期刊
CHEMICAL SCIENCE
卷 2, 期 5, 页码 922-927出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1sc00034a
关键词
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资金
- EPSRC [EP/E033962/1]
- Johnson Matthey
- Clarendon Fund
- Trinity College
- Diamond Light Source [MT1880]
- Engineering and Physical Sciences Research Council [EP/E033962/1] Funding Source: researchfish
The syntheses and cation recognition studies of two novel heteroditopic [2]catenanes that are capable of reversible rotary motion are described. Prepared by chloride anion templation, both catenanes possess a calixdiquinone unit able to bind Na+, K+, NH4+ and Ba-2(+) cations. Following characterization of the chloride salts of both catenanes by NMR, mass spectrometry and crystal structure determination, hexafluorophosphate salts were investigated for their behaviour upon addition of cations. Ba-2(+) complexation caused a partial intra-ring rotation of the two macrocycles in both species, which was reversed upon addition of the sequestering SO42- anion.
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