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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

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Published on: August 23, 2018

Multiple-responsive supramolecular vesicle based on azobenzene-cyclodextrin host-guest interaction.

Jiao Wang¹, Ting Wang¹, Xiaohui Liu¹

¹Department of Chemistry, Taiyuan Normal University Jinzhong 030619 China wangjiao@tynu.edu.cn.

|May 6, 2022

Summary

This summary is machine-generated.

Researchers created novel supramolecular vesicles using beta-cyclodextrin (β-CD) and a dual-responsive molecule. These pH and photo-responsive vesicles exhibit five distinct responses, showing promise for controlled release and drug delivery applications.

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Published on: April 22, 2016

Area of Science:

Supramolecular Chemistry
Materials Science
Nanotechnology

Background:

Designing responsive materials is crucial for advanced applications.
Supramolecular self-assembly offers a versatile platform for creating complex nanostructures.
Stimuli-responsive systems are key for controlled release and drug delivery.

Purpose of the Study:

To fabricate multiple-responsive supramolecular vesicles.
To investigate the self-assembly mechanism driven by host-guest complexation and intermolecular forces.
To explore the quintuple-responsive behavior of the fabricated vesicles.

Main Methods:

Complexation of beta-cyclodextrin (β-CD) with a pH/photo dual-responsive amphiphile (HPB).
Self-assembly of inclusion complexes (HPB@β-CD) into vesicles driven by hydrophobic interactions and hydrogen bonds.
Stimulation of vesicle responses using UV/visible light, pH changes, competitive guest molecules, and enzyme addition.

Main Results:

Successfully fabricated supramolecular vesicles with pH and photo-responsiveness.
Demonstrated reversible assembly/disassembly under light irradiation.
Achieved reversible phase transformation between vesicles and microbelts by adjusting pH.
Observed phase transformation to micelles upon addition of competitive guests and α-amylase.
Showcased vesicle destruction with increased β-CD concentration.

Conclusions:

Developed a novel quintuple-responsive supramolecular vesicle system.
The system exhibits complex responsive behaviors to light, pH, competitive guests, enzymes, and host concentration.
Potential applications in controlled release and drug delivery.
Provides a valuable reference for designing multi-responsive systems.