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Synthesis and spectral-luminescence properties of 2,7-diaminobenzopyrylium tetrafluoroborates

✍ Scribed by M. A. KirpichËok; S. K. Gorozhankin; D. S. Yufit; Yu. T. Struchkov; P. B. Kurapov; I. I. Grandberg

Publisher: Springer US
Year: 1989
Tongue: English
Weight: 859 KB
Volume: 25
Category: Article
ISSN: 0009-3122
DOI: 10.1007/bf00470018

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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