Featured Research

from universities, journals, and other organizations

New Research Could Lead To Practical Uses For Metal-organic Frameworks

Date:
October 3, 2008
Source:
DOE/Argonne National Laboratory
Summary:
Scientists are putting the pressure on metal-organic frameworks. Behaving as 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.

Argonne scientist Karena Chapman examines the diamond anvil pressure cell at the Advanced Photon Source.
Credit: Image courtesy of DOE/Argonne National Laboratory

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

Related Articles


In MOF materials, metal ions can be connected by organic molecules to form scaffolding-like structures similar to a molecular Tinker toy. The struts that make up the framework structure do not fill space efficiently, in the way that Lego blocks might, leaving extra spaces in the structure which are capable of containing guest molecules.

Behaving as 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 applications, the MOF materials (which are generally formed as fine particles or small crystals) will need to be compressed into pellets to optimize the volume capacity (an important target parameter). This 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, MOFs may show significant and possibly irreversible distortions to the structure and to the selective gas storage properties. Understanding how MOF materials can behave under pressure is an important step in taking MOF technology beyond the lab.

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

X-ray diffraction from the laboratory's 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 the presence of 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 and 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 phenomenon, 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 U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences (BES).


Story Source:

The above story is based on materials provided by DOE/Argonne National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

DOE/Argonne National Laboratory. "New Research Could Lead To Practical Uses For Metal-organic Frameworks." ScienceDaily. ScienceDaily, 3 October 2008. <www.sciencedaily.com/releases/2008/09/080925114128.htm>.
DOE/Argonne National Laboratory. (2008, October 3). New Research Could Lead To Practical Uses For Metal-organic Frameworks. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2008/09/080925114128.htm
DOE/Argonne National Laboratory. "New Research Could Lead To Practical Uses For Metal-organic Frameworks." ScienceDaily. www.sciencedaily.com/releases/2008/09/080925114128.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NASA's First 3-D Printer In Space Creates Its First Object

NASA's First 3-D Printer In Space Creates Its First Object

Newsy (Nov. 26, 2014) The International Space Station is now using a proof-of-concept 3D printer to test additive printing in a weightless, isolated environment. Video provided by Newsy
Powered by NewsLook.com
Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins