High Affinity of Water-Soluble Cryptophanes for Cesium Cations
High Affinity of Water-Soluble Cryptophanes for Cesium Cations
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DOI：
10.1021/jo202259r
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发表时间：
2012-01-20
影响因子：
3.6
通讯作者：
Buffeteau, Thierry
中科院分区：
文献类型：
--
作者：
Brotin, Thierry;Montserret, Roland;Buffeteau, Thierry
Exceptionally high affinity for cesium cations was achieved in aqueous solution using two enantiopure cryptophanes. Complexation of cesium was evidenced by Cs-133 NMR spectroscopy and by electronic circular dichroism (ECD). Binding constants as high as 6 X 10(9) M-1 have been measured by isothermal titration calorimetry (ITC). Very strong complexation of rubidium cations (K similar to 10(6) M-1) has also been measured. Chiral hosts allowed the detection of the two cations at low concentrations (mu M) using ECD.
