Water repellent metal-organic frameworks, process for making and uses regarding same
AssigneeUniversity of Illinois - Office of Technology Management
InventorsRichard I. MASEL, Zheng NI, Qingmei CHEN
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Abstract
Microwave assisted synthesis may be used to produce water-repellent metallic organic frameworks (MOFs) molecules. The water-repellent MOFs contain non-polar functional groups, such as a trifluoromethoxy group, which has a strong water repellent effect. The water-repellent MOF, when exposed to water vapor for one week does not result in a significant X-ray power pattern change. The water-repellent MOFs may be suitable as an adsorbent in many industrial applications, such as gas chromatography.
Claims43
A metal organic framework (MOF), comprising:
- a plurality of metals and/or metal oxides and a plurality of ligands arranged to form a crystalline structure having a surface area of at least about 100 m2/gm, wherein said plurality of ligands have a structure of formula I:
- wherein R is DY3 or A-DY3 or A-B-DY3,
- wherein A-DY2 is O or Si and B is DY2 or O or Si,
- each D is independently C or Si,
- each Y is independently hydrogen, fluorine, chlorine, or bromine,
- with the provisos that (i) at least one of A or B must be DY2 in A-B-DY3 and (ii) when D in DY2 is Si, and Y is hydrogen, chlorine, or fluorine.
A process for synthesizing a water-repellent metallic organic framework (MOF), having a crystalline structure having a surface area of greater than about 100 m2/gm, said process comprising the steps of:
- removing impurities from an organic ligand to provide a pre-treated organic ligand;
- dissolving a metal and/or metal oxide and the pre-treated organic ligand in a solvent to provide a solution;
- and
- subjecting the solution to microwaves for a time sufficient to form crystals of the water-repellent MOF.
A process for synthesizing a water-repellent metallic organic framework (MOF), having a crystalline structure and a surface area of greater than about 100 m2/gm, said process comprising the steps of:
- dissolving zinc nitrate hexahydrate and 2-trifluoromethoxy terephthalic acid in a solvent to provide a solution;
- and
- subjecting the solution to microwaves for a time sufficient to form crystals of the water-repellent MOF.
A process for synthesizing a water-repellent metallic organic framework (MOF), having a crystalline structure and a surface area of greater than about 100 m2/gm, said process comprising the steps of:
- dissolving zinc nitrate hexahydrate and 2,5-dimethylterephthalic acid in a solvent to provide a solution;
- and
- subjecting the solution to microwaves for a time sufficient to form crystals of the water-repellent MOF.
A process for synthesizing a water-repellent metallic organic framework (MOF), having a crystalline structure having a surface area of greater than about 100 m2/gm, said process comprising the steps of:
- dissolving cupric nitrate and 2,5-dimethylterephthalic acid in a solvent to provide a solution;
- and
- subjecting the solution to microwaves for a time sufficient to form crystals of the water-repellent MOF.
A process for synthesizing a water-repellent metallic organic framework (MOF), having a crystalline structure and a surface area of greater than about 100 m2/gm, said process comprising the steps of:
- dissolving cupric nitrate and 2,5-dimethoxyterephthalic acid in a solvent to provide a solution;
- subjecting the solution to microwaves for a time sufficient to form crystals of the water-repellent MOF.
A process for synthesizing a water-repellent metallic organic framework (MOF), having a crystalline structure and a surface area of greater than about 100 m2/gm, said process comprising the steps of:
- dissolving cadmium nitrate tetrahydrate and 2,5-dimethoxyterephthalic acid in a solvent to provide a solution;
- and
- subjecting the solution to microwaves for a time sufficient to form crystals of the water-repellent MOF.
Dependencies are inferred from the claim text.