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Squaramide-substituted calixpyrrole: Synthesis and ion binding studies
- He, Ying-Chun, Ren, Zhen-Xing, Zhao, Xue-Feng, Zhang, Yong-Bin, Wang, Jun-Hong, Chao, Jian-Bin, Wang, Meng-Liang
- Tetrahedron 2019
- anions, binding capacity, chemical reactions, chemical structure, methylene chloride, models, nuclear magnetic resonance spectroscopy, pyrroles, ultraviolet-visible spectroscopy
- Squaramide-substituted calixpyrrole 2 was synthesized and its anion-binding properties were investigated. On the basis of UV spectroscopy, 1H NMR spectroscopic and computational DFT model analyses, compared with the parent calixpyrrole 1, compound 2 shows significantly enhanced binding affinities for anions in CH2Cl2, and it was concluded that this increase in affinity is ascribed to participation of the squaramide unit in anion binding.