MAGNETICALLY INDUCED LINEAR DICHROISM IN LIQUID SOLUTIONS.
Item
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Title
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MAGNETICALLY INDUCED LINEAR DICHROISM IN LIQUID SOLUTIONS.
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Identifier
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AAI8212223
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identifier
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8212223
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Creator
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ZELMANOVIC, DAVID.
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Contributor
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Raymond L. Disch
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Date
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1982
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Language
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English
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Publisher
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City University of New York.
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Subject
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Chemistry, Physical
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Abstract
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We have developed an instrument capable of measuring differences in absorption coefficients as small as 10('-5) optical density units. Greatly enhanced S/N is achieved by including the light source in an opto-electronic feedback network. Additionally, use of a tunable dye laser increases light intensity and open-loop gain by two orders of magnitude relative to other light sources. This stabilizes closed-loop gain by making it more nearly independent of changes in open-loop gain parameters.;We have developed The Theory of Magnetically Induced Linear Dichroism (MLD) in Liquid Solutions. The MLD is expressed as a function of the applied static magnetic field tensor,;(DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI).;by expanding it in a Maclaurin series in.;(DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI).;Included are the dependences on.;(DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI).;of the line shape function, S('LK) the oscillator strength tensor,;(DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI).;and the probability function, (OMEGA). It is shown that the coefficient of.;(DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI).;is the first nonzero term in the expansion.;The general predictions of the theory are outlined and the major features of the MLD spectra of liquid solutions of various lanthanide ions and metal porphyrins are discussed in light of these predictions. The spectrum of horse heart ferrocytochrome c is analyzed in detail and the results compared with results obtained from Magnetic Optical Rotatory Dispersion (MORD) spectra. They are in excellent agreement. Information concerning the anisotropy of the diamagnetic susceptibility of the MLD spectrum. This information is not obtainable through MORD or other techniques.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Chemistry
