title: Complexation of cyclohexanocucurbit[6]uril with cadmium ions: X-ray crystallographic and electrochemical study.
abstract: Complexation of cyclohexanocucurbit[6]uril (Q*[6]), a water-soluble cucurbit[n]uril derivative, with Cd(2+) ions has been studied by means of cyclic voltammetry and differential pulse voltammetry. The electrochemical experimental data prove the formation of a highly stable 1:6 Q*[6]/Cd(2+) complex. We also obtained the single-crystal X-ray structure of a cadmium ion complex with Q*[6], in which each portal of Q*[6] chelates three cadmium ions. The present study suggests the potential utility of Q*[6] as an effective cadmium ion chelator and extractant.
authors.affiliation: Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China.
authors.forename: Xing
authors.initials: X
authors.lastname: Feng
authors.forename: Zhong-Fei
authors.initials: ZF
authors.lastname: Li
authors.forename: Sai-Feng
authors.initials: SF
authors.lastname: Xue
authors.forename: Zhu
authors.initials: Z
authors.lastname: Tao
authors.forename: Qian-Jiang
authors.initials: QJ
authors.lastname: Zhu
authors.forename: Yun-Qian
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Jing-Xin
authors.initials: JX
authors.lastname: Liu
mesh_terms: D001952:Bridged-Ring Compounds / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry* / Q000302:isolation & purification; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D006586:Hexanes / Q000737:chemistry; D007093:Imidazoles / Q000737:chemistry*; D007477:Ions / Q000737:chemistry / Q000302:isolation & purification; D012995:Solubility; D014867:Water / Q000737:chemistry; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils
chemical_list: D001952:Bridged-Ring Compounds; D002104:Cadmium; D056831:Coordination Complexes; D006586:Hexanes; D007093:Imidazoles; D007477:Ions; D014867:Water; C454805:cucurbit(6)uril; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils