Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 19, Issue 29, Pages 9506-9510Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201301446
Keywords
block copolymer; covalent bond; NMR spectroscopy; self-assembly; selenium
Categories
Funding
- National Basic Research Program of China [2013CB834502]
- National Natural Science Foundation of China [21074066]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21121004]
- Tsinghua University Initiative Scientific Research Program
- NSFC-DFG [TRR 61]
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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.
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