A Versatile Strategy for Unimolecular Micelle-Derived
Hollow Polymer Nanoparticles as General Nanoreactors
Posted on 2020-06-12 - 21:03
We
reported the synthesis of a well-defined hollow polymer nanoparticle
derived from star-shaped unimolecular micelles. β-Cyclodextrin
was first applied as an efficient macroinitiator to prepare a star-shaped
PCL via ring-opening polymerization (ROP). Then,
the star-shaped PCL was modified to be a macro-RAFT agent for photoinduced
electron/energy transfer-reversible addition–fragmentation
chain transfer (PET-RAFT) polymerization of S-Cl monomers. The prepared
unimolecular micelles can be photocross-linked under UV irradiation
after a simple nucleophilic substitution reaction, which made −Cl
groups to be −N3 groups. After the selective removal
of the PCL core, hollow polymer nanoparticles were achieved and exhibited
to be a general nanoreactor strategy for the fabrication of nanocrystals
with well-controlled architectures. Compared with unimolecular micelle
templates, the nanocrystals prepared by hollow templates are absolutely
pure as no polymer chains are embedded in the inorganic nanocrystals.
In addition, by changing the concentration of the precursor, the structure
of the nanocrystal can be changed from a normal spherical structure
to a hollow structure.
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Yan, Kailong; Kong, Huimin; Cui, Zhe; Fu, Peng; Liu, Minying; Qiao, Xiaoguang; et al. (2020). A Versatile Strategy for Unimolecular Micelle-Derived
Hollow Polymer Nanoparticles as General Nanoreactors. ACS Publications. Collection. https://doi.org/10.1021/acs.langmuir.0c00673