Browsing by Author "Erk, Çakıl"
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The association constant of macrocyclic ether-cation interactions in 1,4-dioxane/water mixtures. III - Effect of temperature on the binding
Erk, Çakıl; Çakır, Ümit; Çiçek, Baki (Wiley-V C H Verlag Gmbh, 1999)The association constant, K-a, of Na+ with [12] crown-4, [15]crown-5 and [18]crown-6 crown ethers were determined in a binary mixture, 1,4-dioxane/water (50/50) using a Na+ ion selective electrode at different temperatures. ... -
The determination of crown-cation complexation behavior in dioxane/water mixtures by conductometric studies
Çiçek, Baki; Çakir, Ümit; Erk, Çakıl (John Wiley & Sons LTD, 1998)Using conductance measurements, an attempt has been made to gain detailed information about the specific molecular interactions of crown compounds with metal ions in a 1,4-dioxane/water binary system. Analyses of the ... -
Estimation of association constants of macrocyclic ethers by potentiometry. Part V. Na+ binding in dioxane/water (80/20)
Çakır, Ümit; Uğraş, Halil İbrahim; Erk, Çakıl (Taylor & Francis Ltd, 2004)The various association constants, beta(nm) and K-nm, of NaCl and NaClO4 with [12]crown-4, [15]crown-5, [18]crown-6, benzo[15]crown-5, benzo[12]crown-4, dibenzo[18]crown-6 and dinaphtho[18]crown-6 have been estimated in a ... -
Estimation of Li+, K+ and Ca2+ complexation with [12]crown-4, [15] crown-5 and [18]crown-6 using a Na+ISE in dioxane-water, part IV - Cation equilibrium constants of macrocyclic ethers with ion selective electrodes
Erk, Çakıl; Çakır, Ümit; Çiçek, Baki (Springer-Verlag Wien, 1999)The (1:1) Na+ equilibrium constants, K-e1, of macrocyclic ethers of [12]crown-4, [12]crown-5 and [18]crown-6 were determined with a Na+ ISE in the presence of a second cation e.g. Li+, K+ and Ca2+ in dioxane/water (50/50). ... -
Experimental, theoretical and biological activity study on the acyl-substituted benzo-18-crown-6, dibenzo-18-crown-6 and dibenzo-24-crown-8
Uğraş, Halil İbrahim; Çakır, Ümit; Azizoğlu, Akın; Kılıç, Turgut; Erk, Çakıl (Springer, 2006)Hexadecanoyl, dihexadecanoyl, dioctadecaneoyl, di-10-undecenoyl, and dicis-9-octadecenoyl derivatives of benzo[18]crown-6, dibenzo[18]crown-6 and dibenzo[24]-8 were synthesized by the condensation of carboxylic acids ... -
The synthesis of novel crown ethers, part VII [1]. Coumarin derivatives of benzocrowns and cation binding from fluorescence spectra
Erk, Çakıl; Bulut, Mustafa; Göçen, Ayten (Springer, 2000)4-[3-(1-benzopyran-2-one)] derivatives of benzo[12]crown-4, benzo[15]crown-5 and benzo-[18]crown-6 were synthesized from 4-[3-(1-benzopyran-2-one)]-1,2-dihydroxy-benzene reacting with bis-ethyleneglycol dihalides or ... -
The synthesis of novel macrocycles, Part V. The coumarin crown ethers and cation binding with fluorescence spectra
Erk, Çakıl; Göçmen, Ayten; Bulut, Mustafa (Gordon Breach Scı Publ Ltd, 1999)The 4-H, 4-methyl and g-phenyl derivatives of benzo-alpha-pyrone of 12-crown-4 and 15-crown-5 were synthesised starting from 4-substituted-6,7-dihydroxy- and 7,8-dihydroxybenzo-alpha-pyrones which reacted with dichloropolyethylene ...
