Metal chelated azo dyestuff for inkjet recording and recording liquid for inkjet and inkjet recording method using same

A metal chelated azo dyestuff for inkjet recording characterized in that its free acid form is represented by the following general formula (1′):

• 105
• (wherein the general formula (1′) represents a compound having at least one or more hydrophilic group per molecule;
• M represents an arbitrary metal;
• A, B and C each independently represents an aromatic ring which may have arbitrary substituents;
• D represents an aromatic ring which may have arbitrary substituents other than azo group;
• m represents an integer of 0 to 1;
• n represents an integer of from 0 to 3;
• p represents an integer of from 0 to 2;
• q represents an integer of from 1 to 3, with the proviso that if there are a plurality of B's, they may be the same or different;
• R1 and R2 each independently represents hydrogen atom or arbitrary substituent;
• and M can take tridentate or higher coordination in which M may take arbitrary ligand-to-metal coordination at arbitrary substituent or bond in the general formula (1) or with arbitrary ligands).

A recording liquid comprising an aqueous medium, i) at least one black metal chelated azo dyestuff the free acid form of which is represented by the following general formula (8) and ii) at least one or more other water soluble dyestuff:

• 106
• (wherein the general formula (8) represents a compound having at least one or more hydrophilic group per molecule;
• M1 represents an arbitrary metal;
• A1, B1 and C1 each independently represents an aromatic ring which may have arbitrary substituents;
• D1 represents an aromatic ring which may have arbitrary substituents other than azo group;
• m1 represents an integer of 0 to 1;
• n1 represents an integer of from 0 to 3;
• p1 represents an integer of from 0 to 2;
• q1 represents an integer of from 0 to 3, with the proviso that if there are a plurality of B1's, they may be the same or different;
• R13 and R14 each independently represents hydrogen atom or arbitrary substituent;
• M1 can take tridentate or higher coordination in which M1 may take arbitrary ligand-to-metal coordination at arbitrary substituent or bond in the general formula (8) or with arbitrary ligands;
• and a metal ion may be further coordinated to A1 and B1, B1 and B1 which are adjacent to each other with an azo group interposed therebetween if there are a plurality of B1's or B1 and C1 in the form of —O-M-O—).

A recording liquid comprising an aqueous medium, i) at least one black metal chelated azo dyestuff the free acid form of which is represented by the following general formula (8′) and ii) at least one or more other water soluble dyestuff:

• 107
• (wherein the general formula (8′) represents a compound having at least one or more hydrophilic group per molecule;
• M1 represents an arbitrary metal;
• A1, B1 and C1 each independently represents an aromatic ring which may have arbitrary substituents;
• D1 represents an aromatic ring which may have arbitrary substituents other than azo group;
• m1 represents an integer of 0 to 1;
• n1 represents an integer of from 0 to 3;
• p1 represents an integer of from 0 to 2;
• q1 represents an integer of from 0 to 3, with the proviso that if there are a plurality of B1's, they may be the same or different;
• R13 and R14 each independently represents hydrogen atom or arbitrary substituent;
• and M1 can take tridentate or higher coordination in which M1 may take arbitrary ligand-to-metal coordination at arbitrary substituent or bond in the general formula (8) or with arbitrary ligands).