Recording information media comprising chromophores

Claim 2

In a recording medium having a layer for the optical recordation of information and for use with a recording laser providing light of a predetermined frequency, the improvement which comprises said information layer comprising a naphthalocyanine chromophore.

Claim 3

The recording medium of Claim 1, wherein the chromophore is of the structural formula: wherein Y is Si, Ge, Sn, Al, Ga, In or a transition metal; Z is halogen; hydroxy; OR 1 or OSiR 2 R 3 R 4 , wherein R 1 is an alkyl having at least four carbons; aryl having at least 6 carbons; acyl having at least 4 carbons; cycloalkyl having at least four carbons; or a polyether, and wherein R 2 , R 3 and R 4 can be the same or different and are alkyl having from 1 to about 18 carbons; aryl having from 6 to 10 carbons; cycloalkyl having at least 4 carbons; siloxy; or alkoxy having at least 3 carbons; with p representing the number of Z substituents and being either 0, 1 or 2; and wherein the X substituents can be the same or different and are independently selected from halogen; alkyl having at least 4 carbons; aryl having from 6 to 10 carbons; acyl having at least 4 carbons; NR S R 6 ; N0 2 ; OR 7 ; SO - 3 ; or S0 2 NR S R 6 , with R 5 and R 6 being the same or different and being H ; alkyl having from one to about 18 carbons; cycloalkyl having at least 4 carbons; aryl having from 6 to 10 carbons; or with R 5 and R 6 being taken together to form a heterocyclic ring containing the N atom and containing from 4 to 7 members, and where the X substituent is attached to the aromatic ring through the N atom when the substituent is NR 5 R 6 , R 7 is the same as R 1 defined above, and with n and m indicating the number of independently selected X substituents, each n being the same or different and ranging from 0 to 4, and each m being the same or different and ranging from 0 to 2.

Claim 4

The recording medium of Claim 2, wherein Y is S i, Ge, or Sn.

Claim 5

4 . The recording medium of Claim 2, wherein the chromophore has between 0 and 8 X substituents.

Claim 6

The recording medium of Claim 2, wherein the chromophore comprises a sulfonamidonaphthalocyanine.

Claim 7

The recording medium of Claim 2, wherein the chromophore comprises bis-tri-n-hexylsiloxysilicon naphthalocyanine.

Claim 8

The recording medium of Claim 2, wherein the chromophore comprises dichlorosilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 9

The recording medium of Claim 2, wherein the chromophore comprises dihydroxysilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 10

The recording medium of Claim 2, wherein the chromophore comprises bis-tri-n-hexylsiloxysilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 11

The recording medium of Claim 2, wherein the central hetero atom of the naphthalocyanine chromophore is Si.

Claim 12

ll. The recording medium of Claim 2, wherein the naphthalocyanine chromophore is substituted with a sulfonamide, halogen or amine substituent.

Claim 13

The recording medium of Claim 2, wherein the total X substituents in the naphthalocyanine chromophore is from 1 to 2.

Claim 14

The recording medium of Claim 2, wherein the information layer further comprises a film forming polymer.

Claim 15

A compound of the structural formula: wherein Y is Si, Ge, Sn, Al, Ga, In or a six coordinate transition metal; Z is halogen; hydroxy; OR 1 or OSiR 2 R 3 R 4 , wherein R 1 is an alkyl having at least four carbons; aryl having at least 6 carbons; acyl having at least 4 carbons; cycloalkyl having at least four carbons; or a polyether; and wherein R 2 , R 3 and R 4 can be the same or different and are alkyl having from 1 to about 18 carbons; aryl having from 6 to 10 carbons; cycloalkyl having at least 4 carbons; siloxy; or alkoxy having at least 3 carbons; with p representing the number of Z substituents and being either 0, 1 or 2; and wherein the X substituents can be the same or different and are independently selected from halogen; alkyl having at least 4 carbons; aryl having from 6 to 10 carbons; acyl having at least 4 carbons; NR S R 6 ; N0 2 ; OR 7 ; SO3; or SO 2 NR 5 R 6 , with R 5 and R 6 being the same or different and being H; alkyl having from one to about 18 carbons; cycloalkyl having at least 4 carbons; aryl having from 6 to 10 carbons; or R 5 and R 6 being taken together to form a heterocyclic ring containing the N atom and containing from 4 to 7 members, and where the X substituent is attached to the aromatic ring through the N atom when the substituent is NR 5 R 6 , R 7 is the same as R 1 defined above, and with n and m indicating the number of independently selected X substituents, each n being the same or different and ranging from 0 to 4, and each m being the same or different and ranging from 0 to 2, with the proviso that when Z is halogen or hydroxy, the X substituents being, the same or different, are alkyl having from 1 to about 18 carbons, SO 2 NR 8 R 9 , NR 8 R 9 , NR 10 COR 11 , SR 11 or OR 10 , wherein R 8 is H; alkyl having from one to about 18 carbons; or aryl having from 6 to 10 carbons, R 9 is alkyl having from one to 18 carbons; or aryl having from 6 to 10 carbons; or with R 8 and R 9 being taken together to form a heterocyclic ring containing the N atom and containing from 4 to 7 members, and where the X substituent is attached to the aromatic ring through the N atom when the substituent is NR 8 R 9 , R 10 is H; alkyl having from one to about 18 carbons, or aryl having from 6 to 10 carbons, and R11 is alkyl or aryl as defined for R 10 .

