Near infrared absorbers and display/recording materials using the same

Claim 2

A near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR68## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 3

The near infrared absorber of claim 1, wherein each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is a combination of the branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 4

The near infrared absorber of claim 1, wherein each group represented by A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

Claim 5

An optical recording medium, comprising a recording layer which comprises a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR69## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 6

An optical recording medium, comprising a recording layer which comprises a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR69## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 7

The optical recording medium of claim 4, wherein each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is a combination of the branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 8

The optical recording medium of claim 4, wherein each group represented by A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

Claim 9

A liquid crystal element comprising a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR70## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 10

A liquid crystal element comprising a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR70## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 11

The liquid crystal element of claim 7, wherein each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is a combination of the branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 12

The liquid crystal element of claim 7, wherein each group represented by A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

Claim 13

A near infrared absorption filter comprising a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR71## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 14

A near infrared absorption filter comprising a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR71## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 15

The filter of claim 10, wherein each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is a combination of the branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 16

The filter of claim 10, wherein each group represented by A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

Claim 17

An optical card, comprising a recording layer which comprises a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR72## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 18

An optical card, comprising a recording layer which comprises a near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) ##STR72## wherein each of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 8 carbon atoms, or a branched or cyclic alkoxy group having 4 to 9 carbon atoms, provided that each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is not a pair of hydrogen atoms or alkyl groups simultaneously, or the combination of an alkyl group and a hydrogen atom; each of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently a hydrogen atom, a halogen atom, a nitro group, a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms or a cyclic alkoxy group having 6 to 10 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 1 to 10 carbon atoms or an arylthio group having 6 to 20 carbon atoms; each pair of A 1 and A 2 , A 3 and A 4 , A 5 and A 6 , and A 7 and A 8 may be bound together so as to form a ring; provided that when all of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 are hydrogen atoms, and when each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is the combination of a hydrogen atom and an alkoxy group, said alkoxy group has 4 to 9 carbon atoms and is branched or cyclic; and Met represents two hydrogen atoms, a divalent metal atom, a trivalent or tetravalent substituted metal atom, or an oxymetal group.

Claim 19

The card of claim 13, wherein each pair of Y 1 and Y 2 , Y 3 and Y 4 , Y 5 and Y 6 , and Y 7 and Y 8 is a combination of the branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 20

The card of claim 13, wherein each group represented by A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 and A 8 is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.