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Updated: Jun 21, 2026
05:46
High-pressure Sapphire Cell for Phase Equilibria Measurements of CO2/Organic/Water Systems
Published on: January 24, 2014
Co(0.50)VOPO(4).2H2O
Lianxia Meng1, Yuping Ma, Xiaoliang Zhang
1Institute of Chemistry for Functionalized Materials, College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, People's Republic of China.
Summary
Cobalt vanadophosphate dihydrate forms a unique 3D framework of VO5, PO4, and Co octahedra. This open framework, crucial for its structure, collapses when water molecules are removed.
Area of Science:
- Inorganic Chemistry
- Crystal Engineering
- Materials Science
Background:
- Vanadophosphates are known for diverse structural motifs.
- Hydrated metal phosphates often exhibit interesting framework properties.
Purpose of the Study:
- To determine the crystal structure of cobalt vanadophosphate dihydrate.
- To understand the assembly of its three-dimensional framework.
- To investigate the role of water molecules in structural integrity.
Main Methods:
- Single-crystal X-ray diffraction was used to elucidate the crystal structure.
- Powder diffraction was employed to study structural changes upon dehydration.
Main Results:
- The crystal structure reveals a 3D framework built from VO5 square pyramids, PO4 tetrahedra, and Co octahedra.
- The framework features planar P-V-O layers linked by [Co(H2O)4]2+ cations.
- Powder diffraction confirmed that the framework collapses upon removal of water molecules.
Conclusions:
- Cobalt vanadophosphate dihydrate possesses an unprecedented 3D open framework.
- The coordinated water molecules are essential for maintaining the structural integrity of the framework.
- Dehydration leads to a structural collapse, indicating potential applications in responsive materials.
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