期刊
POLYMER SYNTHESIS BASED ON TRIPLE-BOND BUILDING BLOCKS
卷 -, 期 -, 页码 1-31出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s41061-017-0161-4
关键词
Polyacetylene; Helix; Helicity induction; Noncovalent chiral interaction; Memory; Chiral amplification; Chiral recognition ability; Chiral stationary phase
资金
- Grants-in-Aid for Scientific Research [16H04154] Funding Source: KAKEN
Construction of predominantly one-handed helical polyacetylenes with a desired helix sense utilizing noncovalent chiral interactions with nonracemic chiral guest compounds based on a supramolecular approach is described. As with the conventional dynamic helical polymers possessing optically active pendant groups covalently bonded to the polymer chains, this noncovalent helicity induction system can show significant chiral amplification phenomena, in which the chiral information of the nonracemic guests can transfer with high cooperativity through noncovalent bonding interactions to induce an almost single-handed helical conformation in the polymer backbone. An intriguing memory effect'' of the induced macromolecular helicity is observed for some polyacetylenes, which means that the helical conformations induced in dynamic helical polyacetylene can be transformed into metastable static ones by tuning their helix-inversion barriers. Potential applications of helical polyacetylenes with controlled helix sense constructed by the noncovalent helicity induction and/or memory effect'' as chiral materials are also described.
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