期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 1, 页码 226-230出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201811561
关键词
foldamers; halogen bonding; helical structures; hydrogen bonding; self-assembly
资金
- National Natural Science Foundation of China [21772026, 21432004]
Halogen bonding has been used to glue together hydrogen-bonded short arylamide foldamers to achieve new supramolecular double and quadruple helices in the solid state. Three compounds, which bear a pyridine at one end and either a CF2I or fluorinated iodobenzene group at the other end, engage in head-to-tail N center dot center dot center dot I halogen bonds to form one-component supramolecular P and M helices, which stack to afford supramolecular double-stranded helices. One of the double helices can dimerize to form a G-quadruplex-like supramolecular quadruple helix. Another symmetric compound, which bears a pyridine at each end, binds to ICF2CF2I through N center dot center dot center dot I halogen bonds to form two-component supramolecular P and M helices, with one turn consisting of four (2+2) molecules. Half of the pyridine-bearing molecules in two P helices and two M helices stack alternatingly to form another supramolecular quadruple helix. Another half of the pyridine-bearing molecules in such quadruple helices stack alternatingly with counterparts from neighboring quadruple helices, leading to unique quadruple helical arrays in two-dimensional space.
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