Doping of metal-organic frameworks towards resistive sensing

Author(s)
Hidetsugu Shiozawa, Bernhard C. Bayer, Herwig Peterlik, Jannik C. Meyer, Wolfgang Lang, Thomas Pichler
Abstract

Coordination polymerization leads to various metal–organic frameworks (MOFs) with unique physical properties and chemical functionalities. One of the challenges towards their applications as porous materials is to make MOFs optimally conductive to be used as electronic components. Here, it is demonstrated that Co-MOF-74, a honeycomb nano–framework with one–dimensionally arranged cobalt atoms, advances its physical properties by accommodating tetracyanochinodimethan (TCNQ), an acceptor molecule. Strong intermolecular charge transfer reduces the optical band gap down to 1.5 eV of divalent TCNQ and enhances the electrical conduction, which allows the MOF to be utilized for resistive gas- and photo-sensing. The results provide insight into the electronic interactions in doped MOFs and pave the way for their electronic applications.

Organisation(s)
Electronic Properties of Materials, Physics of Nanostructured Materials, Dynamics of Condensed Systems, Faculty Center for Nano Structure Research
Journal
Scientific Reports
Volume
7
No. of pages
8
ISSN
2045-2322
DOI
https://doi.org/10.1038/s41598-017-02618-y
Publication date
05-2017
Publication status
Published
Peer reviewed
Yes
Austrian Fields of Science 2012
103009 Solid state physics, 103018 Materials physics, 103020 Surface physics
Keywords
POROUS COORDINATION POLYMER, SALTS, SPECTRA, TCNQ, SURFACE, ANION, ALPHA,ALPHA-DICYANO-P-TOLUOYLCYANIDE, SUPERCONDUCTIVITY, TEMPERATURE, MOLECULES
Portal url
https://ucris.univie.ac.at/portal/en/publications/doping-of-metalorganic-frameworks-towards-resistive-sensing(4415a20e-3a71-4a00-9dd4-f8adcd714a76).html