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Isopolymolybdate-Based Cobalt/Nickel Coordination Polymers Constructed by V-Type N-Donor Ligands
Ya-Jie Shi1, Lin-Lin Chen1, Ying Liu1
1Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
Inorganic Chemistry
|January 5, 2021
Summary
Four novel coordination polymers (CPs) based on isopolymolybdates were synthesized. These CPs exhibit diverse structures and magnetic properties, with one showing promising proton conductivity.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Crystallography
Background:
- Coordination polymers (CPs) are advanced materials with tunable properties.
- Isopolymolybdates are versatile building blocks for constructing complex frameworks.
- The integration of organic ligands with polyoxometalates offers opportunities for novel material design.
Purpose of the Study:
- To synthesize and characterize novel isopolymolybdate-based coordination polymers.
- To investigate the structural diversity and topological properties of the synthesized CPs.
- To explore the magnetic behaviors and proton conductivity of these new materials.
Main Methods:
- Hydrothermal synthesis was employed to construct four novel coordination polymers.
- Single-crystal X-ray diffraction was used to determine the detailed crystal structures and topologies.
- Magnetic susceptibility measurements and proton conductivity tests were conducted.
Main Results:
- Four distinct coordination polymers were successfully synthesized using 2,6-bis(1,2,4-triazol-1-yl)pyridine (btp), 1,3-bis(4H-1,2,4-triazol-4-yl)benzene (btb), and 3,5-bis(1-imidazolium)pyridine (bip) ligands with isopolymolybdates.
- The resulting CPs exhibit diverse structural architectures, including 3D frameworks with unique topological nets (e.g., 3-nodal 2,4,6-c and 4,6-c fsc) and 2D layered structures.
- Magnetic studies revealed varied magnetic behaviors: antiferromagnetism in complexes 1 and 4, spin-canting in complex 2, and metamagnetism in complex 3. Complex 4 demonstrated good proton conductivity at 85 °C and 98% relative humidity.
Conclusions:
- The hydrothermal method enables the construction of complex coordination polymers with diverse isopolymolybdate clusters and organic linkers.
- The synthesized CPs display unique structural topologies and intriguing magnetic properties.
- Complex 4 shows potential for applications in proton-conducting materials, particularly under humid conditions.
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