NOBLE METAL COMPLEXES COMPRISING DIOLEFIN AND C6-C18 MONOCARBOXYLATE LIGANDS FOR SURFACE COATING

Abstract

The invention relates to a noble metal complex comprising diolefin and C6-C18 monocarboxylate ligands of the type [LPd[O(CO)R1]X].sub.n, [LRh[O(CO)R1]].sub.m or [LIr[O(CO)R1]].sub.m, in which L 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 identical or different non-aromatic C6-C18 monocarboxylic acid residues, in each case with the exception of a phenylacetic acid residue, and wherein n is an integer ≥1 and m is an integer ≥2.

Claims

1. A noble metal complex having diolefin and C6-C18 monocarboxylate ligands of the type [LPd[O(CO)R1]X].sub.n, [LRh[O(CO)R1]].sub.m or [LIr[O(CO)R1]].sub.m, wherein L denotes 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 denote identical or different non-aromatic C6-C18 monocarboxylic acid residues, in each case with the exception of a phenylacetic acid residue, and wherein n is an integer ≥1 and m is an integer ≥2.

2. The noble metal complex according to claim 1, wherein integer n>1, and integer m is in the range from 2 to 5.

3. The noble metal complex according to claim 1, in individualized or combined form.

4. A noble metal complex of the type [(COD)Pd[O(CO)R1].sub.2].sub.n, [(NBD)Pd[O(CO)R1].sub.2].sub.n, [(COD)Rh[O(CO)R1]].sub.m, [(NBD)Rh[O(CO)R1]].sub.m, [(COD)Ir[O(CO)R1]].sub.m or [(NBD)Ir[O(CO)R1]].sub.m, wherein n is 1 or 2, wherein m is 2, and wherein R1 represents a non-aromatic C5-C17 hydrocarbon residue, with the exception of benzyl.

5. A method for producing noble metal complexes according to claim 1 via ligand exchange, comprising mixing of a two-phase system, wherein one phase comprises a reactant of the type LPdX.sub.2, [LRhX].sub.2 or [LIrX].sub.2, either as is or as an at least substantially water-immiscible organic solution, with X selected from bromide, chloride, and iodide, and wherein the other phase comprises an aqueous solution of alkali metal and/or magnesium salt of monocarboxylic acids correspondingly selected from R1COOH and optionally R2COOH.

6. A use of one or more noble metal complexes according to claim 1, for producing a layer comprising noble metal on a substrate.

7. The use according to claim 6, wherein the substrate is a temperature-sensitive substrate.

8. The use according to claim 6, comprising the provision of an organic solution of the noble metal complex or complexes, application of the organic solution to a substrate directly or as a component of a preparation comprising at least one further component, and heating of the applied coating to an object temperature above the decomposition temperature of the noble metal complex or complexes.

9. The use according to claim 6, wherein the layer comprising noble metal is a layer comprising palladium metal, rhodium oxide or iridium oxide or consisting thereof.

10. A use of one or more noble metal complexes obtainable by a method according to claim 5, for producing a layer comprising noble metal on a substrate.

Description

EXAMPLES

Example 1, Production of (COD)Pd[O(CO)CH(C.SUB.2.H.SUB.5.)C.SUB.4.H.SUB.9.].SUB.2 .and Use Thereof for Production of a Palladium Layer

[0025] A solution of 35 mmol (COD)PdCl.sub.2 in 200 ml dichloromethane was stirred, and a solution of 140 mmol sodium 2-ethylhexanoate in 150 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.

[0026] The dichloromethane phase was separated, and the solvent was distilled off. The viscous, yellow residue was absorbed into 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)Pd[O(CO)CH(C.sub.2H.sub.5)C.sub.4H.sub.9].sub.2 remained.

[0027] After 10 minutes of heating to 200° C., a specular, 0.5 μm thin layer of palladium could be obtained from a 20 μm thick layer of the (COD)Pd[O(CO)CH(C.sub.2H.sub.5)C.sub.4H.sub.9].sub.2.

Example 2, Production of (NBD)Pd[O(CO)CH(C.SUB.2.H.SUB.5.)C.SUB.4.H.SUB.9.].SUB.2

[0028] Analogously to example 1, 35 mmol (NBD)PdCl.sub.2 in 200 ml dichloromethane were reacted with 140 mmol sodium 2-ethylhexanoate in 150 ml water.

Example 3, Production of [(COD)Rh[O(CO)CH(C.SUB.2.H.SUB.5.)C.SUB.4.H.SUB.9.]].SUB.m

[0029] Analogously to example 1, 16.3 mmol [(COD)RhCl].sub.2 in 200 ml dichloromethane were reacted with 65.3 mmol sodium 2-ethylhexanoate in 100 ml water.

Example 4, Production of [(COD)Ir[O(CO)CH(C.SUB.2.H.SUB.5.)C.SUB.4.H.SUB.9.]].SUB.m

[0030] Analogously to example 1, 16.3 mmol [(COD)IrCl].sub.2 in 200 ml dichloromethane were reacted with 65.3 mmol sodium 2-ethylhexanoate in 100 ml water.

Example 5, Production of (COD)Pd[O(CO)(CH.SUB.2.).SUB.5.C(CH.SUB.3.).SUB.3.].SUB.2

[0031] Analogously to example 1, 35 mmol (COD)PdCl.sub.2 in 200 ml dichloromethane were reacted with 140 mmol sodium neodecanoate in 150 ml water.

Example 6, Production of [(NBD)Rh[O(CO)CH(C.SUB.2.H.SUB.5.)C.SUB.4.H.SUB.9.]].SUB.m

[0032] Analogously to example 1, 16.3 mmol [(NBD)RhCl].sub.2 in 200 ml dichloromethane were reacted with 65.3 mmol sodium 2-ethylhexanoate in 100 ml water.