Inkjet recording sheet

An inkjet recording sheet comprising a support and, on the support, a colorant-receiving layer including:

• (A) at least one compound selected from the group consisting of compounds represented by the following formulas (2) to (4), the compound being substantially water soluble;
• and
• (B) at least one organic mordant selected from the group consisting of polyallylamine, polyvinylamine and derivatives thereof:
• R4—S—S—R5 General Formula (2)
• R3—SH General Formula (3)
• wherein, in formulas (2) to (4), each of R3,R4, R5, R6 and R7 independently represents an optionally substituted alkyl group, an optionally substituted aryl group or an optionally substituted heterocyclic group, and any of pairs R4 and R5, and R6 and R7 may be mutually coupled to form a ring.

An inkjet recording sheet comprising a support and, on the support, a colorant-receiving layer including:

• (A) at least one compound selected from the group consisting of compounds represented by the following formulas (1) to (4), the compound having an I/O value, which is an inorganic/organic ratio in an organic conceptual chart, of not less than 0.5;
• and
• (B) at least one organic mordant selected from the group consisting of polyallylamine, polyvinylamine and derivatives thereof:
• R1—S—R2 General Formula (1)
• R4—S—S—R5 General Formula (2)
• R3—SH General Formula (3)
• wherein, in formulas (1) to (4), each of R1, R2, R3, R4, R5, R6 and R7 independently represents an optionally substituted alkyl group, an optionally substituted aryl group or an optionally substituted heterocyclic group, and any of pairs R1 and R2, R4 and R5, and R6 and R7 may be mutually coupled to form a ring,
• wherein the colorant-receiving layer further comprises at least one compound selected from the group consisting of compounds represented by the following formulas (5), (6) and (7) and compounds including an aliphatic carbon-carbon double bond group:
• wherein:
• in formulas (5) and (6), each of R10, R11, R12 and R13 independently represents a hydrogen atom, an amino group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an acyl group or an alkoxycarbonyl group, and any pair from R10, R11, R12 and R13 may be coupled to each other to form a ring;
• and in formula (7), each of R14 and R15 independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an acyl group or an alkoxycarbonyl group, R16 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a metal or quatemary ammonium, and any pair from R14, R15 and R16 may be coupled to each other to form a ring.

An inkiet recording sheet comprising a support and, on the support, a colorant-receiving layer including:

• (A) at least one compound selected from the group consisting of compounds represented by the following formulas (1) to (4), the compound being substantially water soluble;
• and
• (B) at least one organic mordant selected from the group consisting of polyallylamine, polyvinylamine and derivatives thereof:
• R1—S—R2 General Formula (1)
• R4—S—S—R5 General Formula (2)
• R3—SH General Formula (3)
• wherein, in formulas (1) to (4), each of R1, R2, R3, R4, R5, R6 and R7 independently represents an optionally substituted alkyl group, an optionally substituted aryl group or an optionally substituted heterocyclic group, and any of pairs R1 and R2, R4 and R5, and R6 and R7 may be mutually coupled to form a ring,
• wherein the colorant-receiving layer further comprises at least one compound selected from the group consisting of compounds represented by the following formulas (5), (6) and (7) and compounds including an aliphatic carbon-carbon double bond group:
• wherein:
• in formulas (5) and (6), each of R10, R11, R12 and R13 independently represents a hydrogen atom, an amino group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an acyl group or an alkoxycarbonyl group, and any pair from R10, R11, R12 and R13 may be coupled to each other to form a ring;
• and in formula (7), each of R14 and R15 independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an acyl group or an alkoxycarbonyl group, R16 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a metal or quaternary ammonium, and any pair from R14, R15 and R16 may be coupled to each other to form a ring.

An inkjet recording sheet comprising a support and, on the support, a colorant-receiving layer including at least one compound selected from the group consisting of thioether-based compounds represented by the following formula (8), the compound having an I/O value, which is an inorganic/organic ratio in an organic conceptual chart, of not less than 0.5:

• X—(Y1—S)m—(Y2—S)n—Y3—X General Formula (8)
• wherein, in the formula (8):
• X represents a hydroxyl group, a carboxyl group, a carboxylate, an amino group, or a group including at least one of these groups;
• Y1, Y2 and Y3 each independently represents an alkylene group;
• n represents an integer from 1 to 6;
• and m represents 0 or 1.

An inkjet recording sheet comprising a support and, on the support, a colorant-receiving layer including at least one compound selected from the group consisting of thioether-based compounds represented by the following formula (8), the compound being substantially water soluble:

• X—(Y1—S)m—(Y2—S)n—Y3—X General Formula (8)
• wherein, in the formula (8):
• X represents a hydroxyl group, a carboxyl group, a carboxylate, an amino group, or a group including at least one of these groups;
• Y1, Y2 and Y3 each independently represents an alkylene group;
• n represents an integer from 1 to 6;
• and m represents 0 or 1.