NEW PHOTOCHROMIC 10'-SUBSTITUTED SPIRO[INDOLINE-NAPHTHOXAZINES]

Authors
CHAMONTIN K LOKSHIN V GARROS G SAMAT A GUGLIELMETTI R DUBEST R
Citation
K. Chamontin et al., NEW PHOTOCHROMIC 10'-SUBSTITUTED SPIRO[INDOLINE-NAPHTHOXAZINES], Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 297, 1997, pp. 283-287
Citations number
12
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
283 - 287
Database
ISI
SICI code
1058-725X(1997)297:<283:NP1S>2.0.ZU;2-Q
Abstract
New photochromic 10'-substituted spiro[indoline-naphthoxazines] were s ynthesized and spectrokinetic parameters determined. Introduction of a substituent on the 10'-position have no significant influence an maxi mum wavelength absorption but the fading rate constant is highly incre ased. According to semi-empirical calculation, this behavior could be due to Steric hindrance occuring, on the open form, between the methyl group linked on the indolinic nitrogen and the 10'-substituent.