Self-Assembly of a [1 + 1] Ionic Hexagonal Macrocycle and Its Antiproliferative Activity

Area of Science:

• Supramolecular Chemistry
• Organometallic Chemistry
• Materials Science

Background:

• Self-assembly is a key strategy for creating complex molecular architectures.
• Metallamacrocycles offer unique structural and functional properties.

Purpose of the Study:

• To synthesize a novel, discrete hexagonal metallamacrocycle using an organic donor clip and an organometallic acceptor clip.
• To characterize the self-assembled structure and evaluate its cytotoxicity.

Main Methods:

• Self-assembly of organic donor and organometallic acceptor clips.
• Characterization using multinuclear NMR, mass spectrometry, and elemental analysis.
• Molecular modeling to confirm structure.
• Cytotoxicity assays on three cancer cell lines.

Main Results:

• A unique irregular hexagonal metallamacrocycle was successfully self-assembled from two building blocks.
• Molecular modeling confirmed a hexagonal cavity.
• The platinum(II)-based metallamacrocycle exhibited enhanced cytotoxicity against cancer cell lines compared to cisplatin.
• Metallamacrocycle formation positively impacted cell growth inhibition.

Conclusions:

• The study presents a novel discrete hexagonal framework metallamacrocycle.
• The self-assembled metallamacrocycle demonstrates promising anticancer properties.
• This work highlights the potential of metallamacrocycles in drug development.