A diaminostilbene series compound and a method for forming an image using the same

摘要

There is disclosed a novel diaminostilbene series compound, a method for forming an image using the same, and a composition comprising the same. The diaminostilbene compound is represented by the following formula (I):wherein L¹ and L², which are the same or different, each represent -OR¹ or -N-R²(R³), wherein the four substituents L¹ and L² have four or more substituents in total selected from substituents represented by the following formula (II); R¹ and R² each represent a hydrogen atom, an alkyl group, or an alkyl group having a substituent selected from substituents represented by the formula (II); R³ represents an alkyl group or an alkyl group having a substituent selected from substituents represented by the formula (II); and M represents a hydrogen atom, an alkali metal, an ammonium, or a pyridinium:formula (II) -SO₃M, -OSO₃M, -COOM, and -NR₃Xwherein X represents a halogen atom, R represents an alkyl group, and M has the same meaning as M in formula (I).