Dynamic-Covalent Macromolecular Stars with Boronic Ester Linkages

被引：220

作者：

Bapat, Abhijeet P. ^{[1
]}

Roy, Debashish ^{[1
]}

Ray, Jacob G. ^{[3
]}

Savin, Daniel A. ^{[3
]}

Sumerlin, Brent S. ^{[1
,2
]}

机构：

[1] So Methodist Univ, Dept Chem, 3215 Daniel Ave, Dallas, TX 75275 USA

[2] So Methodist Univ, Ctr Drug Discovery Design & Delivery, Dallas, TX 75275 USA

[3] Univ So Mississippi, Sch Polymers & High Performance Mat, Hattiesburg, MS 39406 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 49期

基金：

美国国家科学基金会;

关键词：

RAFT POLYMERIZATION; MOLECULAR-WEIGHT; POLYMERS; CORE; ACID; COPOLYMERS; CRYSTALLINE; EFFICIENT; STRATEGY;

D O I：

10.1021/ja207005z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：19832 / 19838

页数：7

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