Modification of Multi-Component Building Blocks for Assembling Giant Chiral Lanthanide-Titanium Molecular Rings

Area of Science:

• Coordination Chemistry
• Materials Science
• Supramolecular Chemistry

Background:

• Multi-component building blocks are crucial for complex molecular assembly but are scarce.
• Lanthanide-titanium (Ln-Ti) complexes offer potential for novel material synthesis.

Purpose of the Study:

• To modify existing Ln-Ti-SA building blocks for new functionalities.
• To investigate the assembly of modified blocks into complex structures.
• To explore the properties of the resulting molecular assemblies.

Main Methods:

• Chemical modification of multi-component building blocks using 5-methoxysalicylic acid (MSA).
• Self-assembly of modified blocks into chiral Ln-Ti rings.
• Characterization of the molecular structures and properties.

Main Results:

• Successfully synthesized new {Ln3Tix-MSA} building blocks (x=1, 2, 3).
• These blocks assembled into chiral Ln22Ti14 rings.
• Absence of Ti4+ resulted in linear Ln chains, highlighting Ti's role.
• The [Ti(MSA)3]2- unit induced chiral-sorting behavior.

Conclusions:

• The modification strategy enables the formation of versatile Ln-Ti building blocks.
• Chiral Ln-Ti rings with tunable properties were successfully constructed.
• The study demonstrates a pathway to complex supramolecular architectures with potential applications in electronics and optics.