Metal-Organic Framework Exhibits Record-Setting Conductivity | Chemical & Engineering News
Volume 92 Issue 18 | p. 26 | Concentrates
Issue Date: May 5, 2014

Metal-Organic Framework Exhibits Record-Setting Conductivity

Nickel-containing MOF compound shows promise for electronics applications
Department: Science & Technology
News Channels: Organic SCENE, Materials SCENE, JACS In C&EN
Keywords: Metal-organic framework, MOF, 2-D material, graphene, band gap
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Credit: Mircea Dinca/MIT
This molecular model depicts the structure of a highly conducting nickel-containing metal organic framework material.
 
Credit: Mircea Dinca/MIT

The potential for using electrically conducting, atomically thin materials in advanced electronic devices is driving a search for new examples of these so-called two-dimensional conducting materials. Only a handful of examples, such as graph­ene, are known. A team of chemists at MIT and Harvard University just added a new one to the list. Led by MIT’s Mircea Dinca, the team reports that a new metal-organic framework compound composed of Ni3 groups and hexaaminotriphenylene units (shown) exhibits record-setting electrical conductivity for a MOF (J. Am. Chem. Soc. 2014, DOI: 10.1021/ja502765n). The team finds that in bulk form, the MOF’s conductivity measures 2 siemens per cm, about 100 times as high as the highest-conducting MOFs reported previously. Thin films of the MOF, which is the form more likely to be relevant to electronics applications, consistently exhibit a far higher room-temperature conductivity value: 40 S/cm. The team notes that unlike pure graphene, the new MOF is endowed with a band gap, a key electronic property essential to semiconductor electronics.

 
Chemical & Engineering News
ISSN 0009-2347
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