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Core-Shell Structured Layered Lanthanide-Organic Complexes with Stilbazolium-type Dye Encapsulation for
Li-Ming Zhao1, Xia-Qiang Shen1, Qian Liu1
1College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China.
Chemistry, an Asian Journal
|November 22, 2019
Summary
Functional organic dyes encapsulated in lanthanide metal-organic frameworks create new materials. These composites show enhanced luminescence sensing for Fe3+ and improved water stability, offering a versatile platform for advanced applications.
Area of Science:
- Materials Science
- Coordination Chemistry
- Nanotechnology
Background:
- Host-guest encapsulation of organic dyes into metal-organic frameworks (MOFs) yields novel functional materials.
- Lanthanide layered metal-organic complexes (Ln-LMOCs) offer unique structural and luminescent properties.
- Stilbazolium dyes are known for their optical properties and potential in sensing applications.
Purpose of the Study:
- To prepare and characterize novel responsive (DEAST)I@Ln-LMOC composites by intercalating a stilbazolium-type dye into lanthanide layered metal-organic complexes.
- To investigate the luminescent sensing capabilities of these composites for detecting Fe3+ ions.
- To evaluate the enhanced water stability and other properties of the resulting composites.
Main Methods:
- Synthesis of four lanthanide layered metal-organic complexes (Ln-LMOCs) with the formula {[Ln(BTB)(H2O)2]·3(DMF)·2(H2O)}n, where Ln = La, Nd, Sm, Er.
- Intercalation of the stilbazolium-type dye (DEAST)I (4'-diethylamino-N-methyl stilbazolium) into the Ln-LMOCs to form (DEAST)I@Ln-LMOC composites.
- Comprehensive characterization using techniques such as IR, UV/Vis, PXRD, SEM, TEM, TGA, and ESR.
- Evaluation of luminescent sensing properties, water stability, ion conductivity, and photocurrent.
Main Results:
- Four (DEAST)I@Ln-LMOC composites with core-shell structures were successfully synthesized.
- The composites exhibited enhanced luminescent sensing for Fe3+ detection, attributed to fluorescence resonance energy transfer (FRET).
- Improved water stability was observed due to electrostatic interactions and reduced porosity.
- The characteristic emissions of Sm3+ remained unaffected by dye encapsulation, providing a basis for luminescence device modulation.
- Enhanced ion conductivity and diminished photocurrents were achieved after dye embedding.
Conclusions:
- The developed (DEAST)I@Ln-LMOC composites serve as a multifunctional platform with enhanced stability and sensing capabilities.
- The study demonstrates the potential of host-guest encapsulation for creating advanced functional materials with tailored properties.
- The findings offer insights into modulating luminescence devices and developing new sensing platforms.
Keywords:
Core-shell structuresEncapsulation of stilbazolium-type dyesHost-guest systemsLanthanide-organic complexesMultifunctional performancesMore Related Videos
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