Near infrared absorbers and display/recording materials prepared by using same

Claim 2

A near infrared absorber having a molecular extinction coefficient of at least 200,000 and represented by the formula (I) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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 group represented by Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is a hydrogen atom, a branched or cyclic alkoxyl group having 4 to 9 carbon atoms or a straight-chain or branched alkyl group having 1 to 8 carbon atoms.

Claim 4

The near infrared absorber of Claim 1, wherein each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of straight-chain, branched or cyclic different alkoxy groups having 4 to 9 carbon atoms.

Claim 5

The near infrared absorber of Claim 1, wherein each group represented by A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

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 repersented by the formula (I) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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

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 repersented by the formula (I) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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 8

The optical recording medium of Claim 5, wherein each group represented by Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is a hydrogen atom, a branched or cyclic alkoxyl group having 4 to 9 carbon atoms, or a straight-chain or branched alkyl group having 1 to 8 carbon atoms.

Claim 9

The optical recording medium of Claim 5, wherein each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of straight-chain, branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 10

The optical recording medium of Claim 5, wherein each group represented by A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

Claim 11

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) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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 12

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) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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 13

The liquid crystal element of Claim 9, wherein each group represented by Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is a hydrogen atom, a branched or cyclic alkoxyl group having 4 to 9 carbon atoms, or a straight-chain or branched alkyl group having 1 to 8 carbon atoms.

Claim 14

The liquid crystal element of Claim 9, wherein each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of straight-chain, branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 15

The liquid crystal element of Claim 9, wherein each group represented by A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

Claim 16

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) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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 17

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) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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

The filter of Claim 13, wherein each group represented by Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is a hydrogen atom, a branched or cyclic alkoxyl group having 4 to 9 carbon atoms, or a straight-chain or branched alkyl group having 1 to 8 carbon atoms.

Claim 19

The filter of Claim 13, wherein each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of straight-chain, branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 20

The filter of Claim 13, wherein each group represented by A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.

Claim 21

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) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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 22

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) wherein each of Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 15 carbon atoms, a straight-chain, branched or cyclic alkoxyl group having 4 to 15 carbon atoms, a straight-chain, branched or cyclic alkylthio group having 4 to 15 carbon atoms; provided that each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is not a pair of hydrogen atoms, alkyl groups or alkylthio groups simultaneously, or a combination of an alkyl group and a hydrogen atom; each of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ 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 1 to 10 carbon atoms, an alkynyl group having 1 to 10 carbon atoms, a straight-chain or branched alkoxyl group having 1 to 4 carbon atoms or a cyclic alkoxyl 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 A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may be bound together so as to form a ring; provided that when all of A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ are hydrogen atoms and each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, Y⁷ and Y⁸ is a combination of a hydrogen atom and an alkoxyl group, said alkoxyl 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 23

The card of Claim 17, wherein each group represented by Y¹, Y², Y³, Y⁴, Y⁵, Y⁶, Y⁷ and Y⁸ is a hydrogen atom, a branched or cyclic alkoxyl group having 4 to 9 carbon atoms, or a straight-chain or branched alkyl group having 1 to 8 carbon atoms.

Claim 24

The card of Claim 17, wherein each pair of Y¹ and Y², Y³ and Y⁴, Y⁵ and Y⁶, and Y⁷ and Y⁸ is a combination of straight-chain, branched or cyclic different alkoxyl groups having 4 to 9 carbon atoms.

Claim 25

The card of Claim 17, wherein each group represented by A¹, A², A³, A⁴, A⁵, A⁶, A⁷ and A⁸ is independently an alkyl group having 1 to 6 carbon atoms or an arylthio group having 6 to 10 carbon atoms.