3539-06-8Relevant articles and documents
Benzene-based tripodal isothiouronium compounds as sulfate ion receptors
Seong, Hye Ran,Kim, Dae-Sik,Kim, Sung-Gon,Choi, Heung-Jin,Ahn, Kyo Han
, p. 723 - 727 (2007/10/03)
Novel benzene-based tripodal isothiouronium receptors are synthesized for the selective recognition of tetrahedral oxoanions. The binding study by isothermal titration calorimetry indicates that the cationic receptors bind sulfate ions preferably in a tripodal mode, while they show a mixed binding mode toward phosphate ion. The tripodal isothiouronium receptors show large ΔG0 values toward sulfate ions in methanol, which are entropy driven. The results demonstrate that a subtle structural constraint can lead to different binding modes toward structurally similar anions.