A new series of receptors were designed and synthesized, and their interactions with anions, such as F^-, Cl^-, Br^-, I^-, CH_3COO^-, HSO_4^-, and NO_3^-, in DMSO solvent were investigated using UV-Vis absorption spectroscopy. The results showed that hydrogen-bonding complexes were formed between the receptors and the tested anions, such as CH_3COO^- and F^-. It was also found that the selectivity of the receptors for anions could be efficiently tuned by changing the place of the substituent group at the N-phenyl moiety. The recognition mechanism and binding mode are discussed. These findings were expected to be of significance for designing and developing a novel, highly selective receptor for the acetate anion in a strong polar solvent.
ZHANG, YOU-MING; REN, HAI-XIAN; ZHOU, YAN-QING; LUO, RONG; XU, WEI-XIA; and WEI, TAI-BAO (2007) "Studies on the Anion Recognition Properties of Synthesized Receptors III: A Novel Thiourea-Based Receptor Constructed by Benzo-15-Crown-5 for Sensing Anions in a Strong Polar Solvent," Turkish Journal of Chemistry: Vol. 31: No. 3, Article 9. Available at: https://journals.tubitak.gov.tr/chem/vol31/iss3/9