A5048967217- Metal complexes synthesis and properties
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Synthesis and biological activity
- Free Radicals and Antioxidants
- Magnetism in coordination complexes
- Inorganic and Organometallic Chemistry
- Synthesis and Characterization of Heterocyclic Compounds
- Thermal and Kinetic Analysis
- Crystallography and molecular interactions
- Conducting polymers and applications
- Electrochemical Analysis and Applications
- Synthesis of Indole Derivatives
- CO2 Reduction Techniques and Catalysts
- Nonlinear Optical Materials Research
- Metal-Organic Frameworks: Synthesis and Applications
- Crystal structures of chemical compounds
- Organometallic Compounds Synthesis and Characterization
- Analytical Methods in Pharmaceuticals
- Chemical Thermodynamics and Molecular Structure
- Vanadium and Halogenation Chemistry
- Advanced Chemical Sensor Technologies
- Carbon dioxide utilization in catalysis
- Synthesis and properties of polymers
- Synthesis and Biological Evaluation
Istanbul University
2013-2024
Istanbul University-Cerrahpaşa
2019-2024
Five novel ONS donor Schiff base ligands were synthesized by the reaction of 2-hydroxybenzophenone (L1), 2-hydroxy-4-methoxybenzophenone (L2), 2-hydroxy-4-octyloxybenzophenone (L3), 2-hydroxy-4-methoxy-4′-methylbenzophenone (L4), and 2-hydroxy-4-allyloxybenzophenone (L5) with thiocarbohydrazide. Neutral solvate dioxomolybdenum(VI) complexes general formula [MoO2L(ROH)], [C1–C5] (L = L1, L2, L3, L4, L5 R CH3, C2H5, or C4H9), prepared from these bases. Characterization all compounds was...
Ayşe Erçağa*, Musa Şahina, Atif Kocab & Esat Bozkurtc a Engineering Faculty, Department of Chemistry , Istanbul University Turkey b Chemical Marmara c Faculty Arts and Sciences, Physics Ondokuz Mayis Samsun
The adsorption of 3,5-dimethyltetrahydro-1,3,5-thiadiazine-2-thione (dazomet) on bentonite and clinoptilolite has been studied at four temperatures (288, 293, 298 303 K) two different solutions (water water-ethyl alcohol mixture, 50% v/v). rates low concentrations dazomet were found to fit the first-order kinetic equation. For each system constant concentration, rate constants increased with increasing temperature in aqueous solution, but these decreased for (v/v) mixture solution. By using...
By using a half-salen ligand (HL) and substituted salicylaldehydes, new unsymmetrical salen-type ligands (H2L1, H2L2, H2L3) their Ni(II), Zn(II) Fe(III) complexes were synthesized. The compounds characterized based on elemental analysis, IR, 1H NMR, X-ray diffraction (for HL), spectroscopy, mass spectrometry, magnetic moment, molar conductance measurements, thermal analysis (TGA). salen ligands, during complexation, are attached to the metal by two imine nitrogen atoms phenolic oxygen in all...
The new complexes, M(CO)5(Schiff base) [M = Cr; 1, Mo; 2, W; 3, Schiff base 4-salicylidenamino-3-hydrazino-5-mercapto-1,2,4-triazole, SAHMT, a; 4-(2-hydroxynaphthylidenamino)-3-hydrazino-5-mercapto-1,2,4-triazole, 2HNAHMT, b; 4-(3-hydroxybenzylidenamino)-3-hydrazino-5-mercapto-1,2,4- triazole, 3HBAHMT, c; 4-(4-hydroxybenzylidenamino)-3-hydrazino-5-mercapto-1,2,4- 4HBAHMT, d; 4-(5-bromosalicylidenamino)-3-hydrazino-5-mercapto-1,2,4-triazole, 5BrSAHMT, e; were synthesized by photochemical...
The new complexes [M(CO)5‐DABRd] [M=Cr; 1, Mo; 2, W; 3], [cis‐Re(CO)4Br‐DABRd] (4), [M(CO)5‐BRd] 5, 6, 7] and [Mo(CO)5‐L] [L=Rd, 8; 2CBRd, 9; 2HNARd, 10; IBRd, 11] have been synthesized by the photochemical reactions of VIB VIIB group metal carbonyls [M(CO)6] [M=Cr, Mo, W] [Re(CO)5Br] with 5‐(4‐dimethylaminobenzylidene)rhodanine (DABRd), 5‐benzylidenerhodanine (BRd), rhodanine (Rd), 5‐(2‐chlorobenzylidene)rhodanine (2CBRd), 5‐(2‐hydroxynaphtylidene)rhodanine (2HNARd),...
The stability constants of the 1:1 binary complexes Ni(II) and Co(II) with 3-amino-1,2,4-triazole (AT), leucine (Leu) glutamic acid (Glu), 1:1:1 ternary complex them protonation ligands were determined potentiometrically at a constant ionic strength I = 0.10 mol L-1 (NaClO4) in aqueous solutions 15.0 25.0 ?C. thermodynamic parameters ?Gf0, ?Hf0 ?Sf0 are reported for formation reactions complexes. enthalpy changes all complexations found to be negative but entropy positive. While driving...
Five new mixed ligand Fe(III) complexes, namely, [FeL1(acac)] (L1Fe), [FeL2(acac)] (L2Fe), [FeL3(acac)] (L3Fe), [FeL4(acac)] (L4Fe), and [FeL5(acac)] (L5Fe), were synthesized from the reaction of iron(III) acetylacetonate with [ONS] donor dibasic tridentate symmetrical bisthiocarbohydrazone ligands. Synthesized complexes characterized infrared spectra, UV‐Vis mass elemental analysis, magnetic susceptibility measurements, thermogravimetric analysis. The molar conductance measurement in DMF...
In this study, individual and competitive adsorption of three cationic dye onto montmorillonite were investigated. Langmuir, Freundlich, Temkin, Dubinin–Radushkevich isotherm models used to analyze experimental data for dyes. Surface precipitation occured in the presence inert electrolyte because decreasing solubility dye. The organic was pH-independent a pH scale between 2 6. It is, thus, assumed that took place permanently negatively charged surface, which is surface site adsorbent as...
The new symmetrical bisimine (ONNO donor, salen type) Ni(II), Zn(II), and Fe(III) complexes were synthesized in one step from metal ions monoimine ligand (HL: 4‐amino‐3‐{[(2‐hydroxynaphthalen‐1‐yl)methylidene]amino}phenyl)(phenyl)methanone). characterized by analytical, spectral, conductance, magnetic, thermal data. According to these analysis results, while the ligand, spontaneously forming during complexation, is attached two nitrogen atoms phenolic oxygen (N 2 O ) all complexes, complex,...
This paper reports absorption-based CO_2 sensing of the pH-active Schiff base 2-[(2-hydroxymethylphenylimino) methyl]-5-bromo-phenol (SB) in an ethyl cellulose (EC) matrix with and without Teflon coating. The sensitivity SB dye EC was evaluated presence nonadecafluorodecanoic acid tetrabutyl ammonium hydroxide. When exposed to CO_2, films exhibited 76% overall relative signal change responded over a wide range: 1%-100 % (v/v). However, slope spectral response between 1% 5% (v/v) is more...