Dynamic-Covalent Macromolecular Stars with Boronic Ester Linkages
Document Type
Article
Publication Date
12-1-2011
Department
Polymers and High Performance Materials
Abstract
Macromolecular stars containing reversible boronic ester linkages were prepared by an arm-first approach by reacting well-defined boronic acid-containing block copolymers with multifunctional 1,2/1,3-diols. Homopolymers of 3-acrylamidophenylboronic acid (APBA) formed macroscopic dynamic-covalent networks when cross-linked with multifunctional diols. On the other hand, adding the diol cross-linkers to block copolymers of poly(N,N-dimethylacrylamide (PDMA))b-poly(APBA) led to nanosized multiarm stars with boronic ester cores and PDMA coronas. The assembly of the stars under a variety of conditions was considered. The dynamic-covalent nature of the boronic ester cross-links allowed the stars to reconfigure their covalent structure in the presence of monofunctional diols that competed for bonding with the boronic acid component. Therefore, the stars could be induced to dissociate via competitive exchange reactions. The star formation-dissociation process was shown to be repeatable over multiple cycles.
Publication Title
Journal of the American Chemical Society
Volume
133
Issue
49
First Page
19832
Last Page
19838
Recommended Citation
Bapat, A. P.,
Roy, D.,
Ray, J. G.,
Savin, D. A.,
Sumerlin, B. S.
(2011). Dynamic-Covalent Macromolecular Stars with Boronic Ester Linkages. Journal of the American Chemical Society, 133(49), 19832-19838.
Available at: https://aquila.usm.edu/fac_pubs/568