| 摘要 |
PURPOSE: To provide a new bissquarylium compd. which has two squaric acid structures in the molecule, has absorption wave lengths suitable in the field of semiconductor laser, and is useful for a dye, an optical disc material, a nonlinear optical material. etc. CONSTITUTION: This novel compd. is represented by formula I [wherein rings A and B are each independently an N-contg. heterocycle; and X is a group represented by formula II (wherein ring C is the same as ring A) or an alkylaminated benzene ring] and derived from a compd. which is represented by formula N (wherein III is an N-contg. heterocycle) and obtd. by a process described in Japan Kokai 94-263758. Examples of rings A, B, and C are N-contg. fused rings represented by formula IV (wherein rings D, E, and F are each independently an optionally substd. benzene or naphthalene ring; and R<1> to R<5> are each an optionally substd. alkyl group optionally forming a ring). |
