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Humidity-Triggered Reversible 0-1D Phase Transition in Hybrid Antimony Halides.

Yi Liu1,2,3, Jiahua Luo1,2,3, Abdusalam Ablez1,2,3

  • 1College of Chemistry, Fuzhou University, Fuzhou 350108, China.

Nanomaterials (Basel, Switzerland)
|March 26, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces novel antimony-based inorganic-organic hybrid metal halides that change structure with humidity. This transformation enables sensitive fluorescence-based water detection.

Keywords:
fluorescent sensorhumidity sensitive materialinorganic–organic hybrid metal halidesstructural dimensionality changetrace water detection

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Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Stimulus-responsive inorganic-organic hybrid metal halides (IOMHs) are promising for sensing and anti-counterfeiting applications.
  • Humidity-induced structural changes in IOMHs are known, but dimensionality changes are rarely reported.

Purpose of the Study:

  • To synthesize and characterize two antimony-based IOMHs: 0D-(Mp)3SbCl6·MeCN and 1D-(Mp)2SbCl5.
  • To investigate the humidity-induced structural dimensionality change from 0D to 1D and its effect on photophysical properties.

Main Methods:

  • Synthesis of antimony-based IOMHs.
  • Photophysical characterization (emission spectra, quantum yield).
  • X-ray powder diffraction, Raman spectroscopy, and thermogravimetric analysis to confirm phase transitions.

Main Results:

  • 0D-(Mp)3SbCl6·MeCN exhibits strong broadband emission (peak at 620 nm, 75.06% quantum yield) due to self-trapped excitons.
  • Humidity triggers a reversible phase transition from 0D-(Mp)3SbCl6·MeCN to 1D-(Mp)2SbCl5, causing fluorescence quenching.
  • The material demonstrated sensitive water detection in tetrahydrofuran with a 0.2% v/v detection limit.

Conclusions:

  • The synthesized IOMHs exhibit a rare 0D to 1D structural dimensionality change upon hydration.
  • The distinct fluorescence change associated with this phase transition makes the material suitable for fluorescence water sensing.
  • This work expands the understanding of IOMH structural dynamics and their application in sensing.