PHOTOCHROMIC SPIROPYRANS OF COUMARIN SERIES

Authors
METELITSA AV KNYAZHANSKY MI IVANITSKY VV NIKOLAEVA OG PALCHKOV VA PANINA AP SHELEPIN NE MINKIN VI
Citation
Av. Metelitsa et al., PHOTOCHROMIC SPIROPYRANS OF COUMARIN SERIES, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 246, 1994, pp. 37-40
Citations number
3
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
246
Year of publication
1994
Pages
37 - 40
Database
ISI
SICI code
1058-725X(1994)246:<37:PSOCS>2.0.ZU;2-W
Abstract
Novel spiropyrans on the base of 4-methyl-7-hydroxy-8-formylcoumarine (I) and 7-R-4-hydroxy-3-formylcoumarine (II) are synthesized. The comp ounds (I) and (II) exhibit in solution respectively direct and inverse photochromic reaction. The influence of the heterene moiety and solve nt polarity on spectral and photochromic properties have been studied. The indoline derivatives of (I) are also photochromic in crystal.