Design, synthesis and H-1 NMR study of C-3v-symmetric anion receptors with urethane-NH as recognition group

作者：Park Jin Oh; Sahoo Suban K; Choi Heung Jin^*

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2016, 153: 199-205.

DOI：10.1016/j.saa.2015.08.015

• Tripodal receptors
• C-3v symmetry
• Anion recognition
• Urethane-NH
• H-1 NMR

C-3v-Symmetric anion receptors 3 and 4 with urethane groups were synthesized by using trindane triol as tripodal molecular framework. In H-1 NMR titration study, the receptors showed noticeable downfield shift/disappearance of the urethane-NH peak in presence of H2PO4- and F- due to the host-guest complexation occurred through multiple hydrogen bonding and/or the deprotonation of urethane-NH groups. Other tested anions such as Cl-, Br-, HSO4-, and NO3- showed either no or negligible chemical shift of the urethane groups. The deprotonation event in 4 allowed selective detection of F- by perceptible color change from colorless to yellowish-red with the appearance of a new charge transfer absorption band at 450 nm.

• 出版日期2016-1-15