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In Vitro and In Live-Cell Rapid Hydrazine Detection by Disaggregation of the AIEgen Microstructure.

Surajit Singh1, Pradip Kumar Hansda1, Suman Das1

  • 1Department of chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, 741246, India.

Chemistry, an Asian Journal
|May 27, 2025
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Summary

Researchers developed novel hydrazine detectors using aggregation-induced emission (AIE) molecules. The SB3 AIEgen showed high sensitivity for detecting hydrazine in aqueous solutions and within cells, enabling real-time environmental and biomedical monitoring.

Keywords:
AIEgenDisaggregationHydrazine detectionLive‐cell imagingMicrostructure

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Biomedical Engineering

Background:

  • Aggregation-induced emission (AIE) phenomena offer unique optical properties for sensing applications.
  • Developing sensitive and specific hydrazine detectors is crucial for environmental safety and biomedical diagnostics.
  • 2,4,6-triphenylaniline derivatives provide a versatile scaffold for designing AIEgens with tunable properties.

Purpose of the Study:

  • To design and synthesize novel 2,4,6-triphenylaniline-based AIEgens (SB1, SB2, SB3).
  • To investigate the aggregation behavior and aggregation-induced emission (AIE) properties of these AIEgens.
  • To develop efficient hydrazine detectors based on the disaggregation of AIEgen microstructures.

Main Methods:

  • Synthesis of 2,4,6-triphenylaniline-based AIEgens (SB1, SB2, SB3).
  • Spectroscopic (e.g., fluorescence) and microscopic techniques to study aggregation and disaggregation.
  • Modulation of water content in acetonitrile solutions to control aggregation states.
  • Evaluation of hydrazine detection limits and specificity in aqueous and cellular environments.

Main Results:

  • SB1, SB2, and SB3 exhibited tunable AIE properties upon self-assembly in aqueous and physiological conditions.
  • The SB3 AIEgen demonstrated exceptional sensitivity for hydrazine detection with a limit of 0.054 µM.
  • Hydrogen bond-induced disaggregation of SB3 aggregates led to a significant turn-on fluorescence response via intramolecular charge transfer (ICT).
  • SB3 successfully permeated cell membranes for specific intracellular hydrazine detection.

Conclusions:

  • Novel 2,4,6-triphenylaniline-based AIEgens were successfully developed for hydrazine sensing.
  • The SB3 derivative serves as a highly sensitive and specific fluorescent probe for both environmental and intracellular hydrazine.
  • This work presents promising on-site, real-time fluorogenic detection methods for environmental monitoring and biomedical imaging.