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Characterization and spectrophotometric studies of new Cu(II), Ni(II), Zn(II) complexes with Schiff base derived from 192-bis-(o-aminophenoxy)ethane and salicylaldehydel
(Maik Nauka/Interperiodica/Springer, 2005) Aydin, H; Ziyadanogullari, B; Temel, H
The thermodynamic parameters of complexes of Cu(II), Ni(II), and Zn(II) cations with 1,2-bis-(o-aminophenoxy)ethane and salicylaldehyde were determined in 60% (v/v) DMF-water, with various ionic strengths (0.07, 0.13, and 0.2 M NaNO3), and at different temperatures (25, 30, 35, and 40 +/- 0.1 degrees C) using a spectrophotometric method. Sodium nitrate solution was used to maintain the ionic strengths. The stability constants show an inverse relationship with ionic strengths. The thermodynamic parameters (60% (v/v) DMF-water) (Delta G degrees, Delta H degrees, Delta S degrees) based on these formation constants were determined. The values of enthalpy change are negative for all systems. The ligand behaves toward the metal ion as a tetradentate ligand. The acid dissociation constant of ligand was investigated in 60% (v/v) DMF-water and calculated at different temperatures.
Chemical etching of Cu-ETP copper
(Elsevier Science Sa, 2005) Çakir, O; Temel, H; Kiyak, M
Chemical etching is the controlled dissolution of workpiece material by contact with strong chemical solution. The process can be applied to any material. Copper is one of the extensively used engineering material in the fabrication of microelectronic components, microengineered structures and precision parts by using chemical etching process. In this study, copper is chemically etched. with two different etchants (ferric chloride and cupric chloride) at 50 degrees C. The effects of selected etchants and machining conditions on the depth of etch and surface roughness were investigated. The experimental study provided that ferric chloride produced the fastest chemical etch rate, but cupric chloride produced the smoothest surface quality. (c) 2005 Elsevier B.V. All rights reserved.
Complexation and mutagenicity potential studies with N,N?-bis(2-hydroxynaphthalin-1-carbaldehydene)-1,2-bis-(P-aminophenoxy)ethane and a novel oxovanadium(IV) complex
(Taylor & Francis Ltd, 2004) Temel, H; Çakir, Ü; Tolan, V; Otludil, B; Ugras, HI
A new oxovanadium(IV) complex of the Schiff base obtained by condensation of 1,2-bis(p-aminophenoxy)ethane with 2-hydroxynaphthalin-1-carbaldehyde was synthesized. The complex was characterized by elemental analysis, magnetic measurements, mass spectral data, UV-visible and IR spectra. Stability constants and thermodynamic values for complexation between Cu(NO3)(2), Zn(NO3)(2) (.) 6H(2)O, Ni(NO3)(2) (.) 6H(2)O and VOSO4 (.) 5H(2)O and the ligand in 80% dioxane/water were determined by conductance measurements. Ni(II) and Cu(II) complexes of the ligand synthesized by a previously described method were found to be mutagens on strain TA 100 in the presence and absence of S9 mix. These compounds are classified as mutagenic in the Ames test.
Determination of stability constants and thermodynamic parameters of some metal complexes with 2-hydroxynaphthalene-1-carbaldehydene-1-naphthylamine
(Maik Nauka/Interperiodica/Springer, 2005) Ziyadanogullari, B; Aydin, F; Sahin, E; Aydin, I; Temel, H
The thermodynamic parameters of complexes of Cu(II), Ni(II), and Zn(II) cations with hydroxynaphthalene-1-carbaldehydene-1-naphthylamine were determined in 60% (v/v) DMF-water, at various ionic strengths (0.07, 0.13, 0.2 M NaNO3), and at different temperatures (25, 30, 35, 40 +/- 0.1 degrees C) using a spectrophotometric method. A sodium nitrate solution was used to maintain the ionic strengths. The stability constants show an inverse relationship with the ionic strengths. The thermodynamic parameters (60% (v/v) DMF-water (Delta G(0), Delta H-0, Delta S-0)) based on these formation constants were determined. The acid dissociation constant of the ligand was investigated in 60% (v/v) DMF-water and was also calculated at different temperatures.
