Aromatic compound

An aromatic compound of the following formula (6-1):

• wherein X9, X10, X11 and X12 each independently represent a halogen atom, an alkylsulfonate group, an arylsulfonate group, an arylalkylsulfonate group, a boric ester group, —B(OH)2, a methyl monohalide group, a sulfonium methyl group, a phosphonium methyl group, a phosphonate methyl group, a cyanomethyl group, a formyl group, or a vinyl group;
• Ar6 and Ar7 each independently represent a tri-valent aromatic hydrocarbon group or a tri-valent heterocyclic group, Ar6 and Ar7 may have a substitutent;
• A1 represents O—C(═O), O—C(R1)(R2), N(R5)—C(═O), or N═C(R9) (wherein R1, R2, R5 and R9 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an arylthio group, an arylalkyl group, an arylalkyloxy group, an arylalkylthio group, an acyl group, an acyloxy group, an amide group, an acidimide group, an imine residue, an amino group, a substituted amino group, a substituted silyl group, a substituted silyloxy group, a substituted silylthio group, a substituted silylamino group, a mono-valent heterocyclic group, a hetetoaryloxy group, a heteroarylthio group, an arylalkenyl group, an arylethynyl group, a carboxyl group, an alkyloxycarbonyl group, an aryloxycarbonyl group, an arylalkyloxycarbonyl group, a heteroaryloxycarbonyl group or a cyano group, R1, R2, R3 and R4 may be mutually connected to form a ring), and
• the compound represented by formula (6-1) may have substituents on the benzene ring in the compound, and the substituents may be connected mutually to form a ring.