Journal
MACROMOLECULES
Volume 45, Issue 16, Pages 6457-6463Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma301162s
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Funding
- National Natural Science Foundation of China [20834004, 91027006, 21125417]
- Fundamental Research Funds for the Central Universities [2012QNA3013]
- Program for New Century Excellent Talents in University
- Zhejiang Provincial Natural Science Foundation of China [R4100009]
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A novel supramolecular amphiphilic polymer constructed by crown ether-based molecular recognition has been fabricated and demonstrated to self-assemble into core-shell supramolecular micelles in water. The reversible transition between assembled and disassembled structures can be achieved by changing the pH. This transition was used to realize the controlled release of small molecules. The supramolecular micelle was characterized by various techniques including conductivity, transmission electron microscopy (TEM), dynamic laser light scattering (DLS), and fluorescence titration. TEM images showed dark gray spherical aggregates, and the mean size of the micelles was 50 nm in diameter and of uniformly dispersed size, in good agreement with the DLS results. The release of hydrophobic molecules from the micelles was realized by adding acid (aqueous HCl), weakening the host-guest interactions and leading to disassembly of the supramolecular micelles.
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