✦ LIBER ✦

The pressure-dependence of fluorescence intensity and photolysis rate of the vapors of carbon bisulfide, nitrogen dioxide, and sulfur dioxide

✍ Scribed by V. I. Makarov

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 819 KB
Volume: 22
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550220102

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✦ Synopsis

This article is concerned with the Stern-Volmer dependence on the NOz, SOz, and CS2 fluorescence self-quenching within a wide range of pressure variations of these gases. Besides, the pressure-dependences of the photolysis rate of these substances have been investigated. The deviations from linearity in the Stern-Volmer dependences and photolysis rate of NOz, SOz, and CS2 in the high pressure region have been revealed. These deviations correspond to increasing effective rate constant of the collision quenching of excited molecules NOZ, SOz, and CS2.

A model to describe the deviations observed has been proposed. The model assumes the formation of excimer particles which may dissociate in a monomolecular way and may be quenched a t collisions. The estimates of the lifetimes of excimer particles yield the values of the order of several nanoseconds.

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