title: Structure of a piperidine-modified calix[4]arene derivative and spectral resolution of its interaction with rare earth metals with chemometric methods.
abstract: A piperidine-modified calix[4]arene derivative was synthesized and its structure was confirmed with X-ray diffraction data. UV-visible spectroscopy was used to study its molecular recognition of rare earth ions. The results revealed the calix[4]arene derivative could separate tight metal picrate ion pairs by complexation with the rare earth metal ions in tetrahydrofuran. Resolution of the UV-visible spectra with chemometric methods revealed that the derivative and the rare earth ions Eu(3+), Dy(3+), and Tb(3+) formed ML(2) complexes with stability constants of 10(8.26), 10(8.29), and 10(7.41) respectively.
authors.affiliation: Department of Chemistry, Tongji University, No. 1239 Siping Road, Shanghai 200092, People's Republic of China. wangli@tongji.edu.cn
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Xiaoya
authors.initials: X
authors.lastname: Wang
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Wang
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry; D018360:Crystallography, X-Ray; D005663:Furans / Q000737:chemistry; D008674:Metals, Rare Earth / Q000737:chemistry*; D008958:Models, Molecular; D010636:Phenols / Q000737:chemistry*; D010880:Piperidines / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D056831:Coordination Complexes; D005663:Furans; D008674:Metals, Rare Earth; D010636:Phenols; D010880:Piperidines; C121325:calix(4)arene; D047250:Calixarenes; C018674:tetrahydrofuran; C032727:piperidine