Details

Autor(en) / Beteiligte

• Talin, A. Alec
• Centrone, Andrea
• Ford, Alexandra C.
• Foster, Michael E.
• Stavila, Vitalie
• Haney, Paul
• Kinney, R. Adam
• Szalai, Veronika
• Gabaly, Farid El
• Yoon, Heayoung P.
• Léonard, François
• Allendorf, Mark D.

Titel

Tunable Electrical Conductivity in Metal-Organic Framework Thin-Film Devices

Ist Teil von

• Science (American Association for the Advancement of Science), 2014-01, Vol.343 (6166), p.66-69

Ort / Verlag

United States: American Association for the Advancement of Science

Erscheinungsjahr

2014

Link zum Volltext

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• We report a strategy for realizing tunable electrical conductivity in metal-organic frameworks (MOFs) in which the nanopores are infiltrated with redox-active, conjugated guest molecules. This approach is demonstrated using thin-film devices of the MOF Cu₃(BTC)₂ (also known as HKUST-1; BTC, benzene-1,3,5-tricarboxylic acid) infiltrated with the molecule 77,8,8-tetracyanoquinododimethane (TCNQ). Tunable, air-stable electrical conductivity over six orders of magnitude is achieved, with values as high as 7 Siemens per meter. Spectroscopic data and first-principles modeling suggest that the conductivity arises from TCNQ guest molecules bridging the binuclear copper paddlewheels in the framework, leading to strong electronic coupling between the dimeric Cu subunits. These ohmically conducting porous MOFs could have applications in conformai electronic devices, reconfigurable electronics, and sensors.