NOVEL FATIGUE-RESISTANT SPIROOXAZINES

Authors
METELITSA AV KNYAZHANSKY MI PALCHKOV VA ZUBKOV OA VDOVENKO AV SHELEPIN NE MINKIN VI
Citation
Av. Metelitsa et al., NOVEL FATIGUE-RESISTANT SPIROOXAZINES, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 246, 1994, pp. 33-36
Citations number
2
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
33 - 36
Database
ISI
SICI code
1058-725X(1994)246:<33:NFS>2.0.ZU;2-#
Abstract
Novel photochromic fatigue-resistant spirooxazines of the phenantrene and phenantroline series were synthesized and studied in solutions and PMMA films. The efficiency of photocoloration (eta=0,36-0,95) is clos e to that of 6-NO2-BIPS (eta=1). Kinetics of the dark bleaching is of nonexponential type with tau 1/2=2-7 s and 18-32 s (T=298 K) in soluti ons and PMMA respectively. The number of coloring-bleaching cycles n-2 10-1320 (PMMA) substantially overcomes that of 6-NO2-BIPS (n=11).