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Updated: Jun 17, 2026
05:47
Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Highly Efficient Manganese Bromides with Reversible Luminescence Switching through Amorphous-Crystalline Transition
Guang-Hsun Tan1, Hao-Cheng Lin1, Hao-Chi Liang2
1Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
ACS Applied Materials & Interfaces
|October 3, 2024
Summary
This study introduces novel manganese-based luminescent stimuli-responsive materials (LSRMs) as alternatives to rare-earth elements. These materials function as reusable time-temperature indicators and high-performance X-ray scintillators.
Area of Science:
- Materials Science
- Optoelectronics
- Solid-State Chemistry
Background:
- Luminescent stimuli-responsive materials (LSRMs) are crucial for optoelectronics, but reliance on rare-earth elements poses challenges.
- Developing earth-abundant LSRMs is essential for sustainable technological advancement.
Purpose of the Study:
- To demonstrate novel manganese-based LSRMs as alternatives to lanthanides.
- To explore their potential in applications such as time-temperature indicators and X-ray scintillators.
Main Methods:
- Synthesis and characterization of two chiral manganese halide compounds: (R-PEA)2MnBr4 and (S-PEA)2MnBr4.
- Investigating the reversible transition between amorphous (red-emissive) and crystalline (green-emissive) states via melt-quenching and annealing.
- Evaluating performance as a time-temperature indicator and X-ray scintillator.
Main Results:
- Successfully synthesized and demonstrated two manganese-based LSRMs, (R-PEA)2MnBr4 and (S-PEA)2MnBr4.
- Achieved a reversible transition between kinetically stable red-emissive amorphous and thermodynamically stable green-emissive crystalline states.
- Demonstrated a reusable manganese-halide-based time-temperature indicator and an X-ray scintillator with a low limit of detection (18.1 nGy/s) and high spatial resolution (30.0 lp/mm).
Conclusions:
- Manganese halides exhibit multifunctionality, offering a sustainable alternative to rare-earth-based materials.
- The demonstrated materials show promise for advanced applications in sensing and imaging.
- This work opens new avenues for research in earth-abundant luminescent materials.
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