A cyanine compound of formula (I), an optical filter containing the cyanine compound, and an optical recording material containing the cyanine compound which is used to form an optical recording layer of an optical recording medium:
1
wherein ring A represents benzene or naphthalene; R
1
and R
2
each represent hydrogen, halogen, nitro, cyano, C1-C8 alkyl, C1-C8 alkoxy or C6-C30 aryl; R
3
represents hydrogen, C1-C8 alkyl or C6-C30 aryl; X represents oxygen, sulfur, selenium, —CR
4
R
5
—, —NH— or —NY′—; Y
1
and Y
2
each represent hydrogen or C1-C30 organic group; R
4
and R
5
each represent C1-C4 alkyl or benzyl, or R
4
and R
5
are taken together to form C3-C6 cycloalkane-1,1-diyl; and Y′ represents C1-C30 organic group.
公式(I)的青菁化合物,含有该青菁化合物的光学滤光片,以及用于形成光学记录介质的光学记录层的青菁化合物光学记录材料:其中,环A代表苯或
萘;R1和R2分别代表氢、卤素、硝基、
氰基、C1-C8烷基、C1-C8烷氧基或C6-C30芳基;R3代表氢、C1-C8烷基或C6-C30芳基;X代表氧、
硫、
硒、-CR4R5-、-NH-或-NY′-;Y1和Y2分别代表氢或C1-C30有机基团;R4和R5分别代表C1-C4烷基或苄基,或R4和R5相互连接形成C3-C6环烷-1,1-二基;Y′代表C1-C30有机基团。