Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > New research could lead to practical uses for metal-organic frameworks

Argonne scientist Karena Chapman examines the diamond anvil pressure cell at the Advanced Photon Source.
Argonne scientist Karena Chapman examines the diamond anvil pressure cell at the Advanced Photon Source.

Abstract:
Scientists at U.S. Department of Energy's Argonne National laboratory are putting the pressure on metal-organic frameworks (MOF).

New research could lead to practical uses for metal-organic frameworks

ARGONNE, IL | Posted on September 25th, 2008

In MOF materials, organic molecules can connect metal ions to form scaffolding-like structures similar to a molecular Tinker toy. The struts that make up the structure do not fill space efficiently, in the way that Lego blocks might, leaving extra spaces in the structure that can contain guest molecules.

Acting like molecular-scale sponges, these MOFs have wide ranging potential uses for filtering, capturing or detecting molecules such as carbon dioxide or hydrogen storage for fuel cells.

"By examining the framework at various pressures," scientist Karena Chapman said, "we found that the MOF compresses rapidly at high pressures."

Since the MOF frameworks do not fill space efficiently, the structures are particularly sensitive to even relatively moderate applied pressures. For any carbon dioxide or hydrogen gas storage application, the MOF materials - which generally form as fine particles or small crystals - will need to be compressed into pellets to optimize their volume capacity. This compression would subject the structure to pressures up to several gigapascals (GPa).

While a few GPa of pressure would have minimal impact on denser oxide-based materials, the MOFs' structure may show significant and possibly irreversible distortions, altering their ability to store gas selectively.

Understanding how MOF materials behave under pressure is an important step in taking MOF technology beyond the lab.

Using a diamond anvil cell at the laboratory's Advanced Photon Source, Chapman, along with Argonne scientists Gregory Halder and Peter Chupas, synthesized a copper-benzenetricarboxylate MOF and subjected its framework to various pressures with and without pressure-transmitting fluids.

X-ray diffraction from Advanced Photon Source data showed a transition from the hard regime, where pressure transmitting fluid penetrates the framework cavities, to a soft regime, where the MOF compresses concertedly.

This uncharacteristic behavior is caused by smaller molecules in the pressure-transmitting fluid that can permeate the framework's cavities. This leads to a supersaturated state that counteracts the external pressure until a threshold pressure is reached, when the MOF rapidly compresses and cannot allow any additional guest molecules into the cavities.

"MOFs have wide and varied potential applications in the real world," Chapman said. "By exploring high-pressure phenomena, we come a step closer to realizing these advanced applications."

A paper on their work can be seen in a recent edition of the Journal of the American Chemical Society. Funding for this research was provided by the Office of Basic Energy Sciences (BES) in the U.S. Department of Energy's Office of Science. BES manages a multipurpose, scientific research effort to foster and support fundamental research to expand the scientific foundations for new and improved energy technologies and for understanding and mitigating the environmental impacts of energy use.

####

About Argonne National Laboratory
Argonne National Laboratory brings the world's brightest scientists and engineers together to find exciting and creative new solutions to pressing national problems in science and technology. The nation's first national laboratory, Argonne conducts leading-edge basic and applied scientific research in virtually every scientific discipline. Argonne researchers work closely with researchers from hundreds of companies, universities, and federal, state and municipal agencies to help them solve their specific problems, advance America 's scientific leadership and prepare the nation for a better future. With employees from more than 60 nations, Argonne is managed by UChicago Argonne, LLC for the U.S. Department of Energy's Office of Science.

For more information, please click here

Contacts:
Brock Cooper
630/252-5565

Copyright © Argonne National Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Northwestern researchers achieve unprecedented control of polymer grids: Materials could find applications in water purification, solar energy storage, body armor June 22nd, 2018

Nanobiotix Publishes Positive Phase 2/3 Data For Nanomedicine in Soft Tissue Cancer (Webcast June 22) June 22nd, 2018

Alzheimer's breakthrough: Brain metals that may drive disease progression revealed: In brains affected by Alzheimer's, researchers identify chemically reduced iron species, with mineral forms including a magnetic iron oxide June 22nd, 2018

Collaboration yields discovery of 12-sided silica cages June 20th, 2018

Discoveries

Alzheimer's breakthrough: Brain metals that may drive disease progression revealed: In brains affected by Alzheimer's, researchers identify chemically reduced iron species, with mineral forms including a magnetic iron oxide June 22nd, 2018

Collaboration yields discovery of 12-sided silica cages June 20th, 2018

Carbon nanotube optics poised to provide pathway to optical-based quantum cryptography and quantum computing: Researchers are exploring enhanced potential of carbon nanotubes for unique applications June 18th, 2018

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Materials/Metamaterials

Northwestern researchers achieve unprecedented control of polymer grids: Materials could find applications in water purification, solar energy storage, body armor June 22nd, 2018

Making quantum puddles: Physicists discover how to create the thinnest liquid films ever June 13th, 2018

Nickel ferrite promotes capacity and cycle stability of lithium-sulfur battery June 13th, 2018

Evidence for a new property of quantum matter revealed: Electrical dipole activity detected in a quantum material unlike any other tested June 11th, 2018

Announcements

Northwestern researchers achieve unprecedented control of polymer grids: Materials could find applications in water purification, solar energy storage, body armor June 22nd, 2018

Nanobiotix Publishes Positive Phase 2/3 Data For Nanomedicine in Soft Tissue Cancer (Webcast June 22) June 22nd, 2018

Alzheimer's breakthrough: Brain metals that may drive disease progression revealed: In brains affected by Alzheimer's, researchers identify chemically reduced iron species, with mineral forms including a magnetic iron oxide June 22nd, 2018

Collaboration yields discovery of 12-sided silica cages June 20th, 2018

Energy

Northwestern researchers achieve unprecedented control of polymer grids: Materials could find applications in water purification, solar energy storage, body armor June 22nd, 2018

Physicists devise method to reveal how light affects materials: The new method adds to the understanding of the fundamental laws governing the interaction of electrons and light June 15th, 2018

Tripling the Energy Storage of Lithium-Ion Batteries: Scientists have synthesized a new cathode material from iron fluoride that surpasses the capacity limits of traditional lithium-ion batteries June 14th, 2018

Remote control of transport through nanopores: New study outlines key factors affecting the transfer of molecules through biological channels May 24th, 2018

Fuel Cells

Harvesting clean hydrogen fuel through artificial photosynthesis May 3rd, 2018

A new way to find better battery materials: Design principles could point to better electrolytes for next-generation lithium batteries March 29th, 2018

Rice sleuths find metal in 'metal-free' catalysts: Study of graphene catalysts finds trace of manganese, suggests better ultrathin fuel-cell components February 26th, 2018

Study boosts hope for cheaper fuel cells: Rice University researchers show how to optimize nanomaterials for fuel-cell cathodes January 6th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project