A bis-phenolate for the construction of linear lanthanide trimers

Area of Science:

• Coordination Chemistry
• Lanthanide Chemistry
• Supramolecular Chemistry

Background:

• Calixarenes are well-established macrocyclic compounds with diverse applications.
• Lanthanide complexes are of interest due to their unique magnetic and luminescent properties.
• Developing new synthetic strategies for lanthanide clusters remains a challenge.

Purpose of the Study:

• To synthesize a novel linear trinuclear lanthanide (Ln3) complex.
• To investigate the utility of a flexible bis(phenol)methane ligand in constructing lanthanide assemblies.
• To explore the structural characteristics of the resulting Ln3 trimer.

Main Methods:

• Synthesis of the bis(5-tert-butyl-2-hydroxy-3-hydroxymethyl-phenyl)methane ligand.
• Self-assembly of the ligand with lanthanide ions (Ln3+) to form the trimer.
• Single-crystal X-ray diffraction analysis to determine the structure.

Main Results:

• An unusual linear [Ln3] trimer was successfully constructed.
• The flexible ligand adopted a conformation suitable for bridging three lanthanide ions.
• The crystal structure revealed a specific coordination environment around each lanthanide ion.

Conclusions:

• The flexible bis(phenol)methane ligand is effective for building linear lanthanide arrays.
• This work provides a new method for accessing discrete lanthanide trimers.
• The findings contribute to the understanding of lanthanide coordination chemistry and supramolecular assembly.