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    Synthesis and characterization of a novel iminooxime Schiff base ligand and its complexation with copper(II), nickel(II), zinc(II), cadmium(II), and cobalt(II)
    (SLOVENSKO KEMIJSKO DRUSTVO, 2008) Demir, Ibrahim; Bayrakci, Mevluet; Mutlu, Kuersat; Pekacar, A. Ihsan
    In this study, a novel iminooxime ligand having dimetoxide groups as well as its complexes with copper(II), nickel(II), zinc(II), cadmium(II), and cobalt(II) were synthesized. We have used 3,4-dimetoxyacetophenone as starting material, and synthesized isonitroso-3,4-dimetoxyacetophenone by reaction of 3,4-dimetoxyacetophenone with n-butyl nitrite in presence of sodium ethoxide. 3-hydroxyphenylimino-isonitroso-3,4-dimetoxyacetophenone(3) was obtained from reaction of such nitroso compound with 3-aminophenol and its complexes were prepared by treatment of iminooxime with metal salts as Cu(II), Ni(II), Zn(II), Cd(II), and Co(II) in methanol, respectively. All of the structures were characterized by using spectroscopic techniques.
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    Synthesis of di-substituted calix[4]arene-based receptors for extraction of chromate and arsenate anions
    (PERGAMON-ELSEVIER SCIENCE LTD, 2009) Bayrakci, Mevluet; Ertul, Seref; Yilmaz, Mustafa
    The article describes the synthesis of a family of novel calix[4]arene ionophores, 25,27-bis-(2-aminomethylpyridine-propoxy)-26,28-dihydroxycalix[4]arene (5a), 25,27-bis-(3-aminomethylpyridine-propoxy)-26,28-dihydroxycalix[4]arene (5b) and two chromogenic calix[4]arenes, 5,17-dinitro-25,27-bis-(2-aminomethylpyridine-propoxy)-26,28-dihydroxycalix[4]arene (5c), 5,17-dinitro-25,27-bis-(3-aminomethylpyridine-propoxy)-26,28-dihydroxycalix[4]arene (5d) bearing pyridinium units. In the synthesis, the upper and lower rims of p-tert-butylcalix[4]arene were modified in order to acquire binding sites for the recognition of arsenate and dichromate anions. It has been observed that protonated alkylammonium forms of the ionophores showed high affinity toward dichromate and arsenate anions. (C) 2009 Elsevier Ltd. All rights reserved.