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Luminescent Coordination Polymer with Extreme-Sensitive MnO4- and Acid-Sensing Capacity
Jinfang Zhang1, Jiamin Wang1, Shuaixing Wang1
1International Joint Research Center for Photoresponsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, P. R. China.
Inorganic Chemistry
|September 15, 2025
Summary
A novel luminescent coordination polymer (LCP) offers sensitive, dual detection of harmful permanganate (MnO4-) and acid. This material provides a new tool for environmental monitoring and safeguarding human health.
Area of Science:
- Materials Science
- Environmental Chemistry
- Analytical Chemistry
Background:
- Permanganate (MnO4-) and environmental acidification pose significant threats to ecosystems and human health.
- Simultaneous monitoring of MnO4- and acid levels is crucial for environmental protection.
- Development of advanced sensing materials is needed for accurate and sensitive detection.
Purpose of the Study:
- To synthesize and characterize a novel luminescent coordination polymer (LCP) for dual sensing applications.
- To investigate the LCP's stability and responsiveness to MnO4- and acid.
- To establish the sensing mechanisms and evaluate the performance of the developed sensor.
Main Methods:
- Synthesis of a carbazole-containing ligand (L) and its use in constructing a 1-D LCP, [Cd(L)I2·DMAC]n (1).
- Characterization of the LCP's structure, including its zigzag-like chain architecture and hydrogen-bonding interactions.
- Evaluation of the LCP's stability (water, pH, thermal) and its luminescent sensing capabilities for MnO4- and acid using single-emission and ratiometric fluorescence detection.
Main Results:
- The synthesized LCP, [Cd(L)I2·DMAC]n (1), exhibits excellent stability.
- The LCP demonstrates highly sensitive "turn-off" detection of MnO4- with a record low limit of detection (2.85 nM).
- The LCP shows a ratiometric fluorescence response to various acids, enabling naked-eye detection and achieving high sensitivity (800% per pH).
Conclusions:
- A novel 1-D LCP based on a carbazole ligand provides a highly sensitive and selective dual-responsive sensor for MnO4- and acid.
- This dual-responsive sensor, utilizing both single-emission and ratiometric fluorescence, represents a significant advancement in environmental monitoring technology.
- The findings highlight the potential of coordination polymers in developing sophisticated analytical tools for complex environmental challenges.
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