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Oxygen Exclusion from the Organic Solvents Using Ultrasound and Comparison with Other Common Techniques Used in Photochemical Experiments

T. Vencel, J. Donovalová, A. Gáplovský, T. Kimura, and Š. Toma

Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava

 

E-mail: vencel@fns.uniba.sk

Received: 27 March 2004

Abstract: We compared three different methods for exclusion of oxygen from organic solvents. Removal of oxygen was determined by quenching of anthracene fluorescence in acetone, propan-2-ol, chloroform, heptane, and benzene. The best degassing method was found to be freeze-pump-thaw method and bubbling of nitrogen through the solution. The least effective was ultrasound method. The best degassing by ultrasound was observed in acetone and propan-2-ol.

Full paper in Portable Document Format: 594a271.pdf

 

Chemical Papers 59 (4) 271–274 (2005)

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