Electrical and optical properties of inorganic complexes C36H76N2O9ClNa and C14H12N2O4TeBr2
(Editions Scientifiques Medicales Elsevier, 2001) Aydogdu, Y; Yakuphanoglu, F; Aydogdu, A; Temel, H; Sekerci, M; Hosgoren, H
The electrical properties of some inorganic samples were studied as functions of temperature and the results were analyzed. These samples activation energies were calculated from the electrical conductivity measurements. Also, a detailed study of optical absorption is presented. The optical absorption spectra are measured in the UV+invisible wavelength range 200-1100 nm. The absorption coefficient and value optical energy gaps were determined from the absorption spectra. The complex C36H76N2O9ClNa is characterized by direct optical absorption with an optical edge at 4.49 eV. However, the complex C14H12N2O4TeBr2 is characterized by indirect optical absorption with an optical edge at 1.45 eV, and a nearby direct one at hv = 1.80 eV. (C) 2001 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
New copper(II), manganese(III), nickel(II) and zinc(II) complexes with a chiral quadridentate Schiff base
(Springer, 2002) Temel, H; Hosgören, H
A chiral Schiff base ligand (H2L) was obtained by condensing 2-hydroxynaphthalene-1-carbaldehyde with substituted (1R,2R)-(-)-diaminocyclohexane. Chiral Schiff base complexes [CuL], [NiL], [ZnL] and [MnLOH] have been synthesized and characterized by elemental analyses, Lambda(M), i.r., u.v.-vis. and H-1-n.m.r. and magnetic measurements.
Novel complexes of manganese(III), cobalt(II), copper(II), and zinc(II) with Schiff base derived from 1,2-bis(p-aminophenoxy)ethane and salicylaldehyde
(Marcel Dekker Inc, 2001) Temel, H; Sekerci, M
Several new complexes of the Schiff base obtained by the condensation of 1,2-bis(p-aminophenoxy)ethane with salicylaldehyde were synthesized. The complexes have been characterized by elemental analyses, magnetic measurements, H-1 NMR, UV-VIS and IR spectra. The ligand is coordinated to the central metal as a tetradentade ONNO ligand. The four bonding sites are the azomethine nitrogen and the o-OH groups.
Preparation of new o-carboxyanilinotellurium(IV) bromides and their dyeing properties
(Marcel Dekker Inc, 2001) Topal, G; Temel, H; Yavuz, Ö; Coskun, M; Sekerci, M
This study represents a new synthesis of two organotellurium compounds and their dyeing properties. The structure of these tellurium derivatives are proposed based on elemental analyses, IR, UV-Vis, H-1 and C-13 NMR spectra and thermogravimetric analyses (TGA).
Spectral and antifungal studies of transition metal complexes of N,N?-ethylenebis(salicylideneimine)
(Maik Nauka/Interperiodica/Springer, 2004) Temel, H; Taskin, T; Sekerci, M
Mixed ligand Schiff base complexes of Ti(IV), Co(11), Ni(II) and Cu(II) derived from salicylaldehyde and 1,2-diaminoethane have been synthesized and their spectral studies carried out. The complexes have been characterized by elemental analysis, molar conductivities, magnetic measurements, H-1 NMR, UV, visible and IR-spectra. The antifungal effects of the mixed ligand Schiff base complexes of Ni(II), Cu(II) and Ti(IV) on Fusarium oxysporum ssp. melonis and Alternaria sp. were investigated. Antifungal effects on pathogen fungi have been observed with each complex in the study. The complexes inhibited fungi growth at a 66.7 mug/ml concentration of Ni(II) complex, and at a 133.3 mum/ml concentration of Cu(II) and Ti(IV) complexes.
Spectroscopic and conductance studies of new transition metal complexes with a Schiff base derived from 4-methoxybenzaldehyde and 1,2-bis(p-aminophenoxy)ethane
(Taylor & Francis Inc, 2003) Çakir, Ü; Temel, H; Ilhan, S; Ugras, HI
Four new metal complexes of Cu(II), Ni(II), Zn(II) and Co(III) with Schiff base derived from 4-methoxybenzaldehyde and 1,2-bis(p-aminophenoxy)ethane have been prepared and characterized by magnetic susceptibility, conductance measurements, elemental analyses, UV-Vis, H-1 NMR and IR spectra studies. The magnetic and spectroscopic data indicate an octahedral geometry for the six-coordinate complexes. The ligand was used for complexation studies. Stability constants were measured by means of a conductometric method. Furthermore, the stability constants for complexation between ZnCl2, Cu(NO3)(2) and AgNO3 salts and ligand (L) in 80% dioxane-water and pure methanol were determined from conductance measurements. In 80% dioxane-water, the stability constants (log Ke) increase inversely with the crystal radii in the order Ag(I) < Zn(II) < Cu(II).
Synthesis and characterization of a new bidentate Schiff base and its transition metal complexes
(Taylor & Francis Inc, 2002) Temel, H; Ilhan, S; Sekerci, M
The new bidentate Schiff base ligand L was synthesized by treating cinnamaldehyde with 1,2-bis(p-aminophenoxy)ethane. The complexes of Cu(II), Ni(II), Zn(II) and Mn(II) with the Schiff base have been characterized by magnetic susceptibility, conductance measurements, elemental analyses, IR, UV-Vis, H-1 and C-13 NMR studies. The analytical, conductance, spectral and magnetic data support the mononuclear formulations of these complexes with M:L = 1:2. In addition there are two hydroxo ligands present.
