UV/Vis spectroscopic behaviour of some new hydroxy azocoumarin derivatives

Autor:	A. M. Abdel-Mawgoud, M. M.A. Hamed, H. M. Mostafa
Rok vydání:	1997
Předmět:	Ultraviolet visible spectroscopy Chemistry Atomic electron transition Intermolecular force Solvatochromism Organic chemistry General Chemistry Photochemistry Wavelength band Tautomer Spectral line
Zdroj:	Monatshefte f�r Chemie Chemical Monthly. 128:553-561
ISSN:	1434-4475 0026-9247
DOI:	10.1007/bf00807585
Popis:	The UV/Vis spectroscopic behaviour of six new hydroxy azocoumarin compounds in solution has been investigated. The observed bands are assigned to electronic transitions. Azocoumarin compounds exist mainly in the azo form, whereas 6-(2-hydroxy-6-aminonaphthyl-1-azo)-coumarin exhibits an azo-hydrazone tautomeric equilibrium. The solvatochromic behaviour of the azo compounds is investigated by studying their spectra in pure and mixed organic solvents of different characteristics. The longer wavelength band of the azocoumarins inDMF solution is assigned to an intermolecular CT transition.
Databáze:	OpenAIRE
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