Thermal transfer recording sheet

A thermal transfer recording sheet comprising:

• a substrate;
• a yellow dye layer containing a yellow dye;
• a magenta dye layer containing a magenta dye;
• a cyan dye layer containing a cyan dye;
• and
• a protective layer for protecting a surface of an image formed by transferring the yellow dye layer, the magenta dye layer, and the cyan dye layer onto a transfer target material,
• wherein the protective layer contains one or more compounds selected from the group consisting of compounds represented by general formulae (1) and (2),
• wherein the yellow dye contains one or more compounds selected from the group consisting of compounds represented by general formulae (3) to (6), and
• wherein the cyan dye contains one or more compounds selected from the group of consisting compounds represented by general formulae (7) to (9):
• wherein, in the general formula (1), R1 to R8 each independently represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkynyl group, or a substituted or unsubstituted aryl group, and R1 and R2, R3 and R4, R5 and R6, and R7 and R8 may each be bonded to each other to form a ring, and X− represents an anion;
• wherein, in the general formula (2), R′1 to R′8 each independently represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkynyl group, or a substituted or unsubstituted aryl group, and R′1 and R′2, R′3 and R′4, R′5 and R′6, and R′7 and R′8 may each be bonded to each other to form a ring, and X′− represents an anion;
• wherein, in the general formula (3), R9 to R12 each independently represents an alkyl group, or a substituted or unsubstituted aryl group;
• wherein, in the general formula (4), R13 represents an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted amino group, R14 represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or —N(—Ra)Rb, provided that Ra and Rb each independently represents a hydrogen atom, an alkyl group, or an acyl group, and may form a cyclic structure together with a nitrogen atom to which Ra and Rb are bonded, R15 represents an alkyl group, R16 represents a hydrogen atom or an alkyl group, Y represents a carbonyl group or a sulfonyl group, and n represents an integer of from 1 to 3;
• wherein, in the general formula (5), R17 and R18 each independently represents an alkyl group or an aryl group;
• wherein, in the general formula (6), R19 and R20 each independently represents an alkyl group or an aryl group;
• wherein, in the general formula (7), R21 to R25 each independently represents an alkyl group or an aryl group;
• wherein, in the general formula (8), R26 and R27 each independently represents an alkyl group, or a substituted or unsubstituted aryl group;
• and
• wherein, in the general formula (9), R28 to R32 each independently represents an alkyl group or an aryl group.