| 摘要 |
<p>Disclosed is an indolium compound represented by the general formula (I) below. (I) (In the formula, ring A represents a benzene ring or a naphthalene ring; ring B represents a five-membered or six-membered heterocyclic ring or an aromatic ring; Z represents an alkyl group having 1-8 carbon atoms which may be substituted by a halogen group or interrupted by -O-, -CO-, -OCO- or -COO-, a sulfonyl group having a hydrocarbon group having 1-8 carbon atoms, a sulfinyl group having a hydrocarbon group having 1-8 carbon atoms, an alkylamino group having an alkyl group having 1-8 carbon atoms, a dialkylamino group having an alkyl group having 1-8 carbon atoms, a cyano group, a nitro group, a hydroxyl group or a halogen group; R<SUP>1</SUP> represents a group represented by the general formula (II) or (II'); R<SUP>2</SUP> represents an organic group having 1-30 carbon atoms or a group represented by the general formula (II), (II') or (III); Y represents a group represented by the general formula (III); n represents an integer of 0-4; An<SUP>m-</SUP> represents an m-valent anion and m represents 1 or 2; and p represents a coefficient required for neutralizing the electrical charge.)</p> |
