Highly stable [MaMbF6-n(O/H2O)n(ligand)2(solvent)x]n metal organic frameworks

1. A metal organic framework, comprising:

a pillar characterized by the formula (M b F 5 (O/H 2 O)), where M b is an element from periodic groups IIIA, IIIB, IVB, VB, VIB, and VIII; and

a square grid characterized by the formula (M a (ligand) x ), where M a is Ni 2+ , ligand is pyrazine, and x is 2;

wherein pillaring of the square grids with the pillars forms a metal-organic framework.

2. The metal organic framework of claim 1 , wherein M b comprises Al +3 , Ga 3+ , Fe +2 , Fe +3 , Cr 2+ , Cr 3+ , Ti 3+ , V 3+ , V 5+ , Sc 3+ , In 3+ , Nb 5+ , or Y 3+ .

3. The metal organic framework of claim 1 , wherein the pillar is (NbOF 5 ) 2− , (AlF 5 (H 2 O)) 2− , or (FeF 5 (H 2 O)) 2− .

4. The metal organic framework of claim 1 , wherein the pillar is (NbOF 5 ) 2− , wherein the metal organic framework includes a double-bonded oxygen in a confined space.

5. The metal organic framework of claim 1 , wherein the metal organic framework includes open metal sites in a confined space.

6. The metal organic framework of claim 1 , wherein the metal organic framework is stable in the presence of water and H 2 S.

7. The metal organic framework of claim 1 , wherein the metal organic framework includes one or more open metal sites.

8. The metal organic framework of claim 1 , wherein a pore size of the metal organic framework ranges from about 2.8 Å to about 4.8 Å.

9. The metal organic framework of claim 1 , wherein a specific surface area of the metal organic framework ranges from about 250 m 2 /g to about 500 m 2 /g.

10. The metal organic framework of claim 1 , wherein a pore volume of the metal organic framework ranges from about 0.1 cm 3 /g to about 0.25 cm 3 /g.

11. A method of fabricating a metal organic framework, the method comprising:

combining a fluorhydric acid solution, a Ni 2+ source, a second metal source, and a solvent, sufficient to form a mixture;

reacting the mixture over a period of time sufficient to form a reacted mixture;

processing the reacted mixture to provide a metal organic framework via pillaring of square grids with a pillar,

wherein the pillar is characterized by the formula (M b F 5 (O/H 2 O)), where M b is an element from periodic groups IIIA, IIIB, IVB, VB, VIB, and VIII, and the square grids are characterized by the formula (M a (ligand) x ), where M a is Ni 2+ ; ligand is pyrazine, and x is 2.

12. The method of claim 11 , wherein the second metal source comprises an Al +3 source, an Fe +2 source, an Fe +3 source, a Cr 2+ source, a Cr 3+ source, a Ti 3+ source, a V 3+ source, a V 5+ source, a Sc 3+ source, an In 3+ source, a Nb 5+ source, or a Y 3+ source.

13. The method of claim 11 , wherein the solvent comprises one or more of water, ethanol, methanol, dimethylformamide, and diethylformamide.

14. The method of claim 11 , wherein reacting the mixture comprises heating the mixture to a temperature between about 80° C. to about 200° C.

15. The method of claim 11 , wherein processing the reacted mixture comprises one or more of filtering, rinsing with water, and removing excess reactants.

16. The method of claim 11 , further comprising evacuating guest molecules from the metal organic framework to create open metal sites.

17. The method of claim 11 , wherein the Ni 2+ source is nickel nitrate, hydrated nickel nitrate, nickel chloride, hydrated nickel chloride, nickel fluoride, hydrated nickel fluoride, nickel oxide, or hydrated nickel oxide.

18. The method of claim 11 , wherein the pillar is (NbOF 5 ) 2− , (AlF 5 (H 2 O)) 2− , or (FeF 5 (H 2 O)) 2− .

19. The method of claim 11 , wherein the pillar is (NbOF 5 ) 2− , wherein the metal organic framework includes a double-bonded oxygen in a confined space.

20. The method of claim 11 , wherein M b comprises Al +3 , Ga 3+ , Fe +2 , Fe +3 , Cr 2+ , Cr 3+ , Ti 3+ , V 3+ , V 5+ , Sc 3+ , In 3+ , Nb 5+ , or Y 3+ .