Branched chain-containing aromatic compound

A branched chain-containing aromatic compound represented by the general formula (I):

• wherein
• Q in the number of k are a single bond, or O, S, CO2, CONH or NH;
• Ra in the number of k are each independently an organic group having at least one aliphatic hydrocarbon group having one or more branched chains, a total number of the branched chain of not less than 3 and a total carbon number of not less than 14 and not more than 300;
• k is an integer of 1-4;
• R1 is a hydrogen atom or, when Z is a group represented by the following formula (a), it optionally shows a single bond together with R2 to form a fluorene ring together with ring B;
• ring A optionally further has, in addition to R1, QRa in the number of k, and C(X)(Y)Z, substituent(s) selected from the group consisting of a halogen atom, a C1-6 alkyl group optionally substituted by one or more halogen atoms, and a C1-6 alkoxy group optionally substituted by one or more halogen atoms;
• X is a hydrogen atom or a phenyl group;
• Y is a hydroxyl group or an —NHR group (R is a hydrogen atom, an alkyl group or an aralkyl group);
• and
• Z is a hydrogen atom or a group represented by the formula (a):
• wherein * shows a bonding position;
• m is an integer of 0-4;
• Q in the number of m are as defined above;
• Rb in the number of m are each independently an organic group having at least one aliphatic hydrocarbon group having one or more branched chains, a total number of the branched chain of not less than 3 and a total carbon number of not less than 14 and not more than 300;
• R2 is a hydrogen atom, or optionally shows a single bond together with R1 to form a fluorene ring together with ring A;
• and
• ring B optionally further has, in addition to QRb in the number of m, and R2, substituent(s) selected from the group consisting of a halogen atom, a C1-6 alkyl group optionally substituted by one or more halogen atoms, and a C1-6 alkoxy group optionally substituted by one or more halogen atoms);
• the organic group having at least one aliphatic hydrocarbon group having one or more branched chains, a total number of the branched chain of not less than 3 and a total carbon number of not less than 14 and not more than 300 for the above-mentioned Ra and Rb is a group having 3 or more the same or different divalent groups, which is represented by the formula (b):
• wherein * shows a bonding position with the adjacent atom;
• R3 and R4 are each independently a hydrogen atom or a C1-4 alkyl group;
• X1 is a single bond, a C1-4 alkylene group or an oxygen atom,
• provided that R3 and R4 are not hydrogen atoms at the same time.