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Synthesis and spectral-luminescence properties of 7-diethylamino-4-(2-arylethenyl)coumarins

✍ Scribed by I. I. Tkach; N. A. Andronova; L. P. Savvina; E. A. Luk'yanets

Publisher
Springer US
Year
1991
Tongue
English
Weight
299 KB
Volume
27
Category
Article
ISSN
0009-3122

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The absorption and luminescence spectra of a series of 4,7-diaminocoumarins have been investigated in ethanol and acetonitrile solution. The pkJ and pkJ 1 values for several of the compounds have been measured. It has been found that the site of primary protonation is the nitrogen atom in the 7-posi