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 Mb is selected from the group consisting of Al +3 , Ga 3+ , Fe +2 , Fe +3 , Cr 2+ , Cr 3+ , Ti 3+ , V 3+ , V 5+ , Sc 3+ , In 3+ , and Y 3+ ; and

a square grid characterized by the formula (M a (ligand) x ), where M a is selected from periodic groups IB, IIA, IIB, IIIA, IVA, IVB, VIB, VIIB, and VIII, where the ligand is a polyfunctional organic ligand, and x is 1 or more;

wherein the square grid and pillar associate to form the metal-organic framework.

2. The metal-organic framework of claim 1 , wherein M a is selected from Cu 2+ , Zn 2+ , Co 2+ , Ni 2+ , Mn 2+ , Zr 2+ , Ca 2+ , Ba 2+ , Pb 2+ , Pt 2+ , Pd 2+ , Ru 2+ , Rh 2+ , Cd 2+ , Mg 2+ , Al +3 , Fe 2+ , Fe +3 , Cr 2+ , Cr 3+ , Ru 3+ , and Co 3+ .

3. The metal-organic framework of claim 1 , wherein M a is selected from Cu 2+ , Zn 2+ , Co 2+ , Ni 2+ , Mn 2+ , Zr 2+ , Fe 2+ , Ca 2+ , Ba 2+ , Pb 2+ , Pt 2+ , Pd 2+ , Rh 2+ , Cd 2+ , Mg 2+ , Cr 2+ , and Ru 2+ .

4. The metal-organic framework of claim 1 , wherein the ligand is a bifunctional N-donor ligand.

5. The metal-organic framework of claim 1 , wherein the ligand includes a monocyclic group structure or a polycyclic group structure.

6. The metal-organic framework of claim 1 , wherein the ligand is selected from pyridine, pyrazine, pyrimidine, pyridazine, triazine, thiazole, oxazole, pyrrole, imidazole, pyrazole, triazole, oxadiazole, thiadiazole, quinoline, benzoxazole, and benzimidazole.

7. The metal-organic framework of claim 1 , wherein the ligand includes one or more of pyrazine, pyridazine, oxazole, imidazole, pyrazole, and benzimidazole.

8. The metal-organic framework of claim 1 , wherein the ligand includes one or more of thiazole, oxadiazole, thiadiazole, and benzoxazole.

9. The metal-organic framework of claim 1 , wherein the ligand includes one or more of triazine and triazole.

10. The metal-organic framework of claim 1 , wherein the square grid is (M a (pyrazine) 2 ).

11. The metal-organic framework of claim 10 , wherein M a is Ni.

12. The metal-organic framework of claim 10 , wherein the metal-organic framework exhibits a primitive cubic (pcu) topology.

13. The metal-organic framework of claim 1 , wherein Mb is Al +3 , V 3+ , V 5+ , Fe +2 , or Fe +3 .

14. The metal-organic framework of claim 1 , wherein the pillar is (AlF 5 (H 2 O)) 2− .

15. The metal-organic framework of claim 1 , wherein the pillar is (FeF 5 (H 2 O)) 2− .

16. 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.

17. The metal organic framework of claim 1 , wherein a pore size of the metal-organic framework ranges from about 3.3 Å to about 3.8 Å.

18. 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.

19. 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.

20. A metal-organic framework, comprising:

a pillar characterized by the formula (M b F 5 (O/H 2 O)), where Mb is selected from Al +3 , Ga 3+ , Fe +2 , Fe +3 , Cr 2+ , Cr 3+ , Ti 3+ , V 3+ , V 5+ , Sc 3+ , In 3+ , and Y 3+ ; and

a square grid characterized by the formula (M a (ligand) x ), wherein M a is selected from Al +3 , Fe +3 , Cr 3+ , Ru 3+ , and Co 3+ , where the ligand is a polyfunctional organic ligand, and x is 1 or more;

wherein the square grid and pillar associate to form the metal-organic framework.