BIS-(POLYETHER)AZOBENZENES: THEIR UTILITY AS PHOTORESPONSIVE COMPLEXING AGENTS FOR THE ALKALI METALS.
Item
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Title
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BIS-(POLYETHER)AZOBENZENES: THEIR UTILITY AS PHOTORESPONSIVE COMPLEXING AGENTS FOR THE ALKALI METALS.
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Identifier
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AAI8713791
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identifier
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8713791
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Creator
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RIZZO, THOMAS PATRICK.
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Contributor
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Paul Haberfield
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Date
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1987
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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, Organic
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Abstract
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In this work four bis(polyether) azobenzenes: (1) bis-4,4'- 2-methoxyethoxy)acetamido azobenzene (Cm-1); (2) bis-4,4'- 2-(2-methoxyphenoxy)acetamido azobenzene (Cm-2); (3) bis-4,4'- 2- (1,3-dimethoxy-2-propoxy)acetamido azobenzene (Cm-3); (4) bis-4,4'- 2- 2-(2-methoxyethoxy)ethoxy acetamido azobenzene (Cm-4) were synthesized and characterized. The trans isomers of the bis- (polyether)-azobenzenes were photoisomerized to the cis isomers. Solvent and structural effects were observed on the photostationary state and thermal cis-trans isomerization rates. The partition coeffi- cients for the bis(polyether)azobenzenes between water and various organic solvents were determined. The utility of these compounds as photoresponsive complexing agents for the alkali metals was investigated via a sensitive extraction technique. The extraction involved the use of sodium 5-(4'-N,N-dimethylaminophenylazo)-8-nitro-2-naphthalenesulfonate as a dye, which was synthesized for this purpose. The extraction technique was used to obtain equi- librium constants for dibenzo-18-crown-6 with the alkali metals for comparison with the bis(polyether)azobenzenes.
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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
