Sayın, SerkanYılmaz, Mustafa2021-11-302021-11-302011-05-20Sayin, S. vd. (2011). "Syntheses of two diamine substituted 1,3-distal calix[4]arene-based magnetite nanoparticles for extraction of dichromate, arsenate and uranyl ions". Tetrahedron, 67(20), 3743-3753.0040-4020https://doi.org/10.1016/j.tet.2011.03.012https://www.sciencedirect.com/science/article/pii/S0040402011003371http://hdl.handle.net/11452/22868The synthesis of two new calixarene derivatives 4 and 5, functionalized at the lower rim with 4-amino-1-benzylpiperidine to give diamide and diamine derivatives of p-tert-butylcalix[4]arene, is described. They were obtained by the reaction of both the diester derivative of p-tert-butylcalix[4]arene (2) and the dialkyl bromide derivative of p-tert-butylcalix[4]arene (3) with 4-amino-1-benzylpiperidine. The (1)H NMR spectra of calixarene derivatives show that 4 and 5 exist in the cone conformation. Moreover, these diamide and diamine derivatives of p-tert-butylcalix[4]arene (4 and 5) have been immobilized onto 13-(2,3-epoxypropoxy)-Propyl]-trimethoxysilane-modified Fe(3)O(4) magnetite nanoparticles to obtain calixarene-based magnetic nanoparticles M-DADBP-Calix (6) and M-DABP-Calix (7). The calix[4]arene immobilized materials were characterized by a combination of Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM) and Thermogravimetric Analyses (TGA) and elemental analysis. Additionally, the studies regarding the removal of As(V)/Cr(VI) ions as well as U(VI) ion from aqueous solutions were also carried out by using these compounds in liquid liquid/solid liquid extraction experiments. (C) 2011 Elsevier Ltd. All rights reserved.eninfo:eu-repo/semantics/closedAccessChemistryCalix[4]areneMagnetite nanoparticlesExtractionArsenate/dichromateUranylSpectrophotometric determinationBiomedical applicationsSelective extractionChromium(vi)ComplexationAdsorptionChemistryAnionsConformationCalixarenesArticle0002908896000192-s2.0-79955521289374337536720Chemistry, organicCalix(4)Arene; Aromatic Hydrocarbons; Picrates1,3 distal calix[4]arene3 (2,3epoxypropoxy) propyl] trimethoxysilane4 amino 1 benzylpiperidineArsenic acidBlack iron oxide magnetiteBromine derivativeChemical compoundDiamideDiamidine derivativeDiamineDichromic acidMagnetiteNanoparticlePara tert butylcalix[4]areneUnclassified drugUranyl derivativeArticleChemical structureElemental analysisInfrared spectroscopyPriority journalSynthesisThermogravimetryTransmission electron microscopy