PHOTOCHROMIC AND SPECTROKINETIC PROPERTIES OF VACUUM-DEPOSITED FILMS OF SPIROBENZOPYRANS

Authors
VOLOSHIN NA METELITSA AV TROFIMOVA NS VDOVENKO AV KNYAZHANSKY MI SHELEPIN NE MINKIN VI
Citation
Na. Voloshin et al., PHOTOCHROMIC AND SPECTROKINETIC PROPERTIES OF VACUUM-DEPOSITED FILMS OF SPIROBENZOPYRANS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 297, 1997, pp. 445-449
Citations number
8
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
297
Year of publication
1997
Pages
445 - 449
Database
ISI
SICI code
1058-725X(1997)297:<445:PASPOV>2.0.ZU;2-G
Abstract
Novel formylsubstituted spiropyrans of the indoline series have been s ynthesized. Reversible photochromism was observed in vacuum-deposited thin thin solid films of the spirans obtained by evaporation under a p ressure of 2.10(-5) Torr and a boat temperature of 130-180 degrees C. Kinetic characteristics of the photochromic transformations depend mos tly on the bulkiness on the substituents in both indoline and 2H-chrom ene fragments of the spiropyrans. An irreversible photoreaction leadin g to photodegradation of the photochromic system occurs on prolonged U V-irradiation of thin solid films of the spiropyrans.