Optical information-recording medium, novel oxonol compound and method of recording information

Abstract

An optical information-recording medium which contains a dye having at least two chromophores bonded to each other without any conjugated bond intervening between those chromophores.

1 - 17 . (canceled)  
     
     
         18 . An optical information-recording medium, comprising a dye having at least two chromophores bonded to each other without any conjugated bond intervening between said chromophores, 
 characterised in that said dye is represented by the following formula (1):                          wherein Dye 11 , Dye  12  and Dye 2K  each independently represents an oxonol dye residue having a chromophore, L 11  and L 2K  each independently represent a divalent linkage group forming no π-conjugated system between chromophores linked thereby, n represents an integer of 0 to 10, k represents all integers in the 0 to n range, Q represents an ion neutralizing electric charge, and y is a number required for neutralization of electric charge.    
     
     
         19 . An optical information-recording medium as described in  claim 18 , having a thickness of 1.2±0.2 mm and comprising two laminates each containing a recording layer including the dye, in which the two laminates are bonded to each other so that each of the recording layers is inside, 
 wherein each of the laminates includes:    a transparent disk-shape substrate having a pregroove formed with a track pitch of 0.6 to 0.9 μm and measuring one of 120±3 mm and 80±3 mm in diameter and 0.6±0.1 mm in thickness; and    the recording layer provided on the pregroove-formed side of the transparent disk-shape substrate.    
     
     
         20 . An optical information-recording medium as described in  claim 18 , having a thickness of 1.2±0.2 mm, 
 the optical information-recording medium comprising:    a laminate containing a recording layer including the dye; and    a disk-shape protective plate;    in which the laminate and the disk-shape protective plate are bonded to each other so that the recording layer is inside,    wherein the laminate includes:    a transparent disk-shape substrate having a pregroove formed with a track pitch of 0.6 to 0.9 μm and measuring one of 120±3 mm and 80±3 mm in diameter and 0.6±0.1 mm in thickness; and    the recording layer provided on the pregroove-formed side of the transparent disk-shape substrate.    
     
     
         21 . An optical information-recording medium as described in  claim 18 , wherein the dye is represented by the following formula (6):  
       
         
           
           
               
               
           
         
         wherein Za 21 , Za 22 , Za 23  and Za 24  each independently represent atoms forming an acidic nucleus, Ma 21 , Ma 22 , Ma 23 , Ma 24 , Ma 25  and Ma 26  each independently represent a substituted or unsubstituted methine group, L 11  is a divalent linkage group forming no π-conjugated system together with its two bonds, Ka 21  and Ka 22  each independently represent an integer of 0 to 3, and Q represents a univalent cation for neutralizing electric charge, or 2Q represents a divalent cation; and Ma 21 s, Ma 22 S, Ma 25 s and Ma 26 S present in a case where Ka 21  and Ka 22  are each 2 or 3 may be the same or different.  
       
     
     
         22 . An optical information-recording medium as described in  claim 18 , wherein the dye is represented by the following formula (2):  
       
         
           
           
               
               
           
         
         wherein R 11 , R 12 , R 13  and R 14  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, R 21 , R 22  and R 3  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heterocyclic group, a halogen atom, a carboxyl group, a substituted or unsubstituted alkoxycarbonyl group, a cyano group, a substituted or unsubstituted acyl group, a substituted or unsubstituted carbamoyl group, an amino group, a substituted amino group, a sulfo group, a hydroxyl group, a nitro group, a substituted or unsubstituted alkylsulfonylamino group, a substituted or unsubstituted arylsulfonylamino group, a substituted or unsubstituted carbamoylamino group, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, a substituted or unsubstituted alkylsulfinyl group, a substituted or unsubstituted arylsulfinyl group or a substituted or unsubstituted sulfamoyl group, m represents an integer of 0 to 5, R 3 s may be the same or different when m is 2 to 5, Z x+  represents a cation, and x represents an integer of 1 or more.  
       
     
     
         23 . An optical information-recording medium as described in  claim 18 , wherein the oxonol dye residue is formed from a compound represented by formula (5):  
       
         
           
           
               
               
           
         
         by removing a hydrogen atom from any of Za 5 , Za 6 , and Ma 12  to Ma 14 , and wherein Za 5  and Za 6  each independently represent atoms forming an acidic nucleus, Ma 12 , Ma 13 , and Ma 14  each independently represent a substituted or unsubstituted methine group, Ka 3  represents an integer of 0 to 3, Qy represents an ion neutralizing electric charge with y the number required for the electric charge; and in a case where Ka 3  is 2 or 3, Ma 12  and Ma 13  may be the same or different.  
       
