Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework
A growing demand for indoor atmosphere monitoring relies critically on the ability to reliably and quantitatively detect carbon dioxide. Widespread adoption of CO2 sensors requires vastly improved materials and approaches because selective sensing of CO2 under ambient conditions, where relative humi...
| मुख्य लेखकों: | , , , |
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| अन्य लेखक: | |
| स्वरूप: | लेख |
| भाषा: | English |
| प्रकाशित: |
American Chemical Society (ACS)
2020
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| ऑनलाइन पहुंच: | https://hdl.handle.net/1721.1/125405 |
| _version_ | 1826204710022938624 |
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| author | Stassen, Ivo Dou, Jinhu Hendon, Christopher Dinca, Mircea |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Stassen, Ivo Dou, Jinhu Hendon, Christopher Dinca, Mircea |
| author_sort | Stassen, Ivo |
| collection | MIT |
| description | A growing demand for indoor atmosphere monitoring relies critically on the ability to reliably and quantitatively detect carbon dioxide. Widespread adoption of CO2 sensors requires vastly improved materials and approaches because selective sensing of CO2 under ambient conditions, where relative humidity (RH) and other atmosphere contaminants provide a complex scenario, is particularly challenging. This report describes an ambient CO2 chemiresistor platform based on nanoporous, electrically conducting two-dimensional metal-organic frameworks (2D MOFs). The CO2 chemiresistive sensitivity of 2D MOFs is attained through the incorporation of imino-semiquinonate moieties, i.e., well-defined N-heteroatom functionalization. The best performance is obtained with Cu3(hexaiminobenzene)2, Cu3HIB2, which shows selective and robust ambient CO2 sensing properties at practically relevant levels (400-2500 ppm). The observed ambient CO2 sensitivity is nearly RH-independent in the range 10-80% RH. Cu3HIB2 shows higher sensitivity over a broader RH range than any other known chemiresistor. Characterization of the CO2-MOF interaction through a combination of in situ optical spectroscopy and density functional theory calculations evidence autogenously generated hydrated adsorption sites and a charge trapping mechanism as responsible for the intriguing CO2 sensing properties of Cu3HIB2. Keywords: Sensors; Adsorption; Metal organic frameworks; Electrical conductivity; Materials |
| first_indexed | 2024-09-23T12:59:48Z |
| format | Article |
| id | mit-1721.1/125405 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:59:48Z |
| publishDate | 2020 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1254052022-10-01T12:25:27Z Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework Stassen, Ivo Dou, Jinhu Hendon, Christopher Dinca, Mircea Massachusetts Institute of Technology. Department of Chemistry A growing demand for indoor atmosphere monitoring relies critically on the ability to reliably and quantitatively detect carbon dioxide. Widespread adoption of CO2 sensors requires vastly improved materials and approaches because selective sensing of CO2 under ambient conditions, where relative humidity (RH) and other atmosphere contaminants provide a complex scenario, is particularly challenging. This report describes an ambient CO2 chemiresistor platform based on nanoporous, electrically conducting two-dimensional metal-organic frameworks (2D MOFs). The CO2 chemiresistive sensitivity of 2D MOFs is attained through the incorporation of imino-semiquinonate moieties, i.e., well-defined N-heteroatom functionalization. The best performance is obtained with Cu3(hexaiminobenzene)2, Cu3HIB2, which shows selective and robust ambient CO2 sensing properties at practically relevant levels (400-2500 ppm). The observed ambient CO2 sensitivity is nearly RH-independent in the range 10-80% RH. Cu3HIB2 shows higher sensitivity over a broader RH range than any other known chemiresistor. Characterization of the CO2-MOF interaction through a combination of in situ optical spectroscopy and density functional theory calculations evidence autogenously generated hydrated adsorption sites and a charge trapping mechanism as responsible for the intriguing CO2 sensing properties of Cu3HIB2. Keywords: Sensors; Adsorption; Metal organic frameworks; Electrical conductivity; Materials Army Research Office (Grant W911NF-17-1-0174) 2020-05-22T13:28:34Z 2020-05-22T13:28:34Z 2019-06 2019-05 2019-12-17T14:35:50Z Article http://purl.org/eprint/type/JournalArticle 2374-7943 2374-7951 https://hdl.handle.net/1721.1/125405 Stassen, Ivo et al. "Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework." ACS Central Science 5, 8 (August 2019): 1425–1431 ©2019 American Chemical Society. en https://dx.doi.org/10.1021/acscentsci.9b00482 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) ACS |
| spellingShingle | Stassen, Ivo Dou, Jinhu Hendon, Christopher Dinca, Mircea Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework |
| title | Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework |
| title_full | Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework |
| title_fullStr | Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework |
| title_full_unstemmed | Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework |
| title_short | Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework |
| title_sort | chemiresistive sensing of ambient co2 by an autogenously hydrated cu3 hexaiminobenzene 2 framework |
| url | https://hdl.handle.net/1721.1/125405 |
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