📚 Reference InformationTitle: Novel barbituric acid-fused acridine-based hydrogel AIE fluorescent sensor for ultrasensitive on-site detection and efficient removal of hydrazine in gaseous and water environmentsAuthors: Yue Gu, Shuai Gong, Mengdi Zhao et al. (2025)Journal: Sensors and Actuators: B. Chemical
🔍 Core Issues
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Research Objective: To develop a fluorescent hydrogel sensor that integrates detection and adsorption functions for rapid, on-site monitoring and removal of hydrazine (N₂H₄) in the environment.
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Existing Limitations: Hydrazine is toxic, flammable, and explosive; traditional detection methods pose operational risks and struggle to achieve rapid on-site response and adsorption removal.
🚀 Innovations
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AIE Probe TABF-BA: Constructed from camphor-derived acridine and barbituric acid derivatives, exhibiting significant aggregation-induced emission (AIE) characteristics with a detection limit as low as 25 nM.
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Multifunctional Hydrogel Sensor: The probe is embedded in agarose hydrogel, enabling on-site detection and simultaneous adsorption of liquid and gaseous hydrazine, with a rapid response time of within 5 minutes.
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Portable Detection Platform: Combined with smartphone RGB analysis, a quantitative relationship between fluorescent signal and hydrazine concentration is established, supporting on-site detection across a wide concentration range (0–1000 μM).
📊 Research Methods
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Probe Design: Synthesis of three AIE probes (TABF-BA/BMA/BSA), with verification of their substitution reaction mechanisms with hydrazine through spectroscopy and DFT calculations.
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Hydrogel Construction: Uniform dispersion of TABF-BA in agarose hydrogel, assessing its stability, adsorption capacity, and fluorescent response performance.
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Application Validation:
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Environmental Samples: Detection of hydrazine content in actual samples such as Yangtze River water and tea, with recovery rates reaching 97.25%–119.10%.
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Biological Imaging: Visualization of hydrazine detection in HeLa cells and Arabidopsis roots.
✅ Key Results
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Sensitivity and Selectivity: The detection limit of TABF-BA for hydrazine is 25 nM, with no interference from various ions and amino acids present.
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Hydrogel Adsorption Capacity: 1 cm³ of hydrogel can reduce hydrazine concentration in water samples from 124 mg/L to 101 mg/L.
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Gaseous Detection: Exhibits good linear response for gaseous hydrazine (R² = 0.9852).
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Biocompatibility: The probe is non-toxic to cells at a concentration of 50 μM, suitable for in vivo imaging.
📌 DisclaimerThis article is an academic interpretation and not the original content. Please refer to the original literature:DOI: https://doi.org/10.1016/j.snb.2025.139106
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