Rahman, Shofiur Tomiyasu, Hirotsugu Kawazoe, Hiroto Zhao, Jiang-Lin Cong, Hang Ni, Xin–Long Zeng, Xi Elsegood, Mark Warwick, Thomas G. Teat, Simon J. Redshaw, Carl Georghiou, P.E. Yamato, Takehiko A study of anion binding behaviour of 1,3-alternate thiacalix[4]arene-based receptors bearing urea moieties Three novel thiacalix[4]arene receptors 4a-c each with a 1,3-alternate conformation and possessing two urea moieties linking various phenyl groups substituted with either para electron-donating or -withdrawing groups have been synthesized. The binding properties of these receptors were investigated by means of 1H NMR spectroscopy and UV-vis absorption titration experiments using various anions. The structures and complexation energies were also studied by density functional theory (DFT) methods. The results suggested that receptor 4c, which possesses two p-(trifluoromethyl)phenyl ureido moieties, can complex most efficiently in the urea cavity and exhibits high selectivity towards F- and AcO- ions. untagged;Chemical Sciences not elsewhere classified 2016-12-08
    https://repository.lboro.ac.uk/articles/journal_contribution/A_study_of_anion_binding_behaviour_of_1_3-alternate_thiacalix_4_arene-based_receptors_bearing_urea_moieties/9390038