Porous aluminum pyrazoledicarboxylate frameworks
A porous aluminum-based metal-organic framework (MOF) comprises inorganic aluminum chains linked via carboxylate groups of 1H-pyrazole-3,5-dicarboxylate (HPDC) linkers, and of formula: [Al(OH)(C 5 H 2 O 4 N 2 )(H 2 O)].
1. A porous aluminum-based metal-organic framework (MOF) comprising inorganic aluminum chains linked via carboxylate groups of 1H-pyrazole-3,5-dicarboxylate (HPDC) linkers, and of formula: [Al(OH)(C 5 H 2 O 4 N 2 )(H 2 O)], wherein:
each Al (III) ion is capped by four O atoms from four different carboxylate groups and two O atoms from two hydroxyl groups forming AlO 6 octahedra, and the AlO 6 octahedra form corner-sharing chains, and depending on the cis- and trans-position of two adjacent bridging hydroxyl groups, helical chains in MOF-303 (cis-) and MOF-573 (trans-) form respectively.
2. The MOF of claim 1 that is MOF-303, wherein:
the linkers further bridge two of the chains together, leading to the formation of a 3D framework delimiting square-shaped one dimensional channels with diameter of 6 Å in diameter (measured by the largest fitting sphere);
the MOF-303 has a topology of xhh; and/or
the MOF has permanent porosity and a Brunauer-Emmett-Teller (BET) surface area of 1380 and pore volume of 0.55 cm 3 g −1 .
3. The MOF of claim 1 that is MOF-573, wherein:
the linkers further bridge two of the chains together, leading to the formation of a 3D framework delimiting square-shaped one dimensional channels with diameter of 5 Å in diameter (measured by the largest fitting sphere);
the MOF has a topology of upt; and/or
the MOF has permanent porosity and a Brunauer-Emmett-Teller (BET) surface area of 980 m 2 g −1 and pore volume of 0.56 cm 3 g −1 .
4. The MOF of claim 1 further comprising an adsorbed material that is water.
5. The MOF of claim 2 further comprising an adsorbed material that is water.
6. The MOF of claim 3 further comprising an adsorbed material that is water.
7. The MOF of claim 1 further comprising an adsorbed material that is carbon dioxide.
8. The MOF of claim 2 further comprising an adsorbed material that is carbon dioxide.
9. The MOF of claim 3 further comprising an adsorbed material that is carbon dioxide.
10. A method of making the MOF of claim 1 comprising the step of linking aluminum (III) ions and 3,5-pyrazoledicarboxylic acid.
11. A method of making the MOF of claim 2 comprising the step of linking aluminum (III) ions and 3,5-pyrazoledicarboxylic acid.
12. A method of making the MOF of claim 3 comprising the step of linking aluminum (III) ions and 3,5-pyrazoledicarboxylic acid.
13. A method of using the MOF of claim 1 for water harvesting from humid air, comprising the steps of: contacting the MOF with humid air to absorb water from the air, and desorbing the water.
14. A method of using the MOF of claim 2 for water harvesting from humid air, comprising the steps of: contacting the MOF with humid air to absorb water from the air, and desorbing the water.
15. A method of using the MOF of claim 3 for water harvesting from humid air, comprising the steps of: contacting the MOF with humid air to absorb water from the air, and desorbing the water.
16. A method of using the MOF of claim 1 for gas adsorption and separation, comprising the steps of: contacting the MOF with a gas wherein the gas adsorbs into the MOF, such as wherein the gas is carbon dioxide.
17. A method of using the MOF of claim 2 for gas adsorption and separation, comprising the steps of: contacting the MOF with a gas wherein the gas adsorbs into the MOF, such as wherein the gas is carbon dioxide.
18. A method of using the MOF of claim 3 for gas adsorption and separation, comprising the steps of: contacting the MOF with a gas wherein the gas adsorbs into the MOF, such as wherein the gas is carbon dioxide.