Photochromic dinitrated spiropyrans

Details Photochromic dinitrated spiropyrans Photochromic dinitrated spiropyrans

1990-02-20

1992-10-13

Berch, Mark L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D491107, G03C 1685

Patent

active

051552302

ABSTRACT:
The present invention provides a photochromic material possessing absorption sensitivity in a longer wavelength region when compared with conventional photochromic materials. The photochromic material is a spiropyran compound having a methoxy group at the 6 position, nitro groups at the 8 and 5' positions, and an alkyl group at the 1' position of the spiropyran skeleton as shown below: ##STR1##

REFERENCES:
patent: 3212898 (1965-10-01), Gerreta
patent: 3532638 (1972-10-01), Otis
patent: 3773508 (1973-11-01), Osuda et al.
Arsenor, Chem. Abs., 108, 169151j, (1987).
Bulletin de la Societe Chim de France, No. 5, 1968, pp. 2066-2074 A. Hinnen et al. "Photo des indol, I. Syn. des Products".
M. Morin et al., "Spectral and Photochromic Properties of Two Long-Chain Spiropyranindoline Monolayers at the Air-Solid Interface", Can. Chem., vol. 58, pp. 2038-2043, 1980.
Samoilava, Chemical Abstracts, vol. 83, p. 818, Jul. 7, 1975.

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