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Polymersome-Based Modular Nanoreactors with Size-Selective Transmembrane Permeability.

Junyoung Kim¹, Kyoung Taek Kim¹

¹Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.

ACS Applied Materials & Interfaces

|April 23, 2020

Summary

This summary is machine-generated.

Researchers developed stimuli-responsive polymersomes for controlled chemical reactions. These nanoreactors offer tunable permeability, protecting encapsulated catalysts and enabling size-selective transport for efficient one-pot synthesis of complex molecules.

Keywords:

Polymer nanocapsules modular reactor permeability polymersomes

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Area of Science:

Polymer chemistry
Nanotechnology
Biochemistry

Background:

Polymersome nanoreactors offer potential for cascade reactions in modular reactors.
Tunable membrane permeability is crucial for reagent transport and catalyst protection.
Stimuli-responsive materials are needed to control polymersome function.

Purpose of the Study:

To develop a stimuli-responsive method for controlling polymersome membrane permeability.
To enable size-selective transport for encapsulated catalysts and products.
To demonstrate the use of these polymersomes in one-pot synthesis via cascade reactions.

Main Methods:

Synthesized polymersomes from a binary blend of PEG-b-PS and PEG-b-PABB.
Utilized hydrogen peroxide (H2O2) to trigger the oxidation of PABB to PAA, altering membrane properties.
Controlled membrane permeability by adjusting the blend composition (PEG-b-PS/PEG-b-PABB ratios).
Assessed size-selective release of fluorescent molecules (fluorescein, PEG2k-Cm, PEG5k-Rho).

Main Results:

H2O2 triggered the transformation of PEG-b-PABB to PEG-b-PAA, leading to membrane perforation.
Polymersome composition tuning (100/0-80/20 PEG-b-PS/PEG-b-PABB) allowed size-selective permeability without structural loss.
Encapsulated enzymes were protected from external proteases, facilitating one-pot synthesis.
Nanoparticular catalysts were successfully encapsulated and utilized in cascade reactions.

Conclusions:

Developed a novel stimuli-responsive system for tunable polymersome permeability.
Demonstrated the potential of these polymersomes as modular nanoreactors for complex synthesis.
Showcased the protection of encapsulated catalysts and efficient cascade reactions in a one-pot system.