Claim 16

A compound of the structural formula: wherein Y is Si, Ge, Sn, Al, Ga, In or a six coordinate transition metal; Z is halogen; hydroxy; OR 1 or OSiR 2 R 3 R 4 , wherein R 1 is an alkyl having at least four carbons; aryl having at least 6 carbons; acyl having at least 4 carbons; cycloalkyl having at least four carbons; or a polyether; and wherein R 2 , R 3 and R 4 can be the same or different and are alkyl having from 1 to about 18 carbons; aryl having from 6 to 10 carbons; cycloalkyl having at least 4 carbons; siloxy; or alkoxy having at least 3 carbons; with p representing the number of Z substituents and being either 0, 1 or 2; and wherein the X substituents can be the same or different and are independently selected from halogen; alkyl having at least 4 carbons; aryl having from 6 to 10 carbons; acyl having at least 4 carbons; NR S R 6 ; N0 2 ; OR 7 ; SO3; or SO 2 NR 5 R 6 , with R 5 and R 6 being the same or different and being H; alkyl having from one to about 18 carbons; cycloalkyl having at least 4 carbons; aryl having from 6 to 10 carbons; or R 5 and R 6 being taken together to form a heterocyclic ring containing the N atom and containing from 4 to 7 members, and where the X substituent is attached to the aromatic ring through the N atom when the substituent is NR 5 R 6 , R 7 is the same as R 1 defined above, and with n and m indicating the number of independently selected X substituents, each n being the same or different and ranging from 0 to 4, and each m being the same or different and ranging from 0 to 2, with the proviso that when Z is halogen or hydroxy, the X substituents being, the same or different, are alkyl having from 1 to about 18 carbons, SO 2 NR 8 R 9 , NR 8 R 9 , NR 10 COR 11 , SR 11 or OR 10 , wherein R 8 is H; alkyl having from one to about 18 carbons; or aryl having from 6 to 10 carbons, R 9 is alkyl having from one to 18 carbons; or aryl having from 6 to 10 carbons; or with R 8 and R 9 being taken together to form a heterocyclic ring containing the N atom and containing from 4 to 7 members, and where the X substituent is attached to the aromatic ring through the N atom when the substituent is NR 8 R 9 , R 10 is H; alkyl having from one to about 18 carbons, or aryl having from 6 to 10 carbons, and R11 is alkyl or aryl as defined for R 10 .

Claim 17

The compound of Claim 14, wherein Y is Si, Ge or Sn.

Claim 18

The compound of Claim 14, wherein the number of X substituents ranges from 0 to 8.

Claim 19

Dichlorosilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 20

Dichlorosilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 21

Dihydroxysilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 22

Dihydroxysilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 23

Bis-tri-n-hexylsiloxysilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 24

Bis-tri-n-hexylsiloxysilicon poly-di-n-octylsulfonamidonaphthalocyanine.

Claim 25

A readable information disk comprising a relatively thick and thermally stable substrate and having coated thereon a layer comprising an information track comprised of a succession of spaced pits, said layer being comprised of the naphthalocyanine chromophore of Claim 2.

Claim 26

A method of recording information in a thin film deposited on a relatively thick substrate by irradiating the film with a laser beam in accordance with the said information to form pits in the film, the improvement which comprises said film being comprised of the naphthalocyanine chromophore of Claim 2.

Claim 27

An erasable information medium comprising a thermally stable substrate having coated thereon a layer comprising a naphthalocyanine chromophore.

Claim 28

An erasable information medium comprising a thermally stable substrate having coated thereon a layer comprising a naphthalocyanine chromophore.