COMPLEXATION OF CROWNED SPIRONAPHTHOXAZINES AND THEIR ELECTRONIC ABSORPTION-SPECTRA

Authors
RAZUMOV VF CHERNYKH EV USHAKOV EN NAZAROV VB ALFIMOV MV SAMAT A MAKITA D GUGLIELMETTI R
Citation
Vf. Razumov et al., COMPLEXATION OF CROWNED SPIRONAPHTHOXAZINES AND THEIR ELECTRONIC ABSORPTION-SPECTRA, High energy chemistry, 32(3), 1998, pp. 185-189
Citations number
10
Categorie Soggetti
Chemistry Physical
Journal title
High energy chemistry → ACNP
ISSN journal
00181439
Volume
32
Issue
3
Year of publication
1998
Pages
185 - 189
Database
ISI
SICI code
0018-1439(1998)32:3<185:COCSAT>2.0.ZU;2-3
Abstract
The absorption spectra of novel crowned spironaphthoxazines and their complexes with Ca2+ and Ba2+ are characterized. The stability constant s for the complexes of the compounds investigated are high (the lower limit is 10(6) l/mol). Incorporation of one or two substituents with a crown ether group into the spironaphthoxazine molecule increases the lifetime of the open form. The lifetime remains essentially unchanged upon complexation.