期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 26, 页码 10286-10291出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202002734
关键词
allenes; cyclo-copolymerization; helical polymers; isocyanide; pi-stacked polymers
资金
- JSPS [JP19K05582]
- Iketani Science and Technology Foundation
- Ogasawara Foundation for the Promotion of Science Engineering
pi-Stacked polymers, which consist of layered pi-electron systems in a polymer, can be expected to be used in molecular electronic devices. However, the construction of a stable pi-stacked structure in a polymer is considerably challenging because it requires sophisticated designs and precise synthetic methods. Herein, we present a novel pi-stacked architecture based on poly(quinolylene-2,3-methylene) bearing alanine derivatives as the side chain, obtained through the living cyclo-copolymerization of an o-allenylaryl isocyanide. In the resulting polymer, the neighboring quinoline rings of the main chain form a layered structure with pi-pi interactions, which is stabilized by intramolecular hydrogen bonds. The vicinal quinoline units form two independent helices and the whole molecule is a twisted-tape structure. This structure is established on the basis of UV/CD spectra, theoretical calculations, and atomic-force microscopy.
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