Memon, S.Yılmaz, M.2020-03-262020-03-262001Memon, S., Yılmaz, M., (2001). A Complimentary Study of Calixarene Based Bifunctional Receptors for Alkali or Transition Metal Cations and Cr2o72- Anions. Journal of Molecular Structure, 595, 101-109. DOI: 10.1016/S0022-2860(01)00509-90022-28601872-8014https://dx.doi.org/10.1016/S0022-2860(01)00509-9https://hdl.handle.net/20.500.12395/17492The article describes the syntheses and extraction properties of two new calixarene based receptors (3 and 4); the receptor 3 was synthesized from 25,27-diacetonyloxy-26,28-dihydroxy-5,11,17,23-tetra-tert-butylcalix [4] arene 2 by treatment with tetraethylene glycol ditosylate and then the compound 3 was converted to its Schiff base derivative 4 by refluxing 3 with 1,8-diamino-3,6-dioxaoctane. In the synthesis, the lower rim of p-tert-butylcalix[4]arene has been modified in order to acquire soft and hard binding sites for the recognition of metal cations and Cr2O7-2 selected alkali, transition metal cations and Cr2O7-2 anions are reported. It has been observed that receptor 4 is a better extractant 7 for all metal cations, but not selective as compared to the receptor 3. The protonated alkylinium form of 4 is an effective anions from an aqueous into a dichloromethane layer.en10.1016/S0022-2860(01)00509-9info:eu-repo/semantics/closedAccessCalixareneSchiff BaseCrown EtherArticle595101109Q2WOS:000171376400013Q3