Chromium-based metal-organic frameworks for water adsorption-related applications and gas storage

Patent metadata

Field	Value
Publication number	US-2021069672-A1
Application number	US-201816642525-A
Country	US
Kind code	A1
Filing date	Sep 19, 2018
Priority date	Sep 19, 2017
Publication date	Mar 11, 2021
Grant date	—

Abstract

Embodiments of the present disclosure describe a metal-organic framework (MOF) composition comprising a plurality of metal clusters, wherein the metal is chromium; and one or more tetratopic ligands; wherein the metal clusters and ligands associate to form a MOF with soc topology. A method of making a MOF comprising contacting a template MOF of formula Fe-soc-MOF and a reactant including chromium in a presence of dimethylformamide sufficient to replace Fe with Cr and form an exchanged MOF of formula Cr-soc-MOF. A method of sorbing water vapor comprising exposing a Cr-soc-MOF to an environment; and sorbing water vapor using the Cr-soc-MOF.

First claim

1 . A method of sorbing water vapor, comprising:
exposing a Cr-soc-MOF to an environment; and sorbing water vapor using the Cr-soc-MOF.

2 . The method of claim 1 , wherein
the Cr-soc-MOF adsorbs water vapor as a relative humidity of the environment increases.

3 . The method of claim 1 , wherein the Cr-soc-MOF desorbs water vapor as a relative humidity of the environment decreases.

4 . The method of claim 1 , wherein a working capacity of the Cr-soc-MOF is between about 35% RH and about 65% RH.

5 . The method of claim 1 , wherein a mass of adsorbed water is about two times a weight of the Cr-soc-MOF.

6 . The method of claim 1 , wherein a temperature of the environment is about room temperature.

7 . The method of claim 1 , wherein adsorbed water vapor is nearly completely desorbed by reducing relative humidity to about 25% RH.

8 . The method of claim 1 , wherein adsorbed water vapor is nearly completely desorbed by reducing relative humidity without heating and/or applying evacuation.

9 . The method of claim 1 , wherein the Cr-soc-MOF is stable over at least about 100 adsorption/desorption cycles.

10 . The method of claim 1 , wherein the environment is a confined or nearly confined space.

11 . A metal-organic framework composition, comprising:
a plurality of metal clusters, wherein the metal is chromium; and one or more tetratopic ligands; wherein the metal clusters and ligands associate to form a metal-organic framework with soc topology.

12 . The composition of claim 11 , wherein the one or more tetratopic ligands are characterized by the chemical formula:

wherein each X is independently selected from the group consisting of aryls, polyaryls, heteroaryls, and alkynes; wherein each Y is independently selected from the group consisting of aryls and heteroaryls; wherein each A is independently selected from the group consisting of COOH, tetrazole, triazole, and pyrazole; wherein each n is at least 1.

13 . The composition of claim 11 , wherein the one or more tetratopic ligands include H 4 TCPT.

14 . The composition of claim 11 , wherein the metal-organic framework includes at least about 90% chromium.

15 . The composition of claim 11 , wherein an oxidation state of chromium is (+III).

16 . The composition of claim 11 , further comprising one or more of a counterion and guest solvent.

17 . The composition of claim 11 , wherein the counteranion is Cl − .

18 . A method of making a metal-organic framework (MOF), comprising:
contacting a template MOF of formula Fe-soc-MOF and a reactant including chromium in a presence of dimethylformamide (DMF) sufficient to replace Fe with Cr and form an exchanged MOF of formula Cr-soc-MOF.

19 . The method of claim 18 , wherein the exchanged MOF is one or more of isostructural and isoreticular with the template MOF.

20 . The method of claim 18 , wherein the exchanged MOF includes at least about 90% of chromium.

Assignees

• Univ King Abdullah Sci & Tech

Inventors

• Abtab Sk Md Towsif
• Belmabkhout Youssef
• Bhatt Prashant
• Eddaoudi Mohamed

Classifications

• B01D53/261

  by adsorption · CPC title

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• B01D2253/204

  Metal organic frameworks (MOF's) · CPC title

• C07F11/005

  compounds without a metal-carbon linkage · CPC title

• B01D2257/80

  Water · CPC title