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A Closed-Type Wireless Nanopore Electrode for Analyzing Single Nanoparticles

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Switchable Aromatic Nanopore Structures: Functions and Applications.

Mo Sun¹, Myongsoo Lee¹

¹Department of Chemistry, Fudan University, Shanghai 200438, China.

Accounts of Chemical Research

|July 2, 2021

Summary

This summary is machine-generated.

Researchers developed switchable aromatic nanopore structures by integrating oligo(ethylene oxide) dendrons into aromatic building blocks. These adaptable nanostructures exhibit reversible pore deformation, enabling complex functions mimicking biological systems.

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Area of Science:

Supramolecular chemistry
Nanotechnology
Materials science

Background:

Nature utilizes nanopore structures for critical functions like transport and catalysis.
Synthetic nanopores often have fixed structures, limiting adaptability to environmental changes.
Oligo(ethylene oxide) dendrons offer conformational flexibility responsive to external stimuli.

Purpose of the Study:

To design and develop switchable nanopore structures through self-assembly.
To investigate the adaptable regulation of nanopore properties in response to environmental changes.
To explore complex functions achievable with dynamic nanopore assemblies.

Main Methods:

Self-assembly of rigid aromatic amphiphiles grafted with hydrophilic oligo(ethylene oxide) dendrons in aqueous media.
Integration of dendritic chains into aromatic building blocks to induce conformational changes.
Characterization of nanostructure formation (tubules, toroids, sheets) and pore switching behavior.

Main Results:

Successfully generated switchable aromatic nanopore structures with tunable shapes (tubules, toroids, sheets).
Demonstrated reversible pore deformation (closing, squeezing, shape change) triggered by external stimuli (temperature, pH, salts).
Observed stimuli-induced helical polymerization in toroidal structures and complex functions like DNA helicity inversion and enzymatic action.

Conclusions:

Aromatic nanopore structures with switchable properties can be created by incorporating oligoether chains.
These dynamic nanostructures offer adaptable functions surpassing fixed-pore systems.
Understanding the chemical principles of dynamic motion allows for the creation of emergent nanopore functions comparable to biological systems.