ISSN:
0887-624X
Keywords:
anthraquinone
;
hydrogen peroxide
;
hydrogel
;
anthrahydroquinone
;
10-hydroxyanthrone
;
water
;
2-propanol
;
polymer-bound photocatalyst
;
thin film
;
solar photolysis
;
hydroxylated anthraquinone
;
phototautomerization
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Photoreductions of polymer-bound anthraquinone in degassed water- and 2-propanolswollen 2-hydroxyethyl methacrylate hydrogel films were performed at 313 and 334 nm, and in sunlight for the water-swollen system. The quantum yield at 334 nm for production of anthrahydroquinone was 0.31 in water and 0.94 in 2-propanol. Results at 313 nm were very similar. A reversible oxygen insensitive side product, indentified as 10-hydroxyanthrone, was produced simultaneously to the anthrahydroquinone in water-swollen films, but not for 2-propanol. A small amount of irreversible side product, believed to be hydroxylated anthraquinone, was also formed in the water system. A photochemical reaction scheme is suggested to account for these observations. Hydrogen peroxide production from photoreduction-reoxidation cycling of the hydrogels is reported.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pola.1992.080300210
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