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Exploiting cooperative binding of ion-pair to boost anion recognition in water/acetonitrile mixtures
被引:3
作者:
Zalubiniak, Dominika
[1
]
Kos, Joanna
[1
]
Piatek, Piotr
[1
]
机构:
[1] Univ Warsaw, Dept Chem, Pasteura 1, PL-02093 Warsaw, Poland
来源:
关键词:
Supramolecular chemistry;
Salt receptor;
Recognition in water;
Binding cooperation;
RECEPTOR CHEMISTRY HIGHLIGHTS;
HETERODITOPIC SALT RECEPTOR;
SELECTIVITY;
ROTAXANE;
CATIONS;
HALIDE;
WATER;
D O I:
10.1016/j.tet.2017.10.077
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
An L-arginine based compound was designed and prepared as a heteroditopic ion-pair receptor. The cation binding is provided by a sodium selective N-acyl-aza-18-crown-6 subunit whereas for anion complexation, urea and guanidinium groups were introduced. As shown by H-1 NMR titrations this receptor is capable of binding sodium halide ion-pairs in solutions containing up to 20% of water. The halide binding is stronger in the presence of co-coordinated sodium cation than in the presence of non coordinated TBA cation. (C) 2017 Elsevier Ltd. All rights reserved.
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页码:7190 / 7194
页数:5
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