The present invention provides a dye-donor element for use according to thermal dye sublimation transfer, said dye-donor element comprising a support having thereon a dye layer comprising a polymeric binder and at least one dye, wherein said at least one dye corresponds to the following general formula (I) : wherein :

• X represents N-R or
• R represents NR³R⁴ or the residue of an aromatic coupling compound R-Q wherein Q is a group displaceable by a diazotised amine;
• R¹ represents NR³R⁴, OR¹² or SR¹²;
• R² represents hydrogen, cyano, COR¹³, CO₂R¹³, CONR¹⁴R¹⁵ or SO₂R¹⁶;
• R³ and R⁴ each independently represent hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group or R³ and R⁴ together with the nitrogen atom to which they are attached represent the atoms necessary to complete a ring or R³ and/or R⁴ and one of the Y-substituents together with the atoms to which they are attached represent the necessary atoms to form a 5- or 6- membered, fused-on heterocyclic ring ;
• Y represents a substituent, e.g. SH, OH, an amino group, a halogen, CN, NO₂, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, a thioalkoxy group, a carbamoyl group, a sulfamoyl group, an acylamino group, a sulfonylamino group or a carboxylic ester;
• n represents 0, 1, 2, 3 or 4, the substituents being the same or different when n is greater than 1 or two or more Y substituents can form an annelated ring system;
• R¹², R¹³, R¹⁴ and R¹⁵ each independently represent hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic ring or R¹⁴ and R¹⁵ together with the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered ring or R¹² or R¹³ or R¹⁴ or R¹⁵ together with one of the Y-substituents and the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered fused-on heterocyclic ring;
• R¹⁶ represents hydroxy, an alkoxy group, an aryloxy group, NR¹⁷R¹⁸, an aryl group, an alkyl group, an alkenyl group, an alkynyl group, or R¹⁶ together with one of the Y-substituents and the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered fused-on heterocyclic ring;
• R¹⁷ and R¹⁸ each independently represent hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic ring or R¹⁷ and R¹⁸ together with the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered ring;
• A represents an alkyl group, an alkenyl group, an alkynyl group or an aryl group;
• G represents hydrogen, CN or R¹⁹-C=B;
• Z represents hydrogen, halogen, CN, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an amino group, an alkoxy group, a thioalkoxy group, a sulphone group, or G and Z together with the atoms to which they are attached represent the atoms necessary to form an alicyclic, aromatic or heteroaromatic ring;
• B represents O, N-R²⁰, CR²¹R²²;
• R¹⁹ represents hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an aryloxy group, an alkoxy group, such as methoxy or ethoxy, a alkylthio group, an amino group, an electron withdrawing group, e.g. CN, a halogen, a carboxylic ester, an amide e.g. carboxylamide, a sulphonate, a phosphonate, a carbonyl group, a nitro group or R¹⁹ and R²¹, R²² or R²⁰ together with the atoms to which they are attached represent the necessary atoms to form a ring;
• R²⁰ represents H, CN, NR²³R²⁴, OR²³, OCOR²³, OCO₂R²³, OCONR²³R²⁴, OSO₂R²³, OP(O)(OR²³)(OR²⁴), an alkyl group, an alkenyl group, an alkynyl group or an aryl group;
• R²¹ and R²² independently represent a heterocyclic ring, e.g. thiazolyl, benzothiazolyl, isothiazolyl, benzoisothiazolyl, thienyl, pyridinyl, imidazolyl, benzimidazolyl, pyrazolyl, oxazolyl, thiadiazolyl, triazolyl, quinolyl, isoquinolyl, pyridoisothiazolyl, benzoxazolyl, isoxazolyl, benzoisoxazolyl, pyrrolyl and isothiadiazolyl or an electron withdrawing group. e.g. CN, a carboxylic ester, an amide e.g. carboxylamide, a sulphonate, a phosphonate, a carbonyl group, a nitro group or R²¹ and R²² together with the atoms to which they are attached represent the necessary atoms to form a ring;
• R²³ and R²⁴ independently represent hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic ring e.g. as defined hereinbefore, or R²³ and R²⁴ together with the atoms to which they are attached represent the atoms necessary to form a heterocyclic ring.

