Nonaqueous Colorimetric Method for Determination of Ozone

Delman, A. D.; Ruff, Alexander; Simms, B. B.; Allison, A. R.

doi:10.1021/ba-1959-0021.ch016

Cited by 4 publications

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“…On the other hand, it has been known that various oxidants oxidize alkylaromatic amines to colored species recognized as nitrogen cation radicals, called Würster's salts (Delman et al, 1959a;Murray and Story, 1964), with the accompanying anions. Thus, a number of aromatic amines have been suggested as reagents for the determination of ozone in purified water (Galster, 1962) or in the atmosphere (Delman et al, 1959b) and used as antiozonants in the rubber industry (Layer, 1966).…”

Section: Resultsmentioning

confidence: 99%

Ozonation of aqueous solutions of fenuron

Benítez¹,

Beltrán‐Heredia²,

González³

1991

Ind. Eng. Chem. Res.

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Section: Resultsmentioning

confidence: 99%

Ozonation of aqueous solutions of fenuron

Benítez¹,

Beltrán‐Heredia²,

González³

1991

Ind. Eng. Chem. Res.

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“…Also of considerable interest are the reported conver sions, during ozonation, of phenylenediamines to Wurster's salts (VII) (8,14), of liquid ammonia to ammonium ozonate (VA) at a low tem perature (18), and of amines to amine hydrochlorides (VB) in chlori nated hydrocarbon solvents (17,19). Finally, an early report states that azobenzene and quinone are obtained upon ozonation of aniline (i5).…”

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Ozonation of Amines

Bailey

Keller

Mitchard

et al. 1968

Advances in Chemistry

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A review of the literature concerning reactions of ozone with amines has given rise to the working hypothesis that these reactions all involve initially the electrophilic attack of ozone to give an adduct for which at least three different reaction routes are available: loss of molecular oxygen to give an amine oxide or further reaction products thereof, an intramolecular oxidation of a side chain, and dissociation to nitrogen cation radicals and the ozonate anion radical, followed by further reactions of these. Results from ozonations of tert-butylamine and tri-n-butylamine, which furnish additional evidence for the above competitions, are described.>Tphe literature suggests several ways in which ozone reacts with amines.

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On the mechanism of ozone degradation of SBR

Delman¹,

Simms²,

Ruff³

1960

J. Polym. Sci.

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The reaction mechanism of the ozone attack of SBR copolymers was studied to obtain information for use in the development of elastomeric materials having improved resistance to deterioration in service. Techniques of ultracentrifugation and viscometry were utilized to follow molecular changes induced by ozone. Chemical changes were investigated by measuring variations in active oxygen group concentration. Results suggest that the autocatalytic degradation of uninhibited SBR was initiated by a random ozone attack at a double bond on the unozonized chain, producing an ozonide which decomposed spontaneously, forming small segments with activated chain‐ends. This primary reaction, in the presence of oxygen, activated an α‐methylenic chain cleavage process which was terminated when the molecules were degraded to a limiting size, where no more R. radicals were formed from α‐methylenic groups. The reaction was also terminated when oxygen was removed from the system.

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Nonaqueous Colorimetric Method for Determination of Ozone

Cited by 4 publications

References 0 publications

Ozonation of aqueous solutions of fenuron

Ozonation of aqueous solutions of fenuron

Ozonation of Amines

On the mechanism of ozone degradation of SBR

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