     
     
         24 . An optical information-recording medium, comprising a dye having at least two chromophores bonded to each other without any conjugated bond intervening between said chromophores, 
 characterised in that said dye is represented by the following formula (6):                          wherein Za 21 , Za 22  Za 23  and Za 24  each independently represent atoms forming an acidic nucleus, Ma 21 , Ma 22 , Ma 23 , Ma 24 , Ma 25  and Ma 26  each independently represent a substituted or unsubstituted methine group, L 11  is a divalent linkage group forming no π-conjugated system together with its two bonds, Ka 21  and Ka 22  each independently represent an integer of 0 to 3, and Q represents a univalent cation for neutralizing electric charge, or 2Q represents a divalent cation; and Ma 21 s, Ma 22 s, Ma 25 s and Ma 26 s present in a case where Ka 21  and Ka 22  are each 2 or 3 may be the same or different.    
     
     
         25 . An optical information-recording medium, comprising a dye having at least two chromophores bonded to each other without any conjugated bond intervening between said chromophores, 
 characterised in that said dye is represented by the following formula (2):                          wherein R 11 , R 12 , R 13  and R 14  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, R 21 , R 22  and R 3  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heterocyclic group, a halogen atom, a carboxyl group, a substituted or unsubstituted alkoxycarbonyl group, a cyano group, a substituted or unsubstituted acyl group, a substituted or unsubstituted carbamoyl group, an amino group, a substituted amino group, a sulfo group, a hydroxyl group, a nitro group, a substituted or unsubstituted alkylsulfonylamino group, a substituted or unsubstituted arylsulfonylamino group, a substituted or unsubstituted carbamoylamino group, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, a substituted or unsubstituted alkylsulfinyl group, a substituted or unsubstituted arylsulfinyl group or a substituted or unsubstituted sulfamoyl group, m represents an integer of 0 or more, R 3 s may be the same or different when m is 2 or more, Z X+  represents a cation, and x represents an integer of 1 or more.    
     
     
         26 . An optical information-recording medium as described in  claim 24  or  claim 25 , having a thickness of 1.2±0.2 mm and comprising two laminates each containing a recording layer including the dye, in which the two laminates are bonded to each other so that each of the recording layers is inside, 
 wherein each of the laminates includes:    a transparent disk-shape substrate having a pregroove formed with a track pitch of 0.6 to 0.9 μm and measuring one of 120±3 mm and 80±3 mm in diameter and 0.6±0.1 mm in thickness; and    the recording layer provided on the pregroove-formed side of the transparent disk-shape substrate.    
     
     
         27 . An optical information-recording medium as described in  claim 24  or  claim 25 , having a thickness of 1.2±0.2 mm, 
 the optical information-recording medium comprising:    a laminate containing a recording layer including the dye; and    a disk-shape protective plate;    in which the laminate and the disk-shape protective plate are bonded to each other so that the recording layer is inside,    wherein the laminate includes:    a transparent disk-shape substrate having a pregroove formed with a track pitch of 0.6 to 0.9 μm and measuring one of 120±3 mm and 80±3 mm in diameter and 0.6±0.1 mm in thickness; and    the recording layer provided on the pregroove-formed side of the transparent disk-shape substrate.    
     
     
         28 . An optical information-recording medium, according to  claim 24 , wherein said dye is represented by the following formula (2):  
       
         
           
           
               
               
           
         
         wherein R 11 , R 12 , R 13  and R 14  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, R 21 , R 22  and R 3  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heterocyclic group, a halogen atom, a carboxyl group, a substituted or unsubstituted alkoxycarbonyl group, a cyano group, a substituted or unsubstituted acyl group, a substituted or unsubstituted carbamoyl group, an amino group, a substituted amino group, a sulfo group, a hydroxyl group, a nitro group, a substituted or unsubstituted alkylsulfonylamino group, a substituted or unsubstituted arylsulfonylamino group, a substituted or unsubstituted carbamoylamino group, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, a substituted or unsubstituted alkylsulfinyl group, a substituted or unsubstituted arylsulfinyl group or a substituted or unsubstituted sulfamoyl group, m represents the integer 0, Z X+  represents a cation, and x represents an integer of 1 or more.  
       
     
     
         29 . An oxonol compound represented by the following formula (2):  
       
         
           
           
               
               
           
         
         wherein R 11 , R 12 , R 13  and R 14  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, R 21 , R 22  and R 3  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heterocyclic group, a halogen atom, a carboxyl group, a substituted or unsubstituted alkoxycarbonyl group, a cyano group, a substituted or unsubstituted acyl group, a substituted or unsubstituted carbamoyl group, an amino group, a substituted amino group, a sulfo group, a hydroxyl group, a nitro group, a substituted or unsubstituted alkylsulfonylamino group, a substituted or unsubstituted arylsulfonylamino group, a substituted or unsubstituted carbamoylamino group, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, a substituted or unsubstituted alkylsulfinyl group, a substituted or unsubstituted arylsulfinyl group or a substituted or unsubstituted sulfamoyl group, m represents an integer of 0 or more, R 3 s may be the same or different when m is 2 or more, Z X+  represents a cation, and x represents an integer of 1 or more.  
       
     
     
         30 . A method of recording information comprising recording information on an optical information-recording medium according to  claim 18 , by irradiation with laser light having a wavelength of 600 to 700 nm.