| 摘要 |
A dye-donor element for laser-induced thermal dye transfer comprising a support having thereon a dye layer comprising a polymeric binder and an infrared-absorbing material which is different from the dye in the dye layer, and wherein the infrared-absorbing material is a cyanine dye having a solution absorption maximum in methanol of between about 700 nm and 900 nm and having the following formula: <IMAGE> or <IMAGE> wherein: R1 and R2 each independently represents a substituted or unsubstituted alkyl group; R3, R4, R5, R6, R7, and R8 each independently represents hydrogen or a substituted or unsubstituted alkyl group; or any two of said R1, R2, R3, R4, R5, R6, R7 and R8 groups may be joined together, directly or through one or more methyne or methylene groups to complete a substituted or unsubstituted carbocyclic or heterocyclic ring of 5 to 9 members; Z1 and Z2 each independently represents hydrogen or the atoms necessary to complete a unsubstituted or substituted benzene or naphthalene ring; Y1 represents a dialkyl-substituted carbon atom, a vinylene group, an oxygen atom, a sulphur atom, a selenium atom, a nitrogen atom with an R1 or a substituted or unsubstituted aryl group attached, or direct bond between the B-ring vinylene carbon and the carbon at the R4 position; Y2 represents a dialkyl-substituted carbon atom, a vinylene group, an oxygen atom, a sulphur atom, a selenium atom, a nitrogen atom with an R1 or a substituted or unsubstituted aryl group attached, or a direct bond between the B-ring vinylene carbon and the carbon at the R7 position; J represents hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a halogen atom; or a nitrogen atom substituted with an alkyl or aryl group, or the atoms necessary to complete a 5- or 6-membered heterocyclic ring; n and m each independently represents 0, 1 or 2; and X is a monovalent anion.
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