Highly stable Ni—M F6—NH2O/onpyrazine2(solvent)x metal organic frameworks and methods of use
Provided herein are metal organic frameworks comprising metal nodes and N-donor organic ligands. Methods for capturing chemical species from fluid compositions comprise contacting a metal organic framework characterized by the formula [M a M b F 6-n (O/H 2 O) w (Ligand) x (solvent) y ] z with a fluid composition and capturing one or more chemical species from the fluid composition.
1. A method of CO 2 removal, comprising:
contacting a metal organic framework with air from a confined space; and
capturing CO 2 from the air;
wherein the metal organic framework comprises:
a pillar of the formula (M b F 5 (O/H 2 O)), where M b is selected from periodic groups IIIA, IIIB, IVB, VB, VIB, and VIII, and
a square grid of the formula (M a (ligand) x ), where M a is selected from periodic groups IB, IIA, IIB, IIIA, IVA, IVB, VIB, VIIB, and VIII, ligand is a polyfunctional organic ligand, and x is 1 or more,
wherein the pillar associates with the square grid to form the metal organic framework.
2. The method of claim 1 , further comprising, after capturing, recycling air having a reduced concentration of CO 2 back to the confined space.
3. The method of claim 1 , further comprising regenerating the metal organic framework once a CO 2 removal capacity of the metal organic framework is reached.
4. The method of claim 3 , wherein the energy requirements for the regenerating is about 2500 kJ/kg CO 2 or less.