# US 11,077,327 B1 · Degradation of chemical agents using metal-organic framework compositions

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- Number: US 11,077,327 B1
- Document ID: US11077327B1
- Status: Granted
- Kind: B1
- Application number: 16/201,224
- Filed: 2018-11-27
- Granted: 2021-08-03
- Earliest claimed: 2017-11-27
- Assignees: National Technology & Engineering Solutions of Sandia, LLC
- Applicants: National Technology & Engineering Solutions of Sandia, LLC
- Inventors: Dorina F. Sava Gallis; Mark D. Tucker; Mark K. Kinnan; Jeffery A. Greathouse
- Web page: https://patentgrep.com/patent/US11077327B1

## CPC

- A62D 3/30: by reacting with chemical agents
- A62D 3/35: by hydrolysis
- B01J 31/1691: {Coordination polymers, e.g. metal-organic frameworks [MOF] (preparation of metal complexes containing carboxylic acid moieties C07C51/418; MOF's per se C07F)}
- B01J 31/2239: {Bridging ligands, e.g. OAc in Cr2(OAc)4, Pt4(OAc)8 or dicarboxylate ligands}
- A62D 2101/02: Chemical warfare substances, e.g. cholinesterase inhibitors
- A62D 2101/26: containing nitrogen or phosphorus
- B01J 2531/0216: Bi- or polynuclear complexes, i.e. comprising two or more metal coordination centres, without metal-metal bonds, e.g. Cp(Lx)Zr-imidazole-Zr(Lx)Cp
- B01J 2531/36: Yttrium
- B01J 2531/38: Lanthanides other than lanthanum
- B01J 2531/48: Zirconium
- A62D: CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

The present invention relates to a metal-organic framework composition, as well as constructs and methods thereof. In one particular example, the composition is employed to degrade a chemical agent in a non-aqueous environment.

## Claims

### Claim 1

A method of catalytically degrading a chemical agent, the method comprising:
providing a metal-organic framework composition comprising a plurality of metal clusters and a plurality of ligands coordinating with the plurality of metal clusters, wherein the metal of each metal cluster comprises one or more rare earth metal ions and each of the plurality of ligands comprises a 2,5-dihydroxyterephthalic acid (DOBDC) linker;
combining the metal-organic framework composition with the chemical agent and a non-aqueous solvent; and
determining a rate of decomposition of the chemical agent.

### Claim 2

A method of treating a contaminated article, the method comprising:
applying a decontamination formulation to a surface of the contaminated article, wherein the decontamination formulation comprises a metal-organic framework composition and a non-aqueous solvent, and wherein the metal-organic framework composition comprises a plurality of metal clusters and a plurality of ligands coordinating with the plurality of metal clusters and wherein the metal of each metal cluster comprises one or more rare earth metal ions and each of the plurality of ligands comprises a 2,5-dihydroxyterephthalic acid (DOBDC) linker.

### Claim 3 (depends on 2)

The method of claim 2, further comprising:
reapplying the decontamination formulation to the surface after about 15 minutes or longer.

### Claim 4 (depends on 2)

The method of claim 2, wherein the contaminated article comprises electronics or circuitry.

### Claim 5 (depends on 1)

The method of claim 1, wherein the at least one metal cluster comprises a hexanuclear cluster.

### Claim 6 (depends on 5)

The method of claim 5, wherein the hexanuclear cluster comprises Eu, Nd, Yb, Y, Tb, La, Ce, Pr, Sm, Gd, Dy, Ho, Er, Tm, or Lu.

### Claim 7 (depends on 1)

The method of claim 1, wherein the plurality of metal clusters comprises a first metal ion and a second metal ion that is different than the first metal ion.

### Claim 8 (depends on 1)

The method of claim 1, further comprising a particle that comprises the plurality of metal clusters and the plurality of ligands.

### Claim 9 (depends on 1)

The method of claim 1, wherein the metal-organic framework composition comprises EuDOBDC, YDOBDC, NdDOBDC, YbDOBDC, TbDOBDC, Nd0.67Yb0.33DOBDC, or Nd0.46Yb0.54DOBDC.

### Claim 10 (depends on 1)

The method of claim 1, wherein the non-aqueous solvent comprises an alcohol or a hydrofluoroether.