Claims
- 1. A photochromic material comprising a compound, belonging to the diheteroarylethene class, represented by the following general formula [I]:
- 2. A photochromic material as claimed in claim 1, wherein the ring opening quantum yield is 10−3 or lower.
- 3. A photochromic material as claimed in claim 1 or 2, wherein R1 and R4 in the substituents [i]-[iv] of said general formula [I] each comprise independently an alkoxy group having 1-3 carbon atoms.
- 4. A photochromic material as claimed in claim 3, wherein R1 and R4 each comprise a methoxy group.
- 5. A photochromic material described in anyone of claims 1-4 wherein Q in Q-Ar corresponding to R2 and R5 in the substituents [i]-[iv] of said general formula [I] each comprise independently a direct bond, —(—CH═CH—)n— (i.e. a polyethylene group) (wherein n=1-5), or —(—C″C—)n— (i.e. a polyacetylene group) (wherein n=1-5), whereby Ar comprises a single 5- or 6-member ring, or two or three 5- or 6-member rings directly bonded or condensed, each of said rings being optionally substituted.
- 6. A photochromic material as claimed in claim 5, wherein Ar in Q-Ar corresponding to R2 and R5 is selected independently from the group consisting of the following formulae:
- 7. A photochromic material as claimed in claim 6, wherein R2 and R5 are each selected independently from the group consisting of the following formulae:
- 8. A photochromic material described in any one of claims 1 through 7, wherein R3 and R6 each comprise independently a linear alkyl group.
- 9. A photochromic material described in any one of claims 1 through 8, wherein the photochromic material comprises a compound, belonging to the diheteroarylethene class, selected from the group consisting of the following formulae:
Priority Claims (1)
Number |
Date |
Country |
Kind |
2001-60382 |
Mar 2001 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a continuation application of PCT/JP02/01946 filed on Mar. 4, 2002.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/JP02/01946 |
Mar 2002 |
US |
Child |
10649868 |
Aug 2003 |
US |