Ragip Adiguzel

Munzur University, Tunceli Vocational School · Head Department of Chemistry and Chemical Process Technologies/Laboratory Technology Program

In this study, firstly, bis(thiosemicarbazone) ligand [L: 2,2′-(2-(2-(4-methoxyphenyl)hydrazineylidene)cyclohexane-1,3-diylidene)bis(hydrazine-1-carbothioamide)] was synthesized by the condensation reaction of thiosemicarbazide and ketone compound (2-(2-(4-methoxyphenyl)hydrazone)cyclohexane-1,3-dione). The metal complexes were synthesized by the r...

In this study, cetyl alcohol (CA) (CH3(CH2)15OH), which is a fatty alcohol, was microencapsulated by the coacervation method with the titanium-n-butoxide (TNBO). Firstly, at the beginning of the experimental process by thermal and structural analyses, the CA was determined as having a phase change material (PCM) property, then it was microencapsula...

In this study, several metal(II) complexes (Fe, Co, Zn, and Ru) of an azo dye ligand (ADL) that, apart from pyrazole ring (PR), include anisole having (−OCH3) group at the m‐substitue of the phenyl (L: (E)‐4‐((3‐methoxyphenyl)diazenyl)‐3‐methyl‐1H‐pyrazol‐5‐amine) were prepared, characterized, and the biological activity studies were carried out. T...

Microencapsulation, PCM, Thermal Engineering

In this study, the novel azo dye FeII, CoII, ZnII, and RuII complexes with an azo dye ligand (L: (E)-4-((4-methoxyphenyl)diazenyl)-3-methyl-1H-pyrazol-5-amine) were synthesized. The structures of the complexes were characterized by FT-IR, elemental analysis, UV-Vis, mass spectra (FeII and CoII), NMR spectra (only diamagnetic ZnII and RuII), thermog...

Novel Ru(II) complexes of Shiff base derivatives of 3-[(4-amino-5-thioxo-1,2,4-triazole-3-yl)methyl]-2(3H)-benzoxazolone were synthesized. The ligands (1a-e) were confirmed by IR, ¹H NMR, and ¹³C NMR spectra (only 1b and 1c). Structures of the synthesized Ru(II) complexes (2a-e) were illuminated by elemental analysis, IR, ¹H NMR, ¹³C NMR, and mass...

In this work were specified catalytic activity of pyridine-substituted-bis-1,2,4-triazole (PBTT) derivative ligands 5,5′-(pyridine-2,5-diyl)bis(4-ethyl-4H-1,2,4-triazole-3-thiol) (L1) and 5,5′-(pyridine-2,5-diyl)bis(4-phenyl-4H-1,2,4-triazole-3-thiol) (L2) in biaryl synthesis in situ-reaction condition. Catalytic activities are determined in terms...

In this study, the optical parameters such as absorption coefficient, optical band gap, refractive index and angles of incident and refraction of the Hg(II) complex with 5d 10-configuration of the same ligand for dimethylsulfoxide (DMSO) and ethanol (EtOH) were examined. The effects on the optical properties of the Hg(II) complex of the solvents ha...

Background and Objective: Saccharin and saccharinate complexes and its anion have critical importance with biological, biochemical and pharmacological properties. The main objective of this study is to synthesize the novel mixed ligand complexes from the complexes [M(Sac)2(H2O)4]•2H2O [M: Mn(II), Co(II), Ni(II), Cu(II) and Cd(II)] with a second neu...

Background: Fe(II) and Zn(II) complex series have been synthesized from Schiff base ligands derived from furan-2-carbaldehyde and thiophene-2-carbaldehyde. Elemental, infrared, ultraviolet-visible, NMR and thermal analysis, also mass spectroscopy and magnetic susceptibility measurements were performed to explain the structures of these synthesized...

The novel mixed ligand-metal complexes with a general formula [M(Sac)2(H2O)2L2]-nH2O] [M = Mn(II), