Photochromic compound

Details Photochromic compound Photochromic compound

1993-03-02

1994-03-15

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

430 19, 430332, 430339, 430343, 430962, 252586, 548418, 548427, 549 41, 549 45, 549 46, 549 47, 549 48, 549 61, 549 81, 549 82, 549 83, 549381, 549382, 549388, G03C 173, C07D33350

Patent

active

052945227

ABSTRACT:
A novel photochromic compound as a photoreactive material making use of photochromism is provided, which compound is expressed by the following formula (1) or (2)): ##STR1## wherein R is alkyl, alkoxy, perfluoroalkyl or cyano; X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5 and X.sub.6 are each H, halogen, alkyl, alkoxy, cyano, alkanoyloxy or alkyloxycarbonyl, or a substituted or unsubstituted benzene ring is formed by condensation between at adjacent groups among X.sub.1 to X.sub.6 ; Y is Y.sub.1 C=CY.sub.2, O, S, SO, SO.sub.2 or NY.sub.3 wherein Y.sub.1 and Y.sub.2 are each as defined in the case of the above X.sub.1 to X.sub.6 and Y.sub.3 is H, alkyl, alkanoyl, alkyloxycarbonyl or aryl; and the symbol refers to occurrence of E- or Z-isomer, and which compound is useful as rewritable optical memory element or photo-display element and also as solar energy-storage material, duplicating material, masking material, optical filter, toys, etc.

REFERENCES:
patent: 5234799 (1993-08-01), Nagal et al.
CA78(3):15971b, Jan. 1973.
CA118(13):123863w, Mar. 1993.
CA118(19):187424m, May 1993.

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