Patent ID: 6836383
Filing Date: 2004-12-28
Classification: C09B,G02B

Abstract:
A diphenylsquarylium compound characterized in that it is represented by the following general formula (I) [in the formula (I), R1 represents an alkyl group which may have substituent(s), an alkoxy group which may have substituent(s), a cycloalkyl group which may have substituent(s), an aryl group which may have substituent(s), an aryloxy group which may have substituent(s), or a halogen atom, W in Wâ€”Xâ€”R2 represents imino group, an alkylimino group or oxygen atom, X represents carbonyl group or sulfonyl group, R2 represents a monovalent group or hydrogen atom, l and lâ€² are each independently an integer of from 0 to 4, m and mâ€² are each independently an integer of from 0 to 4, n and nâ€² are each independently an integer of from 1 to 5, wherein l+m+n&lE;5 and lâ€²+mâ€²+nâ€²&lE;5, and when two or more of R1 and Wâ€”Xâ€”R2 are respectively present on the benzene rings, the respective R1 and Wâ€”Xâ€”R2 may be different from one another on one benzene ring or both benzene rings].