Synthesis and characterization of a novel oxovanadium(IV) complex and conductometric studies with N,N?-bis(salicylidene)-1,2-bis-(p-aminophenoxy)ethane
(Marcel Dekker Inc, 2004) Temel, H; Akir, U; Ugras, HI
A new oxovanadium complex of the Schiff base obtained by the condensation of 1,2-bis(p-aminophenoxy)ethane with salicylaldehyde was synthesized. The complex has been characterized by elemental analyses, magnetic measurements, UV-VIS and IR spectra. Stability constants and thermodynamic values for complexation between Cu(NO3)(2), Zn(NO3)(2).6H(2)O, and VOSO4.5H(2)O salts and the ligand synthesized by the method described in the literature in 80% dioxane-water and pure methanol were determined by conductance measurements. The stability constants (log K-c) in 80% dioxane/water decrease in the order Cu(II) > (Zn(II). However, just the opposite behavior has been obtained for these metal complexes with the ligand in methanol (Zn(II) > (Cu(II)). The magnitudes of these ion association constants are related to the nature of solvation of the cation and of the complexed cation. The mobility of the complexes is also dependent, in part, upon solvation effects. Since the mobility of the VO(IV)L complex has been found to be higher than that of VO(IV) ion, assuming that the complex-solvent interaction in the VO(IV)-L systems is comparatively weak. A major consequence of the complexation is the increase in the molar conductivity of the complex and a corresponding large decrease in kappa values. For this reason, it was not obtained any stability constant values for VO(IV)-L systems in two type of solvents.
Synthesis and characterization of Na+ and Ba2+ complexes with some lipophilic diaza-18-crown-6 derivatives
(Springer, 1998) Temel, H; Hosgören, H; Çakir, Ü; Boybay, M
The solid and stable Na+ and Ba2+ complexes of 7,16-Dibenzyl-4,7,10,13-tetraoxa-7, 16-diazacyclooctadecane; 7, 16-Dihexyl-4,7,10,13-tetraoxa-7,16-diazacyclooctadecane; 7,16-Dihep-tyl-4,7,10,13-tetraoxa-7,16-diazacyclootadecane, 7,16-Dioctyl-4,7, 10,13-tetraoxa-7, 16-diazacycloctadecane; 7,16-Dinon yl-4,7,10,13 -tetraoxa-7,16-diazacyclooctadecane; 7,16-Didodecyl-4,7, 10, 13-tetraoxa-7,16-diazacyclooctadecane were prepared. The complexes were investigated using Elemental Analysis, IR, H-1 NMR, C-13 NMR spectroscopy. H-1 and C-13 chemical shifts observed in complexes are discussed in terms of conformational changes on the macrocycles.
Synthesis and characterization of Na+, K+, Ca2+, Ba2+, Sr2+, and Pb2+ complexes with some lipophilic diaza-18-crown-6 derivatives
(Marcel Dekker Inc, 2002) Temel, H; Hosgören, H; Boybay, M
In this study, the complexes of 7,16-Dibenzyl-4,7,10,13-tetraoxa-7,16-diazacyclooctadecane; 7,16-Dihexzyl-4,7,10,13tetraoxa-7,16-diazacyclooctadecane; 7,16-Diheptyl-4,7,10,13tetraoxa-7,16-diazacyclooctadecane; 7,16-Dioctyl-4,7,10,13tetraoxa-7,16-diazacyclooctadecane; 7,16-Dinonyl-4,7,10,13tetraoxa-7,16-diazacyclooctadecane; 7,16-Didodecyl 4,7,10, 13-tetraoxa-7,16-diazacyclooctadecane with Na+, K+, Ca2+, Ba2+, Sr2+ and Pb2+ were prepared by using perchlorates salts. Their complexes were produced by adding the solution of metal salts in ethyl alcohol to the solution of ligand in ethyl alcohol. The complexes obtained were filtered and washed with ethyl alcohol and recrystallizied in ethyl alcohol and dried in vacuum. Their complexes were investigated by using Elemental Analysis, and infrared (IR). Observed H-1 NMR,C-13 NMR, and C-13 chemical shifts are discussed in terms of conformational changes of the macrocycle.
Synthesis and characterization of Zn(II), Cu(II) and Ni(II) complexes with bidentate Schiff base ligands
(Interperiodica, 2001) Temel, H; Çakir, Ü; Ugras, HI
The nickel(II), copper(II), and zinc(II) complexes with Schiff bases derived from 1-naphthylarnine and 2-hydroxy naphthaline-1-carbaldehyde (HL) or 1,4-diaminobutane and 4-methoxy benzaldehyde (L') have been prepared. The complexes have been characterized by elemental analysis, magnetic measurements, conductance measurements, H-1 NMR, UV, visible and IR-spectra. Analytical data and conductance spectral and magnetic studies provide evidence of the existence of mononuclear compounds corresponding to a stoichiometry of the M-II : L (1 : 2) type, Furthermore, the conductometric determination of the complexation constant, Ke, of AgNO3, ZnCl2, and Cu(NO3)(2) in 80% dioxane-water in the presence of HL and L' Schiff bases has been investigated. A small complexation constant value was found for the Cu(NO3)(2) with both HL and L' Schiff base ligands.
