Bionic Luminescent Sensors Based on Covalent Organic Frameworks: Auditory, Gustatory, and Olfactory Information Monitoring for Multimode PerceptionClick to copy article linkArticle link copied!
- Xueping QuanXueping QuanShanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, ChinaMore by Xueping Quan
- Kai ZhuKai ZhuShanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, ChinaMore by Kai Zhu
- Yinsheng LiuYinsheng LiuShanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, ChinaMore by Yinsheng Liu
- Bing Yan*Bing Yan*Email: [email protected]Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, ChinaMore by Bing Yan
Abstract

The synthesis of covalent organic frameworks (COFs) with excellent luminescent properties and their effective application in the field of bionic sensing remain a formidable challenge. Herein, a series of COFs with different numbers of hydroxyl groups are successfully synthesized, and the number of hydroxyl groups on the benzene-1,3,5-tricarbaldehyde (BTA) linker influences the properties of the final COFs. The COF (HHBTA-OH) prepared with hydrazine hydrate (HH) and BTA containing one hydroxyl group as the ligands exhibits the best fluorescent performance. MA@HHBTA-OH is formed by the reaction of HHBTA-OH with meldrum’s acid (MA) and has its extremely high hydrophilicity, dispersibility, and strong red fluorescence, which can imitate the human gustatory system to detect bitter substances. MA@HHBTA-OH was combined with agarose (AG) to construct a MA@HHBTA-OH@AG film for assessing food freshness. In addition, an acoustic MA@HHBTA-OH@MF sensor is fabricated by integrating luminescent MA@HHBTA-OH with melamine foam (MF) through a strong hydrogen bond. MA@HHBTA-OH@MF functions like an eardrum and recognizes sound through pressure waves with excellent mechanical sensing performance. In summary, biomimetic luminescent sensors based on MA@HHBTA-OH were successfully constructed, which can monitor auditory, gustatory, and olfactory information to achieve the multimode perception of sound, bitter substances, and food freshness.
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