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An Organodiphosphate-Containing Polyoxoniobate Ring and Its Assembly into a Three-Dimensional Framework through
Yu-Chen Cong1, Hui-Ping Xiao1, Ping-Wei Cai1
1Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
Inorganic Chemistry
|May 3, 2024
Summary
A novel organodiphosphate-containing polyoxoniobate (PONb) ring was synthesized and assembled into a 3D framework. This material exhibits high water vapor adsorption and proton conductivity, offering potential for new functional materials.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Supramolecular Chemistry
Background:
- Polyoxoniobates (PONbs) are versatile inorganic-organic hybrid materials with diverse structures and properties.
- Organodiphosphate ligands offer opportunities for tuning the assembly and functionality of PONb clusters.
- Developing novel PONb-based materials with enhanced performance for applications like adsorption and proton conduction is an active research area.
Purpose of the Study:
- To synthesize a novel organodiphosphate-containing PONb ring structure.
- To construct a three-dimensional supramolecular framework using the synthesized PONb ring.
- To investigate the water vapor adsorption capacity and proton conductivity of the resulting material.
Main Methods:
- One-pot hydrothermal synthesis of the organodiphosphate-containing PONb ring.
- Self-assembly of the ring into 1D chains and subsequently a 3D supramolecular framework using K-H2O clusters and Cu(en)2 complexes.
- Characterization of the material's structure, chemical and thermal stability, water vapor adsorption, and proton conductivity via impedance measurements.
Main Results:
- A novel organodiphosphate-containing PONb ring, {(PO3CH2CH2PO3H)4Nb8O16}4- (NbP), was successfully synthesized.
- A 3D supramolecular framework, {[Cu(en)2]2[K2(H2O)4(OH)2]NbP}·3en·H2O (1), was constructed.
- Material 1 demonstrated excellent chemical and thermal stability, a high water vapor adsorption capacity (≤224 cm3 g-1), and moderate proton conductivity.
Conclusions:
- The study successfully synthesized a new organodiphosphate-containing PONb ring and assembled it into a stable 3D framework.
- The resulting material exhibits superior water vapor adsorption capabilities compared to many existing polyoxometalate-based materials.
- This work expands the structural diversity of organodiphosphate-containing PONbs and provides a promising platform for developing advanced functional materials.
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