Synthesis and complexation of new substituted dibenzodiaza macrocyclic diester compounds
(Taylor & Francis Inc, 2002) Topal, G; Temel, H; Çakir, Ü; Ugras, HI; Karadeniz, F; Hosgören, H
The synthesis of some new precoursers that contain substituted benzo units and their use in the preparation of azama-crocyclic diester compounds are reported. These precoursers and ligands were characterized by Elemental analysis, H-1 and C-13 NMR spectroscopy, and IR spectroscopy. The complexation constants Ke and DeltaGdegrees values for the diesters with several transition metal cations (Ag+, Zn2+ and Cu2+) in a dioxan-water system using a conductometric method at 25degreesC are also reported.
The synthesis and spectral characterization of new Cu(II), Ni(II), Co(III), and Zn(II) complexes with Schiff base
(Taylor & Francis Inc, 2002) Temel, H; Ilhan, S; Sekerci, M; Ziyadanogullari, R
Cu(II), Ni(II), Co(III) and Zn(II) complexes with Schiff base have been prepared. Ligand is derived from condensation of 1,2-bis(p-aminophenoxy)ethane and 2-hydroxynaphthalin-1-carbaldehyde. The complexes have been characterized by elemental analyses, Lambda(M), IR, UV-VIS, H-1 NMR, C-13 NMR and magnetic measurements. The ligand is coordinated to the central metal as a tetradentade ONNO ligand. The four bonding sites are the azomethine nitrogen and aldehydic-OH groups.
Synthesis and spectroscopic studies of new Cu(II), Ni(II), VO(IV) and Zn(II) complexes with N,N?-bis(2-hydroxynaphthalin-1-carbaldehydene)-1,2-bis-(O-aminophenoxy)ethane
(Taylor & Francis Ltd, 2004) Temel, H
A novel tetradentate, N2O2-type Schiff base, synthesized from 1,2-bis-(o-aminophetioxy)ethane and 2-hydroxynaphthalin-1-carbaldehyde, forms stable complexes with transition metal ions such as Cu(II), Ni(II), VO(IV) and Zn(II) in DMF. Microanalytical data, elemental analyses, magnetic measurements, H-1 NMR, UV, visible and IR-spectra as well as conductance measurements were used to confirm the structures.
Synthesis of new lariat cyclicdiamides and their metal complexes
(Kluwer Academic Publ, 1996) Cakir, U; Karakaplan, M; Temel, H; Hosgoren, H; Erk, C
Three new lariat dilactam host molecules were prepared by the reaction of triethyleneglycol dicarboxylic acid dichloride with N, N'-disubstituted-4, 7-dioxa-1, 10-diazadecane precursors. The amide nitrogen pivot of such compounds are substituted with the benzyl, octyl and dodecyl groups. The complexing ability of these dilactams is displayed with a series of metal complexes of Na+, K+, Ca2+, Sr2+, Pb2+ and Ag+ ions. The structures determined are consistent with the data of H-1-NMR, C-13-NMR, IR spectra and elemental analyses.
The synthesis, characterization and conductance studies of new Cu(II), Ni(II) and Zn(II) complexes with the Schiff base derived from 1,2-bis-(o-aminophenoxy)ethane and salicylaldehyde
(Taylor & Francis Ltd, 2003) Temel, H; Çakir, Ü; Ugras, HI; Sekerci, M
Cu(II), Ni(II) and Zn(II) complexes with the Schiff base derived from 1,2-bis-(omicron-aminophenoxy)ethane with salicylaidehyde have been prepared. The complexes have been characterized by elemental analysis, magnetic measurements, H-1 NMR, C NMR, UV, visible and IR spectra as well as conductance measurements. The ligand is coordinated to the central metal as a tetradentate ONNO ligand. The four bonding sites are the central azomethine nitrogen and aldehydic OH groups. The ligand was used for complexation studies. Stability constants were measured by a conductometric method. Furthermore, the stability constants for complexation between ZnCl2 and Cu(NO3)(2) salts and N,N'-bis(salicylidene)-1,2-bis-(omicron-aminophenoxy)-ethane (H2L) in 80% dioxane/water and pure methanol were determined from conductance measurements. The magnitudes of these ion association constants are related to the nature of the solvation of the cation and the complexed cation. The mobilities of the complexes are also dependent, in part, upon solvation effects.

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