Tl. Brack et al., Photochemical formation of 4 '-N,N-dimethylamino-3-hydroxyflavone in hydrocarbon solutions of 4-N,N-dimethylamino-2 '-hydroxychalcone., TETRAHEDR L, 40(21), 1999, pp. 3995-3998
The appearance of a fluorescence emission band at 553 nm from hydrocarbon s
olutions of 4-N,N-dimethylamino-2'-hydroxychalcone was found to he sensitiv
e to the presence of dissolved oxygen and exposure to ambient visible light
. The 390 nm peak of this band's excitation profile along with the fluoresc
ence maximum suggest that a low yield photoreaction occurs leading to the f
ormation of the highly fluorescent 4'-N,N-dimethylamino-3-hydroxyflavone. (
C) 1999 Elsevier Science Ltd. All rights reserved.