ALCOHOLS; AMINES; AMMONIUM COMPOUNDS; DRUGS; HALOGEN COMPOUNDS; HYDROXY COMPOUNDS; ISOTOPES; LIGHT NUCLEI; LIPOTROPIC FACTORS; MAGNETIC RESONANCE; NITROGEN ISOTOPES; NUCLEI; ODD-ODD NUCLEI; ORGANIC COMPOUNDS; RESONANCE; STABLE ISOTOPES 400201* -- Chemical & Physicochemical Properties
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