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Modular Assembly of Isostructural Mixed-Ligand Uranyl Coordination Polymers Based on a Patterning Strategy
Jun-Shan Geng1,2, Wen Feng1, Jie Li2
1Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, College of Chemistry, Sichuan University, Chengdu 610064, China.
Inorganic Chemistry
|July 5, 2022
Summary
This study introduces a patterning strategy for creating tunable uranyl coordination polymers (CPs) with ladder-like structures. These materials exhibit potential for selective metal ion detection, showcasing controlled assembly for functional solid-state materials.
Area of Science:
- Materials Science
- Coordination Chemistry
- Nanotechnology
Background:
- Controlling the assembly of molecular building blocks is crucial for designing solid-state materials with specific properties.
- Uranyl-based coordination polymers (CPs) offer a versatile platform for creating functional materials.
- Developing strategies for modular assembly and structural regulation of CPs is an ongoing challenge.
Purpose of the Study:
- To propose and demonstrate a patterning strategy for the modular assembly and structural regulation of mixed-ligand uranyl coordination polymers.
- To synthesize and characterize novel isostructural uranyl coordination polymers using complementary organic ligands.
- To investigate the influence of structural variations on ion-exchange properties and sensing capabilities.
Main Methods:
- Utilized a combination of 5-(p-tolyldiazenyl)isophthalic acid (H2ptdi) and various rigid linear dicarboxylic acid linkers.
- Synthesized five novel isostructural uranyl coordination polymers with ladder-like architectures.
- Characterized the synthesized compounds using techniques including X-ray powder diffraction (PXRD), thermogravimetric analysis, infrared spectroscopy, luminescence spectroscopy, elemental analysis, and UV-Vis spectroscopy.
Main Results:
- Successfully synthesized five isostructural uranyl coordination polymers (1-5) with defined ladder-like structures.
- The varying lengths and widths of the dicarboxylic acid linkers resulted in different nanochannel sizes and interlayer spacings.
- The synthesized frameworks exhibited varying performance in Eu3+ ion exchange, correlating with interlayer spacing.
- Compound 3 demonstrated selective detection of Fe3+ ions in aqueous solutions due to its strong fluorescence.
Conclusions:
- The proposed patterning strategy enables effective regulation of modular synthesis for functional coordination polymers.
- The study enriches the library of uranyl-based coordination polymers with diverse structures and functionalities.
- The developed materials show promise for applications in selective metal ion sensing.
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