Featured Research

from universities, journals, and other organizations

Large pores: Researchers develop new method to produce metal-organic frameworks

Date:
December 5, 2012
Source:
Karlsruhe Institute of Technology
Summary:
Researchers have developed a new method to produce metal-organic frameworks (MOFs). By means of the so-called liquid-phase epitaxy, the scientists succeeded in producing a new class of MOFs with a pore size never reached before. These frameworks open up interesting applications in medicine, optics, and photonics.

Structure of SURMOF 2 metal-organic frameworks: The pore size may reach up to three times three nanometers.
Credit: Dr. Jinxuan Liu, IFG

Researchers of the KIT Institute of Functional Interfaces (IFG), Jacobs University Bremen, and other institutions have developed a new method to produce metal-organic frameworks (MOFs). By means of the so-called liquid-phase epitaxy, the scientists succeeded in producing a new class of MOFs with a pore size never reached before.

Related Articles


These frameworks open up interesting applications in medicine, optics, and photonics. The new class of MOFs, called "SURMOF 2," is presented in the journal Nature Scientific Reports.

Metal-organic frameworks (MOFs) can store nanoscaled objects and make them available for various applications. For this reason, they are of particular interest in many research areas, including materials sciences, biology, and medicine. MOFs are highly ordered molecular systems, consisting of metal nodes and organic rods. The pores in these frameworks are freely accessible. MOFs are used in powder form to store hydrogen and other small molecules, such as carbon dioxide or methane. For more complex applications, such as the storage and subsequent release of antibiotics, MOF coatings of higher mechanical loadability are required.

At the KIT Institute of Functional Interfaces (IFG), the team of the head of institute Professor Christof Wöll is working on new methods for the production of MOFs. They make the MOF structures grow epitaxially, i.e. in layer-by-layer scheme, on the surface of substrates (SURMOFs -- Surface-mounted Metal-organic Frameworks). In this way, the size and shape of the pores as well as their chemical functionality can be adjusted to the planned application. A special method developed by the IFG, the so-called liquid-phase epitaxy (LPE), allows for the production of framework structures that cannot be generated by conventional wet chemical methods. Detailed theoretical analysis by the group of Professor Heine of Jacobs University Bremen revealed that the interactions between the organic rods are responsible for the stability of these frameworks with large pores. In the Nature Scientific Reports journal, the researchers from IFG and the Institute of Organic Chemistry (IOC) of KIT, Jacobs University Bremen, and other institutions in Mainz, Bielefeld, and Thuwal/Saudi Arabia present a series of structurally related, highly symmetric frameworks with very large pores, which were produced by means of the LPE method.

These novel MOFs that are referred to as "SURMOFs 2" are produced by synthesizing various special organic molecules of variable lengths. The pore size of the new metal-organic frameworks is three times three nanometers. Hence, the pores have sufficient space for small proteins. Now, the researchers are working on increasing the length of the organic rods in order to be able to store even larger proteins and possibly also metallic nanoparticles in the next step. This will allow for interesting applications in optics and photonics.

"We think that SURMOFs 2 will have considerable potentials as optical materials. In the next step, we plan to produce heterolayers, in which different materials will be stacked on top of each other," explains Professor Christof Wöll from the IFG. "The application potential of metal-organic frameworks can hardly be predicted at the moment. MOFs are composed structures. Chemists have learned how the components may be combined in a framework. Now, it will be important to use the variety of molecules known in chemistry to develop new materials with new application potentials that might revolutionize catalysis, sensor technology, or logical storage materials. Computer simulations are ideal to determine the components to be used for producing frameworks with optimum properties at the laboratory," explains Professor Thomas Heine from Jacobs University Bremen.


Story Source:

The above story is based on materials provided by Karlsruhe Institute of Technology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jinxuan Liu, Binit Lukose, Osama Shekhah, Hasan Kemal Arslan, Peter Weidler, Hartmut Gliemann, Stefan Bräse, Sylvain Grosjean, Adelheid Godt, Xinliang Feng, Klaus Müllen, Ioan-Bogdan Magdau, Thomas Heine, Christof Wöll. A novel series of isoreticular metal organic frameworks: realizing metastable structures by liquid phase epitaxy. Scientific Reports, 2012; 2 DOI: 10.1038/srep00921

Cite This Page:

Karlsruhe Institute of Technology. "Large pores: Researchers develop new method to produce metal-organic frameworks." ScienceDaily. ScienceDaily, 5 December 2012. <www.sciencedaily.com/releases/2012/12/121205083832.htm>.
Karlsruhe Institute of Technology. (2012, December 5). Large pores: Researchers develop new method to produce metal-organic frameworks. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2012/12/121205083832.htm
Karlsruhe Institute of Technology. "Large pores: Researchers develop new method to produce metal-organic frameworks." ScienceDaily. www.sciencedaily.com/releases/2012/12/121205083832.htm (accessed December 20, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, December 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) — Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) — What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Buzz60 (Dec. 19, 2014) — A double-amputee makes history by becoming the first person to wear and operate two prosthetic arms using only his mind. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) — The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
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