A New Dynamic Covalent Bond of SeN: Towards Controlled Self-Assembly and Disassembly

被引：51
|
作者：
Yi, Yu [1 ]
Xu, Huaping [1 ]
Wang, Lu [1 ]
Cao, Wei [1 ]
Zhang, Xi [1 ]
机构：
[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China
来源：
CHEMISTRY-A EUROPEAN JOURNAL | 2013年 / 19卷 / 29期
基金：
中国国家自然科学基金;
关键词：
block copolymer; covalent bond; NMR spectroscopy; self-assembly; selenium; POLYMERS; CHEMISTRY;
D O I：
10.1002/chem.201301446
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new kind of SeN dynamic covalent bond has been found that can form between the Se atom of a phenylselenyl halogen species and the N atom of a pyridine derivative, such as polystyrene-b-poly(4-vinylpyridine). This SeN dynamic covalent bond can be reversibly and rapidly formed or cleaved under acidic or basic conditions, respectively. Furthermore, the bond can be dynamically cleaved by heating or treatment with stronger electron-donating pyridine derivatives. The multiple responses of SeN bond to external stimuli has enriched the existing family of dynamic covalent bonds. It can be used for controlled and reversible self-assembly and disassembly, which may find potential applications in a number of areas, including self-healing materials and responsive assemblies.
引用
收藏
页码：9506 / 9510
页数：5
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