Cu3(hexaiminotriphenylene)2: An Electrically Conductive 2D Metal-Organic Framework for Chemiresistive Sensing

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‐hexaiminotriphenyle...

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Published inAngewandte Chemie (International ed.) Vol. 54; no. 14; pp. 4349 - 4352
Main Authors Campbell, Michael G., Sheberla, Dennis, Liu, Sophie F., Swager, Timothy M., Dincă, Mircea
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 27.03.2015
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
EditionInternational ed. in English
Subjects
ammonia
conductivity
copper
metal-organic frameworks
sensors
ammonia
copper
sensors
conductivity
metal-organic frameworks
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Summary: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. A MOF with a nose: Previous efforts to use metal–organic frameworks (MOFs) for chemical sensing have been hindered by poor signal transduction due to a lack of electrical conductivity. A new conductive 2D MOF can be used for the chemiresistive sensing of ammonia. It is shown that the sensing response can be varied by the choice of the metal node.
Bibliography:Sloan Foundation
istex:CC9A77CBA1C5ADDE766362BF4DBD24327AA38C0E
Research Corporation for Science Advancement
U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences - No. DE-SC0001088
ArticleID:ANIE201411854
NSF - No. ECS-0335765
Synthetic and characterization work (excluding vapor sensing experiments) was supported as part of the Center for Excitonics, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under award number DE-SC0001088 (MIT). M.D. thanks the Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry for support of M.G.C. We thank Miller Li for assistance with acquiring SEM images and Lei Sun for helpful discussions. M.D. gratefully acknowledges early career support from the Sloan Foundation, the Research Corporation for Science Advancement (Cottrell Scholar), and 3M. S.F.L. and T.M.S. acknowledge support from a Graduate Research Fellowship under Grant No. 1122374, as well as the Army Research Office through the Institute for Soldier Nanotechnologies (sensing experiments). The SEM and XPS characterization data were obtained at the Harvard Center for Nanoscale Systems, which is supported by NSF Grant ECS-0335765.
Army Research Office
ark:/67375/WNG-G4Z7GM2X-C
Synthetic and characterization work (excluding vapor sensing experiments) was supported as part of the Center for Excitonics, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under award number DE‐SC0001088 (MIT). M.D. thanks the Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry for support of M.G.C. We thank Miller Li for assistance with acquiring SEM images and Lei Sun for helpful discussions. M.D. gratefully acknowledges early career support from the Sloan Foundation, the Research Corporation for Science Advancement (Cottrell Scholar), and 3M. S.F.L. and T.M.S. acknowledge support from a Graduate Research Fellowship under Grant No. 1122374, as well as the Army Research Office through the Institute for Soldier Nanotechnologies (sensing experiments). The SEM and XPS characterization data were obtained at the Harvard Center for Nanoscale Systems, which is supported by NSF Grant ECS‐0335765.
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ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201411854