Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture Resistance
Abstract Organic molecules with tailorable chemical structures, high stability, and solution processability have great potential in the sensing field. Compared with p‐type organic small molecules (OSMs), the electron‐dominated n‐type analogs show superior conductivity when exposed to reducing gases,...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202409890 |
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| author | Binbin Wang Yali Xing Kewei Zhang Zhong Wang Yanzhi Xia Xiaojing Long |
| author_facet | Binbin Wang Yali Xing Kewei Zhang Zhong Wang Yanzhi Xia Xiaojing Long |
| author_sort | Binbin Wang |
| collection | DOAJ |
| description | Abstract Organic molecules with tailorable chemical structures, high stability, and solution processability have great potential in the sensing field. Compared with p‐type organic small molecules (OSMs), the electron‐dominated n‐type analogs show superior conductivity when exposed to reducing gases, which can achieve outstanding sensor signal‐to‐noise ratios. However, inadequate humidity resistance at room temperature hinders the development of such molecules. Herein, an A‐D‐π‐D‐A molecular design strategy is proposed based on electron‐deficient B←N units, which results in effective intramolecular charge transport and sensitive responses by extending the π‐conjugation bridge. As a result, the ST‐2BP with A‐D‐π‐D‐A configuration shows a prominent sensitivity of 787 (Ra/Rg) in 20 ppm NH3 at room temperature and an almost initial and stable response under different relative humidity conditions, which is the highest among currently reported OSM sensors. Supported by theoretical calculations and in situ FTIR spectra, it is revealed that B←N units, which function as the active centers mediate the specific ammonia adsorption. This study provides a new understanding of the design of high‐performance room temperature gas sensing materials by decorating B←N units. |
| format | Article |
| id | doaj-art-08fca38be19a4fb4bbe7599318ad0b5c |
| institution | DOAJ |
| issn | 2198-3844 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-08fca38be19a4fb4bbe7599318ad0b5c2025-08-20T02:43:28ZengWileyAdvanced Science2198-38442024-12-011148n/an/a10.1002/advs.202409890Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture ResistanceBinbin Wang0Yali Xing1Kewei Zhang2Zhong Wang3Yanzhi Xia4Xiaojing Long5State Key Laboratory of Bio‐fibers and Eco‐textiles Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles Institute of Marine Biobased Materials College of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. ChinaState Key Laboratory of Bio‐fibers and Eco‐textiles Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles Institute of Marine Biobased Materials College of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. ChinaState Key Laboratory of Bio‐fibers and Eco‐textiles Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles Institute of Marine Biobased Materials College of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. ChinaQingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 P. R. ChinaState Key Laboratory of Bio‐fibers and Eco‐textiles Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles Institute of Marine Biobased Materials College of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. ChinaState Key Laboratory of Bio‐fibers and Eco‐textiles Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles Institute of Marine Biobased Materials College of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. ChinaAbstract Organic molecules with tailorable chemical structures, high stability, and solution processability have great potential in the sensing field. Compared with p‐type organic small molecules (OSMs), the electron‐dominated n‐type analogs show superior conductivity when exposed to reducing gases, which can achieve outstanding sensor signal‐to‐noise ratios. However, inadequate humidity resistance at room temperature hinders the development of such molecules. Herein, an A‐D‐π‐D‐A molecular design strategy is proposed based on electron‐deficient B←N units, which results in effective intramolecular charge transport and sensitive responses by extending the π‐conjugation bridge. As a result, the ST‐2BP with A‐D‐π‐D‐A configuration shows a prominent sensitivity of 787 (Ra/Rg) in 20 ppm NH3 at room temperature and an almost initial and stable response under different relative humidity conditions, which is the highest among currently reported OSM sensors. Supported by theoretical calculations and in situ FTIR spectra, it is revealed that B←N units, which function as the active centers mediate the specific ammonia adsorption. This study provides a new understanding of the design of high‐performance room temperature gas sensing materials by decorating B←N units.https://doi.org/10.1002/advs.202409890ammonia sensingelectron‐deficient B←N unitextended A‐D‐π‐D‐Amodulated energy bandgapn‐type organic small molecules |
| spellingShingle | Binbin Wang Yali Xing Kewei Zhang Zhong Wang Yanzhi Xia Xiaojing Long Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture Resistance Advanced Science ammonia sensing electron‐deficient B←N unit extended A‐D‐π‐D‐A modulated energy bandgap n‐type organic small molecules |
| title | Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture Resistance |
| title_full | Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture Resistance |
| title_fullStr | Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture Resistance |
| title_full_unstemmed | Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture Resistance |
| title_short | Electron‐Deficient Organic Molecules Based on B←N Unit: A N‐Type Room‐Temperature Chemiresistive Sensors with Moisture Resistance |
| title_sort | electron deficient organic molecules based on b n unit a n type room temperature chemiresistive sensors with moisture resistance |
| topic | ammonia sensing electron‐deficient B←N unit extended A‐D‐π‐D‐A modulated energy bandgap n‐type organic small molecules |
| url | https://doi.org/10.1002/advs.202409890 |
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