PREPARATIONS OF PLATINUM COMPLEXES

Abstract

Preparation containing: (A) 30 to 90% by weight of at least one organic solvent; (B) 10 to 70% by weight of at least one platinum complex of the type [L1L2Pt[O(CO)R1]X].sub.n, wherein L1 and L2 represent the same or different monoolefin ligands, or together represent a compound L1L2 acting as a diolefin ligand, wherein X is selected from bromide, chloride, iodide, and —O(CO)R2, wherein —O(CO)R1 and —O(CO)R2 represent the same or different C6-C18 non-aromatic monocarboxylic acid groups, or together represent a C8-C18 non-aromatic dicarboxylic acid group —O(CO)R1 R2(CO)O—, wherein they are mononuclear platinum complexes with n=1, or wherein, if L1L2 and/or —O(CO)R1 R2(CO)O— are present, they may be polynuclear platinum complexes with a whole number n>1, and (C) 0 to 10% by weight of at least one additive.

Claims

1-16. (canceled)

17. A preparation consisting of: (A) 30 to 90% by weight of at least one organic solvent; (B) 10 to 70% by weight of at least one platinum complex of the type [L1L2Pt[O(CO)R1]X].sub.n, wherein L1 and L2 represent the same or different monoolefin ligands, or together represent a compound L1L2 acting as a diolefin ligand, wherein X is selected from bromide, chloride, iodide, and —O(CO)R2, wherein —O(CO)R1 and —O(CO)R2 represent the same or different C6-C18 or C8-C18 non-aromatic monocarboxylic acid groups, or together represent a C8-C18 non-aromatic dicarboxylic acid group —O(CO)R1R2(CO)O—, wherein they are mononuclear platinum complexes with n=1, or wherein, if L1L2 and/or —O(CO)R1R2(CO)O— are present, they may be polynuclear platinum complexes with a whole number n>1, and (C) 0 to 10% by weight of at least one additive.

18. The preparation according to claim 17, wherein L1L2 represents a compound acting as a diolefin ligand, wherein X is selected from bromide, chloride, iodide, and —O(CO)R2, wherein —O(CO)R1 and —O(CO)R2 represent the same or different C6-C18 or C8-C18 non-aromatic monocarboxylic acid groups, and wherein they are mononuclear platinum complexes with n=1, or polynuclear platinum complexes with a whole number n>1.

19. The preparation according to claim 17, wherein whole number n>1 is in the range of 2 to 5.

20. The preparation according to claim 17 in the form of a non-colloidal organic solution.

21. The preparation according to claim 17, having a platinum content originating from the at least one platinum complex in the range of 2.5 to 25% by weight.

22. The preparation according to claim 17, wherein the at least one platinum complex has the formula [(COD)Pt[O(CO)R1].sub.2].sub.n or [(NBD)Pt[O(CO)R1].sub.2].sub.n, wherein n is 1 or 2, and wherein R1 stands for a C5-C17 or C7-C17 non-aromatic hydrocarbon group.

23. The preparation according to claim 17, wherein the decomposition temperature of the at least one platinum complex is in the range of 150 to 200 or 150 to 250° C.

24. The preparation according to claim 17, wherein the at least one additive (C) is selected from the group consisting of wetting additives, rheological additives, defoamers, deaerators, additives for influencing the surface tension and odorants.

25. A method for producing a platinum layer on a substrate, comprising the steps of: (1) applying a coating layer of a preparation according to claim 17 to a substrate, and (2) thermally decomposing the coating layer to form a platinum layer.

26. The method according to claim 25, wherein the substrate comprises one or more materials selected from the group consisting of glass, ceramic, semiconductor substrates, metal, plastic, modified or unmodified polymers of natural origin, carbon substrates, card and paper.

27. The method according to claim 25, wherein the substrate is provided with the coating layer on inner and/or outer surfaces or on inner and/or outer surface portions.

28. The method according to claim 25, wherein the application method used to produce the coating layer is selected from the group consisting of dipping, spray application, printing, application by means of paintbrush, application by means of brush, application by means of felt, and application by means of cloth.

29. The method according to claim 25, wherein the coating layer applied in step (1) is initially dried and in the process partially or completely freed of the organic solvent before it is subjected to thermal decomposition in step (2).

30. The method according to claim 25, wherein the thermal decomposition according to step (2) takes place by thermal treatment, which comprises heating to an object temperature above the decomposition temperature of the at least one platinum complex.

31. The method according to claim 30, wherein the heating to the object temperature takes place in a kiln and/or by infrared irradiation.

32. The method according to claim 25, wherein the platinum layer is 50 nm to 5 μm thick.

Description

EXAMPLES

Example 1 (Provision of a Glass Slide with a Platinum Layer)

[0056] A solution of 65 mmol (COD)PtCl.sub.2 in 100 ml dichloromethane was stirred, and a solution of 260 mmol sodium-2-isodecanoate in 500 ml water was added. The two-phase mixture was emulsified for 24 h at 20° C. by vigorous stirring. The dichloromethane phase turned yellow in the process.

