Thermally-transferable fluorescent europium complexes
First Claim
1. A donor element for thermal transfer comprising a support having on one side thereof a fluorescent europium complex dispersed in a polymeric binder, said complex having the formula:
- ##STR41## wherein;
D is a substituted or unsubstituted, aromatic, 5- or 6-membered carbocyclic or heterocyclic moiety; and
J is --CF3, --CH3, --CH2 F or --CHF2.
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Accused Products
Abstract
A donor element for thermal transfer comprising a support having on one side thereof a fluorescent europium complex dispersed in a polymeric binder. In a preferred embodiment, the complex has the formula: ##STR1## wherein: D is a substituted or unsubstituted, aromatic, 5- or 6-membered carbocyclic or heterocyclic moiety; and
J is --CF3, --CH3, --CH2 F or --CHF2.
In another preferred embodiment, the europium atom may also have attached thereto at least one monodentate ligand with an electron-donating oxygen or nitrogen atom or at least one bidentate ligand with two electron-donating oxygen, nitrogen or sulfur atoms atoms capable of forming a 5- or 6-membered ring with the europium atom.
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Citations
17 Claims
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1. A donor element for thermal transfer comprising a support having on one side thereof a fluorescent europium complex dispersed in a polymeric binder, said complex having the formula:
- ##STR41## wherein;
D is a substituted or unsubstituted, aromatic, 5- or 6-membered carbocyclic or heterocyclic moiety; andJ is --CF3, --CH3, --CH2 F or --CHF2. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- ##STR41## wherein;
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8. In a process of forming a transfer image comprising imagewise-heating a donor element comprising a support having on one side thereof a layer comprising a material dispersed in a polymeric binder, and transferring an image to a receiving element to form said transfer image, the improvement wherein said material is a fluorescent europium complex, said complex having the formula:
- ##STR43## wherein;
D is a substituted or unsubstituted, aromatic, 5- or 6-membered carbocyclic or heterocyclic moiety; andJ is --CF3, --CH3, --CH2 F or --CHF2. - View Dependent Claims (9, 10)
- ##STR43## wherein;
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11. In a thermal transfer assemblage comprising:
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(a) a donor element comprising a support having on one side thereof a layer comprising a material dispersed in a polymeric binder, and (b) a receiving element comprising a support having thereon an image-receiving layer, said receiving element being in a superposed relationship with said donor element so that said material layer is in contact with said image-receiving layer, the improvement wherein said material is a fluorescent europium complex, said complex having the formula;
##STR45## wherein;
D is a substituted or unsubstituted, aromatic, 5- or 6-membered carbocyclic or heterocyclic moiety; andJ is --CF3, --CH3, --CH2 F or --CHF2. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification