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

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Bibliographic Details
Title:	Tunable Electrical Conductivity in Metal-Organic Framework Thin-Film Devices.
Authors:	Talin, A. Alec, Centrone, Andrea, Ford, Alexandra C., Foster, Michael E., Stavila, Vitalie, Haney, Paul, Kinney, R. Adam, Szalai, Veronika, El Gabaly, Fand, Yoon, Heayoung P., Léonard, François, Allendorf, Mark D.
Source:	Science (pre-March 2025). 1/3/2014, Vol. 343 Issue 6166, p66-69. 4p.
Subjects:	Electric conductivity research, Metal-organic frameworks, Thin film devices, Nanopores, Electronic equipment
Abstract:	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-l,3,5-tricarboxylic acid) infiltrated with the molecule 7,7,8,8-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. [ABSTRACT FROM AUTHOR]
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Database:	Psychology and Behavioral Sciences Collection

Description
Abstract:	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-l,3,5-tricarboxylic acid) infiltrated with the molecule 7,7,8,8-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. [ABSTRACT FROM AUTHOR]
ISSN:	00368075
DOI:	10.1126/science.1246738