Lanthanide metal-organic frameworks: searching for efficient solvent-free catalysts

Area of Science:

• Materials Science
• Inorganic Chemistry
• Catalysis

Background:

• Metal-organic frameworks (MOFs) are crystalline porous materials with diverse applications.
• Lanthanide-based MOFs are of particular interest due to their unique electronic and magnetic properties.
• Developing efficient catalysts for organic transformations, especially under solvent-free conditions, is crucial for sustainable chemistry.

Purpose of the Study:

• To synthesize and characterize novel 2D lanthanide-based metal-organic frameworks.
• To investigate the structural diversity and topological properties of these new MOFs.
• To evaluate the catalytic performance of the synthesized MOFs in cyanosilylation reactions.

Main Methods:

• Hydrothermal synthesis was employed to prepare three Ln-based 2D MOFs: [Ln(3,5-DSB)(Phen)] for Ln = La, Pr, Nd.
• Structural characterization was performed to determine their 2D structural types and net topologies.
• Catalytic activity was assessed for the cyanosilylation reaction under solvent-free conditions.

Main Results:

• Two distinct 2D structural types and different net topologies were identified among the synthesized MOFs.
• The La and Pr compounds are isostructural, featuring a uninodal 5-connected SP 2-periodic net (6,3).
• The Nd compound exhibits a binodal 3- and 6-connected kgd net.
• All three novel MOFs demonstrated excellent catalytic activities in the cyanosilylation reaction.

Conclusions:

• The successful synthesis of novel Ln-based 2D MOFs with diverse structures and topologies.
• The identified MOFs are effective heterogeneous catalysts for cyanosilylation reactions.
• These findings contribute to the development of advanced MOF materials for catalytic applications in green chemistry.