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I. Molecular transfer of non-equilibrium nuclear spin magnetization. II. Electron resonance of an organic free radical in zero field

Citation

Thompson, Don Dean (1960) I. Molecular transfer of non-equilibrium nuclear spin magnetization. II. Electron resonance of an organic free radical in zero field. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-07052006-130411

Abstract

Part I contains a new magnetic resonance technique that has been developed to measure rates of fast molecular processes. The method involves the experimental introduction of a nonequilibrium nuclear magnetization in one system, A, and the subsequent measurement of the rate at which rapid molecular processes transfer this nonequilibrium magnetization to a second system, B. Systems A and B may correspond to different chemical sites in a molecule that give rise to a chemical shift, or to sites that are distinct because of electron coupled spin-spin interaction. This technique has been applied to determinations of the rate of proton exchange between ammonium ions in aqueous solution.

Part II contains a description of a theoretical and experimental investigation of zero field electron spin resonance of malonic acid radicals produced by X-irradiation at room temperature. The radicals produced in a single crystal are oriented in a specific manner. The theory involved predicts six lines of equal intensity, except for a very small Boltzmann factor. Some of these transitions have been found experimentally in a small modulation field at 77°K. The electron is presumed to "precess" in the field of the proton; however, the energy levels cannot be explained classically. A detailed account of the experimental apparatus is given.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • McConnell, Harden M.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1960
Record Number:CaltechETD:etd-07052006-130411
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-07052006-130411
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2813
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:19 Jul 2006
Last Modified:26 Dec 2012 02:54

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