4,5-Dihydro-1H-1,2,3-triazoliumverbindungen der Formel (I) in der

R¹ und R²

unabhängig voneinander C₆-C₁₄-Aryl oder einen heterocyclischen Rest mit bis zu 3 Ringen und bis zu 4 Heteroatomen aus der Reihe O, S und N bedeuten,

R³ und R⁴

unabhängig voneinander Wasserstoff, C₁-C₁₂-Alkyl, C₂-C₁₂-Alkenyl, C₄-C₈-Cycloalkyl, C₇-C₁₇-Aralkyl, C₆-C₁₄-Aryl oder Nitril bedeuten oder

R³ und R⁴

gemeinsam eine 2- bis 5-gliedrige C-Brücke bedeuten, die gegebenenfalls von bis zu zwei Sauerstoff- und/oder Stickstoffatomen unterbrochen sein kann und

X^-

ein Anion bedeutet,

Neue 4,5-Dihydro-1H-1,2,3-triazoliumverbindungen entsprechen der Formel (I) mit den Maßgaben, daß wenn R³ und R⁴ jeweils Wasserstoff bedeuten, im Fall von R¹ = 4-Methylphenyl R² nicht für 4-Nitrophenyl, 4-Methoxyphenyl oder Phenyl steht und R¹ und R² nicht beide gleichzeitig für 4-Methylphenyl, 4-Nitrophenyl, 4-Methoxyphenyl oder Phenyl stehen.

The present invention provides a dye-donor element for use according to thermal dye sublimation transfer. The dye-donor element comprises a support having thereon a dye layer comprising a polymeric binder and a dye corresponding to the following general formula (I):

wherein :

Z represents hydrogen or a substituent,

X represents N-R or

R represents NR³R⁴ or the residue of an aromatic coupling compound E-Q wherein Q is a group displaceable by a diazotised amine;

R¹ represents NR³R⁴, OR¹² or SR¹²;

R² represents hydrogen, cyano, COR¹³, CO₂R¹³, CONR¹⁴R¹⁵, SO₂R¹⁶;

R³ and R⁴ each independently represent hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an a heterocyclic group or R³ and R⁴ together with the atoms to which they are attached represent the atoms necessary to complete a ring;

Y represents a substituent;

n represents 0, 1, 2, 3 or 4, the substituents being the same or different when n is greater than 1 or two or more Y substituents can form an annelated ring system;

R¹², R¹³, R¹⁴ and R¹⁵ each independently represent hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic ring or R³ and R⁴ together with the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered ring or R³ and/or R⁴ together with the atoms to which they are attached and one of the Y-substituents represent the necessary atoms to form a 5- or 6- membered, fused-on heterocyclic ring or R¹⁴ and R¹⁵ together with the atoms to which they are attached represent the necessary atoms to form a 5- or 6- membered ring or R¹³ or R¹⁴ or R¹⁵ or R¹⁴ and R¹⁵ together with one of the Y-substituents and the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered fused-on heterocyclic ring;

R¹⁶ represents hydroxy, an alkoxy group, an aryloxy group, NR¹⁷R¹⁸, an aryl group or an alkyl group, an alkenyl group, an alkynyl group, or R¹⁶ together with one of the Y-substituents and the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered fused-on heterocyclic ring;

R¹⁷ and R¹⁸ each independently represent hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic ring or R¹⁷ and R¹⁸ together with the atoms to which they are attached represent the necessary atoms to form a 5- or 6-membered ring.

The present invention further provides a method for making an image using the aforementioned dye donor element.

Die kationischen Triazenfarbstoffe der allgemeinen Formel worin

• B Alkylmercapto, Arylmercapto oder einen Rest der Formel
• R Wasserstoff, einen Alkyl-, Alkenyl-, Acyl-, Cycloalkyl-, Aryl-, Aralkyl-, Amino-, Alkylamino-, Dialkylamino-, Arylamino-, Aralkylamino- oder heterocyclischen Rest und
• R, Wasserstoff, einen Alkyl-, Alkenyl- oder Aralkylrest bedeuten, oder
• R und R, zu einem Heterocyclus verbunden sind,
• R₂, R₃ einen Alkyl-, Alkenyl-, Alkinyl oder Aralkylrest oder einer der Reste R₂ oder R₃ auch Wasserstoff bedeuten, oder
• R₃ mit der o-Stellung von A verbunden ist,
• A einen Arylrest und
• An^(-) ein Anion bedeuten,