期刊
TETRAHEDRON
卷 65, 期 7, 页码 1488-1494出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.11.081
关键词
Crown ether; Paraquat; Host-guest system; Cryptand; Rotaxane
资金
- National Natural Science Foundation of China [20604020, 20774086]
A novel bis(m-phenylene)-26-crown-8-based cryptand has been synthesized. It has been used to prepare two 1:1 complexes with two paraquat derivatives with high association constants (6.5x10(5) and 4.0x10(5) M-1) in acetone. in the solid state the cryptand forms a 2:1 threaded structure with paraquat and an interesting supramolecular poly[2]pseudorotaxane threaded structure with a dihydroxyethyl-substituted paraquat derivative, respectively. It has been further used to prepare cryptand/paraquat derivative [2]rotaxanes efficiently by the immediate solvent evaporation method using easily available 3,5-dimethylphenyl groups as the stoppers. (C) 2008 Elsevier Ltd. All rights reserved.
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