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US 8,598,340 B2Granted
Spirooxazine radical derivatives and reversible isomerization reaction
AssigneeNEC Corporation
InventorAtsumasa Sawada
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Abstract
The present invention can provide new spirooxazine radical derivatives of the following general formula (1) which have chromic property enabling the distinction between the radical species and the cation species on the basis of absorption wavelength:
Claims6
Spirooxazine-like radical compounds of the following formula (1):
- wherein,
- X1 is a chalcogen element, alkylidene or cycloaklylidene group,
- X2 is a sulfur atom,
- R1 to R11 are, independently each other, hydrogen atom, alkyl with 1 to 4 carbons, alkoxy, aryl, halogenated alkyl, cyano, amino, or nitro group, or halogen atom, or any of R1 to R11 bonded to carbon atoms adjacent to each other may form in combination an aromatic or heterocyclic ring;
- and
- n is 0 or 1.
3 more elements
Dependencies are inferred from the claim text.