Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 19, Pages 10806-10813Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202100717
Keywords
conducting materials; conjugated polymers; covalent organic frameworks; metal– organic frameworks; porous polymers
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Funding
- Zhejiang University
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001015]
- RobertA. Welch Foundation through a Welch Endowed Chair [A-0030]
- National Science Foundation Graduate Research Fellowship [DGE:1252521]
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This study demonstrates the potential of metallophthalocyanine-based conductive frameworks in advanced stand-off chemical sensors, showing high electrical conductivity and sensitivity in detecting low-concentration gases. The fabrication of thin films with different thicknesses also highlights the general strategy of tailor-made molecular design for developing sensitive and stable chemical sensors.
The poor electrical conductivity of two-dimensional (2D) crystalline frameworks greatly limits their utilization in optoelectronics and sensor technology. Herein, we describe a conductive metallophthalocyanine-based NiPc-CoTAA framework with cobalt(II) tetraaza[14]annulene linkages. The high conjugation across the whole network combined with densely stacked metallophthalocyanine units endows this material with high electrical conductivity, which can be greatly enhanced by doping with iodine. The NiPc-CoTAA framework was also fabricated as thin films with different thicknesses from 100 to 1000 nm by the steam-assisted conversion method. These films enabled the detection of low-concentration gases and exhibited remarkable sensitivity and stability. This study indicates the enormous potential of metallophthalocyanine-based conductive frameworks in advanced stand-off chemical sensors and provides a general strategy through tailor-make molecular design to develop sensitive and stable chemical sensors for the detection of low-concentration gases.
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