申请人:KOBAYASHI Satoshi
公开号:US20100256396A1
公开(公告)日:2010-10-07
An aromatic compound of the following formula (1), (2), (5) or (6),
wherein, Ar
1
and Ar
3
represent a tetra-valent aromatic hydrocarbon group or a tetra-valent heterocyclic group, and Ar
2
, Ar
4
, Ar
5
, Ar
6
and Ar
7
represent a tri-valent aromatic hydrocarbon group or a tri-valent heterocyclic group, A
1
represents —Z
1
—, —Z
2
—Z
3
— or —Z
4
═Z
5
—, wherein Z
1
, Z
2
and Z
3
represent O, S or the like and Z
4
and Z
5
represent N, B, P or the like, X
1
, X
2
, X
3
, X
4
, X
9
, X
10
, X
11
, and X
12
represent a halogen atom or the like.