Synthesis of calix[4]arene-based polycarboxylate ligands and their chemical immobilization onto controlled-pore glass |
| |
Authors: | Sebastian Haupt Marcel Handke Robert Kuhnert Maria Poetsch Berthold Kersting |
| |
Institution: | 1. Institut für Anorganische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany;2. Abteilung Reaktiver Transport, Institut für Ressourcenökologie, Helmholtz Zentrum Dresden-Rossendorf e.V. (HZDR), Forschungsstelle Leipzig, Permoserstraße 15, 04318 Leipzig, Germany |
| |
Abstract: | Three new calix4]arene-based carboxylate ligands with an appended allyl function have been synthesized, chemically immobilized onto a controlled-pore glass (CPG), and the extracting ability of selected materials towards Sr2+ in solid-liquid extraction was examined. The calixarenes were characterized by elemental analysis, mass spectrometry, IR and NMR spectroscopy, and where appropriate by X-ray crystallography. Four functionalized CPGs were prepared by radical thiol addition of the corresponding 5-allylcalix4]arenes to γ-mercaptopropyl-modified CPG. Analysis by 13C and 29Si cross polarization/magic angle spinning (CP/MAS) NMR spectroscopy clearly showed the covalent fixation of the calix4]arenes to CPG. The calix4]arene phases were found to be stable up to 200 °C by simultaneous thermal analysis (STA). The extraction performance of the modified CPGs towards Sr2+ were found to be superior over the unmodified CPGs as demonstrated by radiotracing using the short-lived radio nuclide 85Sr. |
| |
Keywords: | Calix[4]arene Controlled-pore glass CP/MAS NMR Solid&ndash liquid extraction Strontium |
本文献已被 ScienceDirect 等数据库收录! |
|