| 摘要 |
-i- INFRARED ABSORBING TRINUCLEAR CYANINE DYES FOR DYE DONOR ELEMENT USED IN LASER INDUCED THERMAL DYE TRANSFER A dye-donor element for laser-induced thermal dye transfer comprising a support having thereon a dye layer and an infrared absorbing material which is different from the dye in the dye layer, and wherein the infrared-absorbing material is a trinuclear cyanine dye which is located in the dye layer. In a preferred embodiment, the trinuclear cyanine dye has the following formula: wherein: R1 , R2 and R3 each independently represents a substituted or unsubstituted alkyl or cycloalkyl group having from 1 to about 6 carbon atoms or an aryl or hetaryl group having from about 5 to about 10 atoms; R4 R5 R6 R7 and R8 each independently represents hydrogen, halogen, cyano, alkoxy, aryloxy, acyloxy, aryloxycarbonyl, alkoxycarbonyl, sulfonyl, carbamoyl, acyl, acylamido, alkylamino, arylamino or a substituted or unsubstituted alkyl, aryl or hetaryl group; or any of said R4, R5, R6, R7 and R8 groups may be combined with R1, R2 or R3 or with each other to form a 5- to -ii-7-membered substituted or unsubstituted carbocyclic or heterocyclic ring; J is NR1, O or S; Z1 and Z2 each independently represents hydrogen, R1 or the atoms necessary to form a 5- to 7-membered substituted or unsubstituted carbocyclic or heterocyclic ring; Y1 and Y2 each independently represents a dialkyl-substituted carbon atom, a vinylene group, an oxygen atom, a sulfur atom, a selenium atom, a tellurium atom, NR1, or a direct bond to the carbon at the R5 or R7 position; m and n are each independently 0 to 3, with the proviso that n+m is at least 3; and X is a monovalent anionic group isolated or covalently attached to any of said R1, R2, R3, R4, R5, R6, R7, R8. Z1 or Z2 groups.
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