Core-shell dye, near-infrared absorbing composition including the same, and near-infrared absorbing film

A core-shell dye, consisting of:

• a core represented by Chemical Formula 1;
• and
• a shell surrounding the core and represented by Chemical Formula 2:
• wherein, in Chemical Formula 1,
• each R1 is independently a substituted or unsubstituted C1 to C30 alkyl group, or a substituted or unsubstituted C6 to C30 aryl group;
• each R2 is independently a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 arylalkyl group;
• adjacent two R e s are separate or are linked to each other to form a substituted or unsubstituted C3 to C30 cycloalkyl ring;
• each R3 is independently a substituted or unsubstituted C1 to C30 alkyl group, or a substituted or unsubstituted C6 to C30 aryl group;
• and
• each R4 is independently a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 arylalkyl group;
• adjacent two R4 s are separate or are linked to each other to form a substituted or unsubstituted C3 to C30 cycloalkyl ring;
• wherein, in Chemical Formula 2,
• L1 and L2 are each independently a substituted or unsubstituted C1 to C10 alkylene group;
• Z1 and Z2 are each independently *—CR—* or a nitrogen atom, in which R is a hydrogen atom or a substituted or unsubstituted C1 to C10 alkyl group;
• X1 and X2 are each independently a halogen atom or a substituted or unsubstituted C1 to C10 alkyl group;
• a1 and a2 are independently an integer of 0 to 4;
• and
• n is an integer of 2 or more.