title: Calix[4]arenes containing thiourea and amide moieties: neutral receptors towards alpha,omega-dicarboxylate anions.
abstract: Two-armed neutral anion receptors (4,5), were prepared and examined for their anion-binding ability using UV-vis, fluorescence and 1H NMR spectra in DMSO. The results of non-linear curve fitting indicate that 4 or 5 form 1 : 1 stoichiometric complexes with dicarboxylate anions by multiple hydrogen bonding interactions and the sensitivity for recognition of dicarboxylate depends on the chain length of these dicarboxylate anions. Receptors 4 and 5 have no binding ability with acetate, dihydrogen phosphate and the halogen (Cl-, Br-, I-) anions. This demonstrates that receptors 4 or 5 could be used as chemical sensors for some special dicarboxylate anions.
authors.affiliation: Department of Chemistry, Wuhan University, Wuhan, Hubei 430072, PR China.
authors.forename: Shun-Ying
authors.initials: SY
authors.lastname: Liu
authors.forename: Yong-Bing
authors.initials: YB
authors.lastname: He
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Wu
authors.forename: Lan-Hua
authors.initials: LH
authors.lastname: Wei
authors.forename: Hai-Juan
authors.initials: HJ
authors.lastname: Qin
authors.forename: Ling-Zhi
authors.initials: LZ
authors.lastname: Meng
authors.forename: Ling
authors.initials: L
authors.lastname: Hu
mesh_terms: D000577:Amides / Q000737:chemistry* / Q000378:metabolism; D000838:Anions / Q000737:chemistry / Q000378:metabolism; D047250:Calixarenes; D002264:Carboxylic Acids / Q000737:chemistry* / Q000378:metabolism; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry* / Q000378:metabolism; D013890:Thiourea / Q000737:chemistry* / Q000378:metabolism
chemical_list: D000577:Amides; D000838:Anions; D002264:Carboxylic Acids; D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D013890:Thiourea