Postassembly Modification of Interior Spaces Within M₁₂L₂₄ Nanospheres

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Organic Synthesis

Background:

• Post assembly modification (PAM) has emerged as a key strategy in supramolecular chemistry over the last decade.
• PAM expands chemical diversity in supramolecular synthesis, enabling tailored functional materials.
• Existing methods for creating complex supramolecular structures can be limited in scope and efficiency.

Purpose of the Study:

• To apply post assembly modification (PAM) for the synthesis of M12L24 nanospheres with novel interior spaces.
• To introduce and utilize alkyl N-pyridinium carboxy aldehydes (ANCA) as an orthogonal functional group for PAM.
• To demonstrate the versatility of PAM in creating diverse confined environments within nanospheres.

Main Methods:

• Synthesis of M12L24 nanospheres as parent structures.
• Introduction of alkyl N-pyridinium carboxy aldehydes (ANCA) as a functional handle for modification.
• Quantitative post assembly modification (PAM) of nanospheres with various aniline derivatives.

Main Results:

• Successful creation of M12L24 nanospheres with unique and tunable interior spaces via PAM.
• Demonstration of quantitative PAM using ANCA with diverse aniline derivatives, yielding hydrophobic, chiral, and catalytic confined spaces.
• The parent nanospheres are easily characterized, facilitating efficient screening of secondary interactions and confined space properties.

Conclusions:

• PAM is a powerful and efficient methodology for generating multifunctional confined spaces within supramolecular nanostructures.
• The ANCA functional group provides an ideal platform for orthogonal PAM, enabling rapid diversification.
• This approach offers a fast and efficient tool for screening secondary interactions and exploring the properties of confined spaces.