Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://web.mit.edu/dincalab.
Angew Chem Int Ed Engl. 2015 Mar 27;54(14):4349-52. doi: 10.1002/anie.201411854. Epub 2015 Feb 9.
The utility of metal-organic frameworks (MOFs) as functional materials in electronic devices has been limited to date by a lack of MOFs that display high electrical conductivity. Here, we report the synthesis of a new electrically conductive 2D MOF, Cu3(HITP)2 (HITP=2,3,6,7,10,11-hexaiminotriphenylene), which displays a bulk conductivity of 0.2 S cm(-1) (pellet, two-point-probe). Devices synthesized by simple drop casting of Cu3(HITP)2 dispersions function as reversible chemiresistive sensors, capable of detecting sub-ppm levels of ammonia vapor. Comparison with the isostructural 2D MOF Ni3(HITP)2 shows that the copper sites are critical for ammonia sensing, indicating that rational design/synthesis can be used to tune the functional properties of conductive MOFs.
金属-有机骨架（MOFs）作为电子设备中的功能材料，其导电性一直受到限制，目前还没有显示出高导电性的 MOFs。在这里，我们报告了一种新型导电 2D MOF，Cu3（HITP）2（HITP=2,3,6,7,10,11-六亚甲基三苯并三嗪）的合成，其体电导率为 0.2 S cm-1（压片，两点探针）。通过简单的滴铸 Cu3（HITP）2 分散体制备的器件可用作可逆的化学电阻传感器，能够检测亚 ppm 级别的氨蒸气。与同构的 2D MOF Ni3（HITP）2 的比较表明，铜位对于氨传感至关重要，这表明可以通过合理的设计/合成来调节导电 MOFs 的功能特性。
