Boyce, Scott D. and Hoffmann, Michael R. and Hong, P. Andrew and Moberly, Lorraine M. (1983) Catalysis of the autoxidation of aquated sulfur dioxide by homogeneous metal-phthalocyanine complexes. Environmental Science and Technology, 17 (10). pp. 602-611. ISSN 0013-936X. https://resolver.caltech.edu/CaltechAUTHORS:20150820-073728749
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Abstract
The autoxidation of sulfur dioxide to sulfate in aqueous solution has been examined over the pH range 4-13 in the presence of water-soluble transition metal-4,4’,4”,4”‘-tetrasulfophthaloc anine com lexes, MTSP (where M = Fe^(II), Mn^(II),Co^(II), Ni^(II), Cu^(II), and V^(IV). Experimental rate data have been analyzed in terms of a Michaelis-Menten kinetic expression derived from a bisubstrate kinetic model. The rate law and spectroscopic measurements indicate that the reaction proceeds via the formation of an activated complex in which O_2 and two molecules of SO_3^(2-) are reversibly bonded to the catalytic center. Relative reactivity is determined by the ability of the central metal atom to reversibly bind molecular oxygen. Analysis of the spectroscopic data suggests that photaassisted catalysis arises from the absorption of light by a ternary activated complex.
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Additional Information: | © 1983 American Chemical Society. Received for review December 21,1982. Accepted May 23,1983. Financial support for this research was provided by the U.S. Environmental Protection Agency under Contract R808086-01. | |||||||||
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Issue or Number: | 10 | |||||||||
Record Number: | CaltechAUTHORS:20150820-073728749 | |||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150820-073728749 | |||||||||
Official Citation: | Catalysis of the autoxidation of aquated sulfur dioxide by homogeneous metal-phthalocyanine complexes Scott D. Boyce, Michael R. Hoffman, P. Andrew. Hong, and Lorraine M. Moberly Environmental Science & Technology 1983 17 (10), 602-611 DOI: 10.1021/es00116a008 | |||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
ID Code: | 59780 | |||||||||
Collection: | CaltechAUTHORS | |||||||||
Deposited By: | Ruth Sustaita | |||||||||
Deposited On: | 20 Aug 2015 21:44 | |||||||||
Last Modified: | 03 Mar 2020 13:01 |
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