[0057] The dichloromethane phase was separated, and the solvent was distilled off. The viscous, yellow residue was absorbed into 150 ml petroleum benzine (40-60), and the solution was dried with magnesium sulfate and filtered. The petroleum benzine was then completely distilled off. A viscous yellow residue of (COD)Pt[O(CO)(CH.sub.2).sub.5C(CH.sub.3).sub.3].sub.2 remained.

[0058] 10 g of the yellow residue were dissolved in 20 g of a solvent/additive mixture (50% by weight of ethanol, 49.9% by weight of propylene glycol monopropyl ether, 0.1% by weight of BYK-333 (surface additive from BYK). The solution containing 10% by weight platinum was sprayed onto a glass slide by means of an airbrush spray gun. The coated glass slide was heated in a laboratory kiln to an object temperature of 200° C. and kept at this temperature for 15 minutes. A glossy electrically conductive layer of platinum had formed on the slide.

Examples 2a to 2d (Provision of Aluminum Oxide Plates with a Platinum Layer)

[0059] 2a: An unglazed plate of aluminum oxide (50 mm×50 mm) was immersed in the solution from example 1 and, after being removed, was heated in a laboratory kiln to an object temperature of 200° C. and kept at this temperature for 15 minutes. A glossy electrically conductive layer of platinum had formed on the plate.

[0060] 2b: Experiment 2a was repeated at an object temperature of 900° C., obtaining a comparable result.

[0061] 2c and 2d: Experiments 2a and 2b were repeated with a glazed plate of aluminum oxide, giving comparable results but here, in contrast to the result of experiments 2a and 2b, in the form of reflective electrically conductive layers of platinum.

Example 3 (Provision of a Polyurethane Tube with a Platinum Layer)

[0062] A 5 mm thick tube made of polyurethane was drawn three times in succession through a piece of felt impregnated with the solution from example 1. The tube thus coated was heated in a laboratory kiln to an object temperature of 175° C. and kept at this temperature for 5 minutes. A glossy electrically conductive layer of platinum had formed on the tube.

Example 4 (Provision of a Polyimide Film with a Patterned Platinum Layer)

[0063] A Kapton® film (polyimide) was printed with the solution from example 1 with the aid of an inkjet printer at a resolution of 1270 dpi in a meander design. The film thus printed was heated in a laboratory kiln to an object temperature of 200° C. and kept at this temperature for 5 minutes. A glossy electrically conductive layer of platinum in the shape of the meander design, having a width of the conductor tracks of 2.5 mm, had formed on the film.

Example 5 (Provision of a Glass Slide with a Platinum Layer)

[0064] Analogously to example 1, 32.5 mmol (COD)PtCl.sub.2 in 100 ml dichloromethane were reacted with 130 mmol sodium cyclohexanoate in 200 ml water. This gave a yellow residue of (COD)Pt[O(CO)C.sub.6H.sub.11].sub.2.

[0065] 2 g of the yellow residue were dissolved in 4.86 g of dipropylene glycol monopropyl ether. A glass slide was immersed in this solution containing 10% by weight platinum and, after being removed, was heated in a laboratory kiln to an object temperature of 200° C. and kept at this temperature for 15 minutes. A glossy electrically conductive layer of platinum had formed on the slide.

Example 6 (Provision of a Polyimide Film with a Platinum Layer)

[0066] Analogously to example 1, 65 mmol (COD)PtCl.sub.2 in 100 ml dichloromethane were reacted with 260 mmol sodium-2-ethylhexanoate in 500 ml water. A yellow residue of (COD)Pt[O(CO)CH(C.sub.2H.sub.5)C.sub.4H.sub.9].sub.2 was obtained.

[0067] 10 g of the yellow residue were dissolved in a mixture of 15 g of propylene glycol monopropyl ether and 15 g of ethanol. A 10×40 mm strip of a Kapton® film was immersed in this solution containing 8.2% by weight of platinum and, after being removed, was heated in a laboratory kiln to an object temperature of 200° C. and kept at this temperature for 3 minutes. A glossy electrically conductive layer of platinum had formed on the film.

Example 7 (Provision of a Glazed Aluminum Oxide Plate with a Platinum Layer)

[0068] A glazed plate of aluminum oxide was immersed in the solution from example 6 and, after being removed, was heated in a laboratory kiln to an object temperature of 200° C. and kept at this temperature for 5 minutes. A glossy electrically conductive layer of platinum had formed on the plate.

Example 8 (Provision of a Polyimide Film with a Platinum Layer)

[0069] Analogous to Example 1, 27.3 mmol (NBD)PtCl.sub.2 in 100 ml dichloromethane was reacted with 110 mmol sodium-2-ethylhexanoate in 100 ml water. A yellow residue of (NBD)Pt[O(CO)CH(C.sub.2H.sub.5)C.sub.4H.sub.9].sub.2 was obtained, which was further processed analogously to example 6 to obtain a Kapton® film provided with a glossy electrically conductive layer of platinum.