A study of anion binding behaviour of 1, 3-alternate thiacalix[4]arene-based receptors bearing urea moieties. (26th September 2016)

• Record Type: Journal Article
• Authors: Rahman, Shofiur; Tomiyasu, Hirotsugu; Kawazoe, Hiroto; Zhao, Jiang-Lin; Cong, Hang; Ni, Xin-Long; Zeng, Xi; Elsegood, Mark R. J.; Warwick, Thomas G.; Teat, Simon J.; Redshaw, Carl; Georghiou, Paris E.; Yamato, Takehiko
• Is Part Of: New journal of chemistry. Volume 40:Number 11(2016:Nov.)
• Page Start: 9245
• Page End: 9251
• Publication Date: 2016-09-26
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj00923a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Thiacalix[4]arene receptors with two urea moieties exhibited a high affinity towards all of the selected anions. Abstract : Three novel thiacalix[4]arene receptors4a–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 1 H 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 receptor4c, 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.