Copper-containing articles

1. A copper-containing article comprising a substrate and having disposed thereon a copper-containing composition comprising a water-soluble complex of a reactive polymer with reducible copper ions or copper nanoparticles, the reactive polymer comprising: (a) greater than 1 mol % of recurring units comprising sulfonic acid or sulfonate groups, (b) at least 5 mol % of recurring units comprising a pendant group capable of crosslinking via [2+2] photocycloaddition, and optionally (c) at least 1 mol % of recurring units comprising a pendant amide, amine, hydroxyl, lactam, phosphonic acid, or carboxylic acid group, all amounts based on the total recurring units in the reactive polymer.

2. The copper-containing article of claim 1 , wherein the reactive polymer comprises:

(i-a) at least 5 mol % and up to and including 50 mol % of the recurring units comprising a pendant group capable of crosslinking via [2+2] photocycloaddition, based on the total recurring units in the reactive polymer,

(i-b) at least 1 mol % and up to and including 93 mol % of recurring units comprising a pendant hydroxyl, amide, or carboxylic acid group, based on the total recurring units in the reactive polymer, or

both (i-a) and (i-b).

3. The copper-containing article of claim 1 , wherein the recurring units comprising a pendant group capable of crosslinking via [2+2] photocycloaddition comprise:

a photosensitive —C(═O)—CR═CR 1 —Y group wherein R and R 1 are independently hydrogen or an alkyl group having 1 to 7 carbon atoms, a 5- to 6-membered cycloalkyl group, an alkoxy group having 1 to 7 carbon atoms, a phenyl group, or a phenoxy group, and Y is an aryl or heteroaryl group;

(ii) a photosensitive, non-aromatic unsaturated carbocyclic group;

(iii) a photosensitive, aromatic or non-aromatic heterocyclic group comprising a carbon-carbon double bond that is conjugated with an electron withdrawing group;

(iv) a photosensitive non-aromatic unsaturated heterocyclic group comprising one or more amide groups that are conjugated with a carbon-carbon double bond, which photosensitive non-aromatic unsaturated heterocyclic group is linked to the water-soluble backbone at an amide nitrogen atom; or

(v) a photosensitive substituted or unsubstituted 1,2-diarylethylene group.

4. The copper-containing article of claim 1 , wherein the substrate has a first supporting side and an opposing second supporting side, and the copper-containing composition is disposed on one or both the first supporting side and the opposing second supporting of the substrate.

5. The copper-containing article of claim 1 , wherein the copper-containing composition is disposed on the substrate in a patternwise fashion.

6. A copper-containing article comprising a substrate and having disposed thereon a water-insoluble composition comprising a crosslinked water-insoluble complex of a crosslinked reacted polymer with reducible copper ions or copper nanoparticles, the crosslinked reacted polymer derived from photoexposure of a reactive polymer comprising: (a) greater than 1 mol % of recurring units comprising sulfonic acid or sulfonate groups, (b) at least 5 mol % of recurring units comprising a pendant group capable of crosslinking via [2+2] photocycloaddition, and optionally (c) at least 1 mol % of recurring units comprising a pendant amide, amine, hydroxyl, lactam, phosphonic acid, or carboxylic acid group, all amounts based on the total recurring units in the reactive polymer.

7. The copper-containing article of claim 6 , wherein the water-insoluble composition comprises copper nanoparticles that have an average diameter of at least 2 nm and up to and including 500 nm.

8. The copper-containing article of claim 6 , wherein the same or different crosslinked water-insoluble complex is disposed on both the first supporting side and the opposing second supporting side of the substrate in the same or different patternwise fashion.

9. The copper-containing article of claim 6 , wherein the substrate is a continuous polymeric web.

10. The copper-containing article of claim 6 , wherein the reactive polymer comprises:

(i-a) at least 5 mol % and up to and including 50 mol % of the recurring units comprising a pendant group capable of crosslinking via [2+2] photocycloaddition, based on the total recurring units in the reactive polymer,

(i-b) at least 1 mol % and up to and including 93 mol % of recurring units comprising a pendant hydroxyl, amide, or carboxylic acid group, based on the total recurring units in the reactive polymer, or

both (i-a) and (i-b).

11. The copper-containing article of claim 6 , wherein the recurring units comprising a pendant group capable of crosslinking via [2+2] photocycloaddition comprise:

a photosensitive —C(═O)—CR═CR 1 —Y group wherein R and R 1 are independently hydrogen or an alkyl group having 1 to 7 carbon atoms, a 5- to 6-membered cycloalkyl group, an alkoxy group having 1 to 7 carbon atoms, a phenyl group, or a phenoxy group, and Y is an aryl or heteroaryl group;

(ii) a photosensitive, non-aromatic unsaturated carbocyclic group;

(iii) a photosensitive, aromatic or non-aromatic heterocyclic group comprising a carbon-carbon double bond that is conjugated with an electron withdrawing group;

(iv) a photosensitive non-aromatic unsaturated heterocyclic group comprising one or more amide groups that are conjugated with a carbon-carbon double bond, which photosensitive non-aromatic unsaturated heterocyclic group is linked to the water-soluble backbone at an amide nitrogen atom; or

(v) a photosensitive substituted or unsubstituted 1,2-diarylethylene group.