NMR studies of nondiamagnetic solids /

Bibliographic Details
Main Author:	Campbell, Gordon Creston
Other Authors:	Cotton, F. Albert (degree committee member.), Lunsford, Jack H. (degree committee member.), Russell, David H. (degree committee member.)
Format:	Thesis Book
Language:	English
Published:	1989.
Subjects:	Nuclear magnetic resonance spectroscopy. Diamagnetism. Copper > Magnetic properties. Major chemistry. Academic theses
Online Access:	ProQuest, Abstract Link to OAKTrust copy

Description
Abstract:	The intent of the research presented in this Dissertation is to demonstrate the potential which nuclear magnetic resonance (NMR) spectroscopy holds for determining magnetic and structural properties of nondiamagnetic solids. The general applicability of the technique will be illustrated through consideration of representative examples drawn from fields of chemistry, physics (materials science), and biology. Cross polarization magic-angle spinning (CP/MAS) NMR experiments on paramagnetic lanthanide and actinide complexes illustrate the viability of the technique for studying solids with favorable electronic properties (i.e., short T[1e]'s) . The temperature dependence of observed chemical shifts not only allows a tunability of spectral resolution, but also the refinement of variable-temperature (VT) experimental protocol and procedures. This development is essential for the further study of nondiamagnetic transition-metal complexes, whose magnetic properties are often very sensitive to temperature variations between 300 and 77 K. VT CP/MAS NMR allows the establishment of magneto-structural correlations in exchange-coupled Cu(II) and Fe(III) systems. Anhydrous copper(II) carboxylates, synthetic ferredoxin analog compounds, and μ-oxo bridged Fe(III) porphyrins are considered in turn. The potential for the use of VT CP/MAS NMR spectroscopy for the study of high-spin low-spin crossover compounds is also illustrated via some representative Fe(II) examples. Results are shown to be characteristic of crossover cooperativity. The Fe/Zn solid-solution approach to the investigation of these materials provides an effective framework in which to deduce line broadening influences and paramagnetic relaxation effects in CP/MAS NMR spectroscopy.
Item Description:	Typescript (photocopy). Vita. "Major subject: Chemistry."
Physical Description:	xv, 219 leaves : illustrations ; 29 cm
Bibliography:	Includes bibliographical references.