申请人:Hasegawa Waka
公开号:US20090293765A1
公开(公告)日:2009-12-03
A dye compound represented by the following formula has at least one anionic group:
wherein R
1
and R
2
independently represent an amino or hydroxyl group, A
1
represents nitrogen or CR
4
, R
4
and R
3
form a first aromatic ring, R
3
represents a substituent with a negative Hammett's substituent constant when A
1
represents nitrogen, and Cy represents a second aromatic ring.