Design, synthesis and ¹H NMR study of C3v-symmetric anion receptors with urethane-NH as recognition group.

C3v-Symmetric anion receptors 3 and 4 with urethane groups were synthesized by using trindane triol as tripodal molecular framework. In (1)H 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. Copyright © 2015. Published by Elsevier B.V.

Citation

Jin-Oh Park, Suban K Sahoo, Heung-Jin Choi. Design, synthesis and ¹H NMR study of C3v-symmetric anion receptors with urethane-NH as recognition group. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 2016 Jan 15;153:199-205

PMID: 26312736

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