Applications of porous metal–organic frameworks (MOFs) in electronic devices are rare, owing in large part to a lack of MOFs that display electrical conductivity. Here, we describe the use of conductive two-dimensional (2D) MOFs as a new class of materials for chemiresistive sensing of volatile organic compounds (VOCs). We demonstrate that a family of structurally analogous 2D MOFs can be used to construct a cross-reactive sensor array that allows for clear discrimination between different categories of VOCs. Experimental data show that multiple sensing mechanisms are operative with high degrees of orthogonality, establishing that the 2D MOFs used here are mechanistically unique and offer advantages relative to other known chemiresistor materials.Camille & Henry Dreyfus Foundation. Postdoctoral Program in Environmental ChemistrAlfred P. Sloan FoundationResearch Corporation for Science Advancement3M CompanyNational Science Foundation (U.S.). Graduate Research Fellowship Program (Grant 1122374)Massachusetts Institute of Technology. Institute for Soldier Nanotechnologie
