Kimya / Chemistry: Recent submissions

Now showing items 661-680 of 756

Synthesis, spectroscopy and electrochemical properties of highly soluble fluoro containing phthalocyanines

Kandaz, Mehmet; Yaraşır, Meryem Nilüfer (PERGAMON-ELSEVIER SCIENCE LTD, 2008)

2(3),9(10),16(17),23(24)-Tetrakis-4'-[3,5-bis-(trifluoromethyl)-phenoxy]-phthalocyanines, {M[Pc-beta(OBz-(CF3)(2))(4)]}, (M = Zn(II), Cu(II), Co(II) and Ni(II)) were synthesized and characterized by elemental analysis, ...
Preparation of activated carbon from sugar beet molasses and adsorption of methylene blue

Nebioğlu, Mehmet; Arslan, Mustafa; İmamoğlu, Mustafa; Zengin, Mustafa; Küçükislamoğlu, Mustafa (PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2008)

Four activated carbon samples were prepared from sugar beet molasses with zinc chloride as the chemical activating agent at different temperatures (600-800 degrees C) and residence carbonization times (0-120 min.) under ...
Equilibrium and kinetic data, and adsorption mechanism for adsorption of lead onto valonia tannin resin

Özacar, Mahmut; Şengil, İsmail Ayhan (ELSEVIER SCIENCE SA, 2008)

The adsorption of lead onto valonia tannin resin studied using a batch adsorber. The aim of this study was to understand the mechanisms that govern lead removal and find a suitable equilibrium isotherm and kinetic model ...
Removal of copper (II) and lead (II) ions from aqueous solutions by adsorption on activated carbon from a new precursor hazelnut husks

İmamoğlu, Mustafa (ELSEVIER SCIENCE BV, 2008)

Activated carbon was prepared from hazelnut husks with zinc chloride activation at 973 K in nitrogen atmosphere. BET surface area of the activated carbon was found 1092 m(2)g(-1). The removal of Cu (II) and Pb (II) ions ...
Electrocatalytic activity of phthalocyanines bearing thiophenes for hydrogen production from water

Kandaz, Mehmet (PERGAMON-ELSEVIER SCIENCE LTD, 2008)

in this work, voltammetric and spectroelectrochemical properties and electrocatalytic activities of thiophene-derivatized metallophthalocyanines for hydrogen production were investigated. Observation of reversible ...
Determination and analysis of the dispersive optical constants of the 5,5',6,6'-tetraphenyl-2,2'-bi([1,3]dithiolo[4,5-b][1,4]dithiinylidene)-DDQ complex thin film

Atalay, Yusuf; Başoğlu, Adil; Avcı, Davut; Arslan, Mustafa (ELSEVIER SCIENCE BV, 2008)

The synthesis and optical properties of the 5,5',6,6'-tetraphenyl-2,2'-bi([1,3]dithiolo [4,5-b] [1,4]dithiinylidene)-2,3-dichloro-5, 6-dicyano-p-benzoquinone (DDQ) complex thin film were investigated by the optical ...
Synthesis of bicyclo[2.2.2]octane-2,3,5,6,7,8 hexols (Bishomoinositols) as glycosidase inhibitors

Baran, Arif (AMER CHEMICAL SOC, 2008)

For the construction of the bicyclo[2.2.2] octane skeleton, 2,2-dimethyl-3a,7a-dihydro-1,3-benzodioxole was reacted with vinylene carbonate to give two isomeric cycloadditon products having the bicyclo[2.2.2]octane skeleton. ...
Evaporation induced self-assembly of zeolite - A micropatterns due to the stick-slip dynamics of contact line

Olgun, Uğursoy; Sevinç, Vahdettin (ELSEVIER SCIENCE SA, 2008)

In this study, a new surfactant-solvent system was described for the preparation of periodic stripe patterns of zeolite A on solid substrates. The evaporation induced self-assembly of zeolite A particles was due to the ...
Extraction of Germanium from Acidic Leach solutions by Liquid Membrane Techniqu

Kumbasar, Recep Ali (1999)
Biosorption of Cu(II) from aqueous solutions by mimosa tannin gel

Şengil, İsmail Ayhan; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2008)

The biosorption of Cu(II) from aqueous solutions by mimosa tannin resin (MTR) was investigated as a function of particle size, initial pH, contact time and initial metal ion concentration. The aim of this study was to ...
Separation of cobalt and nickel from acidic leach solutions by emulsion liquid membranes using Alamine 300 (TOA) as a mobile carrier

