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Grzybowski, Bartosz A.
School of Natural Science
Research Interests
  • Nano science
  • Nanomaterials
  • Programmable Reactions
  • Chemical Networks
  • Cellular Dynamics

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Tunneling Electrical Connection to the Interior of Metal-Organic Frameworks

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Title
Tunneling Electrical Connection to the Interior of Metal-Organic Frameworks
Author
Han, ShuangbingWarren, Scott C.Yoon, Seok MinMalliakas, Christos D.Hou, XianliangWei, YanhuKanatzidis, Mercouri G.Grzybowski, Bartosz A.
Issue Date
2015-07
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.137, no.25, pp.8169 - 8175
Abstract
(Figure Presented). Metal-organic frameworks (MOFs) are typically poor electrical conductors, which limits their uses in sensors, fuel cells, batteries, and other applications that require electrically conductive, high surface area materials. Although metal nanoclusters (NCs) are often added to MOFs, the electrical properties of these hybrid materials have not yet been explored. Here, we show that adding NCs to a MOF not only imparts moderate electrical conductivity to an otherwise insulating material but also renders it photoconductive, with conductivity increasing by up to 4 orders of magnitude upon light irradiation. Because charge transport occurs via tunneling between spatially separated NCs that occupy a small percent of the MOF's volume, the pores remain largely open and accessible. While these phenomena are more pronounced in single-MOF crystals (here, Rb-CD-MOFs), they are also observed in films of smaller MOF crystallites (MIL-53). Additionally, we show that in the photoconductive MOFs, the effective diffusion coefficients of electrons can match the typical values of small molecules diffusing through MOFs; this property can open new vistas for the development of MOF electrodes and, in a wider context, of electroactive and light-harvesting MOFs. © 2015 American Chemical Society
URI
https://scholarworks.unist.ac.kr/handle/201301/13154
URL
http://pubs.acs.org/doi/abs/10.1021/jacs.5b03263
DOI
10.1021/jacs.5b03263
ISSN
0002-7863
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