Granted Patent
B2
US 12,297,216 · App. 17/260,101 · Granted May 13, 2025
Inorganic approach to rendering metal-organic frameworks electrically conductive
Inventors:
Chung-Wei Kung (Evanston, IL); Timothy Chiaan Wang (Pleasonton, CA); Joseph T. Hupp (Northfield, IL)
Assignee:
Northwestern University
C07F7/00B01J20/28011B01J20/28057B01J20/28071B01J20/28083B01J31/1691C01B37/00G01N27/04G01N33/005B01J2531/48
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Abstract
Electrically conductive, metal-organic framework (MOF) materials, methods of making the materials, and chemical sensors incorporating the materials are provided. The electrically conductive MOF materials are formed from mesoporous MOF crystals having continuous strands of electrically conductive inorganic oxides within their porous structures. The inorganic strands are formed by the condensed-phase grafting of molecular metal species onto MOF nodes.
Claims (17)
1. A metal-organic framework material comprising:
a porous metal-organic framework comprising zirconium nodes connected by organic linkers comprising 1,3,6,8-tetrakis(p-benzoic acid)pyrene units, wherein the zirconium nodes are capped by hydroxyl ligands; and
a plurality of continuous strands comprising a metal oxide running through the metal-organic framework, wherein the continuous strands of the metal oxide are grafted to oxygen atoms on the zirconium nodes, the metal oxide of the continuous strands is a tin oxide, and
the metal-organic framework material is porous.
2. The material of claim 1 , wherein the continuous strands and the metal-organic framework material are electrically conductive.
3. The material of claim 1 , wherein the metal nodes comprise an octahedral Zr 6 cluster having twelve octahedral edges and eight of the twelve octahedral edges of the metal nodes are connected to the 1,3,6,8-tetrakis(p-benzoic acid)pyrene units.
4. The material of claim 1 , wherein the metal-organic framework has a tin loading of at least 14 tin (IV) ions per Zr 6 node.
5. The material of claim 3 , wherein the material has a conductivity of at least 1×10 −7 S/cm.
6. The material of claim 1 , wherein the continuous strands have widths of 1 nm or less.
7. A method of detecting hydrogen using a metal-organic framework material comprising:
a porous metal-organic framework, the metal-organic framework comprising zirconium nodes connected by organic linkers comprising 1,3,6,8-tetrakis(p-benzoic acid)pyrene units, wherein the zirconium nodes are capped by hydroxyl ligands; and
a plurality of continuous strands of an electrically conductive metal oxide running through the metal-organic framework, wherein the continuous strands of the electrically conducive metal oxide are grafted to oxygen atoms on the zirconium nodes, the metal oxide of the continuous strands is a tin oxide, and
the metal-organic framework material is porous and electrically conductive,
the method comprising:
exposing the metal-organic framework material to an environment comprising hydrogen; and
measuring an increase in the conductance of the metal-organic framework material.
8. The metal-organic framework material of claim 1 , wherein the metal-organic framework is NU-1000.
Assignments (2)
CONFIRMATORY LICENSE
Recorded May 8, 2023
From: NORTHWESTERN UNIVERSITY
To: UNITED STATES DEPARTMENT OF ENERGY
Reel/Frame 063573/0829 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Feb 16, 2021
From: KUNG, CHUNG-WEI; WANG, TIMOTHY CHIAAN; HUPP, JOSEPH T.
To: NORTHWESTERN UNIVERSITY
Reel/Frame 055274/0329 →
Continuity (2)
Provisional Application
62701131
· Jul 20, 2018
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