Kumbasar, Recep Ali; Tutkun, Osman (ELSEVIER SCIENCE BV, 2008)

An emulsion liquid membrane process using tri-n-octylamine (Alamine 300) to extract and separate cobalt from the acidic leach solutions has been presented. Liquid membrane consists of a diluent, a surfactant (ECA 4360J), ...
Equilibrium and kinetic data and process design for adsorption of Congo Red onto bentonite

Bulut, Emrah; Şengil, İsmail Ayhan (ELSEVIER SCIENCE BV, 2008)

The adsorption of Congo Red onto bentonite in a batch adsorber has been studied. Four kinetic models, the pseudo first- and second-order equations, the Elovich equation and the intraparticle diffusion equation, were selected ...
Bromination of 5-methoxyindane: Synthesis of new benzoindenone derivatives and ready access to 7H-Benzo[c]fluoren-7-one skeleton

Tutar, Ahmet (TAYLOR & FRANCIS INC, 2008)

The photobromination of 5-methoxyindane and 5-methoxyindanone was studied at both high and low temperatures. 1,2,3-Tribromo-6-methoxyindene was easily synthesized by photolytic bromination of 5-methoxyindane at low ...
A vic-dioxime ligand bearing fluorescent coumarin moieties and its complexes; preparation, spectroscopy, and electrochemistry

Kandaz, Mehmet (TAYLOR & FRANCIS LTD, 2008)

The synthesis of a new vic-dioxime ligand, N,N'(2)-dihydroxy-O-1,O-2-bis(4-methyl-2-oxo-2H-chromen-7-yl)oxalimidamid (LH2) (1), bearing functional coumarins and its soluble mono- {Ni(II), Cu(II), Co(II)} and dinuclear ...
Surfactant-assisted polyol preparation of nickel powders with different morphologies

Aydın, Ali Osman; Şişman, İlkay (DE GRUYTER OPEN LTD, 2008)

Sub-micrometer nickel powders of controlled size and morphology were produced by a surfactant-assisted polyol method, using ethylene glycol (EG) as solvent and reductant in the presence of sodium dodecyl sulfate (SDS) ...
(E, E)S, S '-bis(2-benzimidazolylmethyl) dithioglyoxime, synthesis and characterization of heterotrinuclear complexes of and determination of their metal contents by EDXRF analysis

Yıldız, Salih Zeki; Atalay, Yusuf (ELSEVIER SCIENCE SA, 2008)

A vicinal dioxime ligand with two 2-benzimidazolylmethyl groups, namely S,S'-bis(2-benzimidazolylmethyl) dithioglyoxine (H2L) and its axially pyridine and 2,6-dimethyl pyridine bonded Co(III) complexes were prepared according ...
Separation and recovery of Silver(I) ions from base metal ions by melamine-formaldehyde-thiourea (MFT) chelating resin

Gülfen, Mustafa (TAYLOR & FRANCIS INC, 2008)

Melamine-formaldehyde-thiourea (MFT) chelating resin were prepared using melamine (2,4,6-triamino-1,3,5-triazine), formaldehyde, and thiourea and this resin has been used for separation and recovery of silver(I) ions from ...
Optimum conditions for leaching calcined alunite ore in strong NaOH

Özacar, Mahmut; Şengil, İsmail Ayhan (MANEY PUBLISHING, 1999)

The dissolution of calcined alunite ore in NaOH solution was studied at temperatures ranging between 295-383 K. The effects of ore calcination time and temperature, reaction time and temperature, particle size and solid-liquid ...
Column solid phase extraction of copper and nickel on triethylenetetramine bonded silica gel for their atomic absorption spectrometric determination

İmamoğlu, Mustafa (TAYLOR & FRANCIS INC, 2008)

A procedure for the preconcentration of Cu(II) and Ni(II) is proposed using a minicolumn filled with silica gel modified by triethylenetetramine. The retained analytes on the modified silica gel were eluted with hydrochloric ...
Selective heavy metal receptor functional phthalocyanines bearing thiophenes: Synthesis, characterization, spectroscopy and electrochemistry

Yaraşır, Meryem Nilüfer; Kandaz, Mehmet (ELSEVIER SCI LTD, 2008)

Soft metal ion receptor 2,9,16,23-tetrakis-6-(-thiophene-2-carboxylate)-hexylthio-phthlocyaninato zinc(II) and cobalt(II) complexes derived from 6-(3,4-dicyanophenylthio) hexyl thiophene-2-carboxyl ate have been prepared ...