Browsing by Author "Demirel, N"
Now showing items 1-13 of 13
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All-solid-state PVC membrane Ag+-selective electrodes based on diaza-18-crown-6 compounds
Isildak, I; Yolcu, M; Isildak, O; Demirel, N; Topal, G; Hosgoren, H (Springer Wien, 2004)Two diaza-crown ether compounds were synthesized and evaluated as Ag+-selective carriers in polyvinylchloride (PVC) membrane electrodes of solid-state type. The all-solid-state PVC membrane electrode based on N,N-Dibenzy ... -
Chiral separation of amino acids by chiral octamide derivatives of calixarenes derived from resorcinol by impregnation on a polymeric support
Seyhan, S; Özbayrak, Ö; Demirel, N; Merdivan, M; Pirinccioglu, N (Pergamon-Elsevier Science Ltd, 2005)Chiral amide derivatives of octaester calixresorcarene were synthesized and employed as chiral stationary phases for chiral discrimination of amino acid derivatives. Enantiomers of phenylglycine and tryptophan were easily ... -
Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(-)-1-phenyl-ethyl ammonium percholorate
Özbey, S; Kaynak, FB; Togrul, M; Demirel, N; Hosgören, H (R Oldenbourg Verlag, 2003)A new type of inclusion complex, S(-)-1 phenyl ethyl ammonium percholorate complex of R-(-)-2-ethyl-N-benzyl-4,7,10,13-tetraoxa-1-azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray ... -
The effect of benzo substitution on complexation of diaza 18-crown-6 ethers derivatives with NaClO4
Köylü, MZ; Demirel, N; Polat, FD; Yilmaz, A; Hosgören, H; Balci, M (Springer, 2005)The complexation of the crown ethers with Na+ ion was studied. H-1-NMR chemical shifts are discussed in terms of structural modi. cation as well as also binding studies with UV-vis spectra were included. -
Enantioselective transport of amino acids as their potassium and sodium salts by optically active diaza-18-crown-6 ethers having arene sidearms
Demirel, N; Bulut, Y; Hosgören, H (Pergamon-Elsevier Science Ltd, 2004)The enantioselective transport of amino acids as their sodium and potassium salts has been investigated by optically active diaza crown ethers. The reversed enantioselectivity of chiral crown ether 1 was observed. (C) 2004 ... -
Serum zinc and copper levels in southeastern Turkish children with giardiasis or amebiasis
Karakas, Z; Demirel, N; Tarakcioglu, M; Mete, N (Humana Press Inc, 2001)Alterations of serum zinc (Zn) and copper (Cu) concentrations are commonly found in patients suffering from gastrointestinal infections and with hepatic, renal, cardiovascular, and malignant diseases. In this study, the ... -
Synthesis of chiral crown ethers and complexation with chiral protonated amine compounds
Togrul, M; Demirel, N; Kaynak, FB; Özbey, S; Hosgören, H (Springer, 2004)The X-ray crystal structure of IX, perchlorate salt of R-(-)-2-ethyl-N-benzyl-4,7,19,13-tetraoxa-8,9-benzo-1-azacyclopentadec-8-ene has been determined. In the molecule, the protonated nitrogen atom participates in two ... -
Synthesis of chiral diaza 18-crown-6 ethers from chiral amines and molecular recognition of potassium and sodium salts of amino acids
Demirel, N; Bulut, Y (Pergamon-Elsevier Science Ltd, 2003)A practical synthesis of chiral amine precursors 3 and 4 and chiral diaza 18-crown-6 ethers 5. 6 and 7 starting from chiral amines are reported. The molecular recognition of these chiral crown ethers for amino acids potassium ... -
Synthesis of chiral diaza 18-crown-6 ethers from chiral amines and molecular recognition of potassium and sodium salts of amino acids (vol 14, pg 2633, 2003)
Demirel, N; Bulut, Y (Pergamon-Elsevier Science Ltd, 2004)[Abstract Not Available] -
Synthesis of new chiral diaza 18-crown-6 ethers from chiral amines
Demirel, N; Turgut, Y; Hosgören, H (Science Reviews 2000 Ltd, 2003)Practical syntheses of versatile building blocks of crown ethers 1 and 2, chiral amine precursors 3-6 and chiral diaza 18-crown-6 ethers 7-12 are reported starting from chiral amines. -
Synthesis of novel chiral C2-symmetric diaza-18-crown-6 ether derivatives and their enantioselective recognition of amino acid derivatives
Turgut, Y; Demirel, N; Hosgören, H (Springer, 2006)New chiral diaza-18-crown-6 ether derivatives, 5 and 6 were synthesized from (R)-(-)-2-amino-1-butanol. These chiral artificial receptors exhibit pronounced chiral recognition toward the enantiomers of L- and D- amino acid ... -
Synthesis of R-(-)-2-ethyl-N-benzyl (benzo-monoaza-15-crown-5) and the crystal structure of its sodium perchlorate complex
Özbey, S; Kaynak, FB; Togrul, M; Demirel, N; Hosgören, H (Springer, 2003)A new complex of a chiral monoaza-crown ether, [R-(-)-2-ethyl-N-benzyl-4,7,10,13-tetraoxa-8,9-benzo-1-azacyclopentadec-8-ene.NaClO4], has been prepared and studied by x-ray diffraction. The compound crystallizes in space ... -
Thorium(IV) and uranium(VI) sorption studies on octacarboxymethyl-C-methylcalix[4]resorcinarene impregnated on a polymeric support
Demirel, N; Merdivan, M; Pirinccioglu, N; Hamamci, C (Elsevier, 2003)The impregnation of octacarboxymethyl-C-methylcalix[4]resorcinarene into a polymeric matrix, Amberlite XAD-4, is reported and was characterized by infrared spectroscopy. The sorption capacity of the impregnated resin is ...
