New lanthanide(iii) coordination polymers: synthesis, structural features, and catalytic activity in CO₂ fixation

Area of Science:

• Materials Chemistry
• Catalysis
• Supramolecular Chemistry

Background:

• Lanthanide coordination polymers offer tunable structures and properties.
• Developing efficient heterogeneous catalysts for CO2 utilization is crucial.

Purpose of the Study:

• To synthesize and characterize novel lanthanide coordination polymers.
• To evaluate their catalytic activity in the cycloaddition of CO2 to halogenated propylene oxides.

Main Methods:

• Solothermal synthesis of coordination polymers.
• Single-crystal X-ray diffraction for structural analysis.
• Heterogeneous catalysis for cycloaddition reactions.

Main Results:

• Isomorphous 1D cationic double chains with encapsulated halide anions were formed.
• The coordination polymers exhibited high thermal stability.
• Catalysts achieved up to 98% yield in cyclic carbonate formation with high TONs and TOFs.
• Catalyst recyclability up to eight times was demonstrated.

Conclusions:

• The synthesized lanthanide coordination polymers are effective heterogeneous catalysts.
• These materials demonstrate potential for sustainable CO2 utilization and synthesis of cyclic carbonates.