Patent ID: 7094516

Claim:
A benzobisazole-based compound represented by the following general formula (3a): (wherein P 3 and P 4 each independently represent a substituted or unsubstituted naphthyl group, with the proviso that, in the case of a substituted naphthyl group, a substituent is selected from the group consisting of halogen atoms, a hydroxyl group, an amino group and substituted or unsubstituted alkyl, alkoxy, aralkyloxy, aryloxy, alkenyloxy, alkylthio, aralkylthio, arylthio, alkenylthio, mono-substituted amino, di-substituted amino and acyloxy groups, at least one of P 3 and P 4 is a substituted naphthyl group, and at least one of the substituents represents an alkoxy group having two to three oxygen atoms in a carbon chain).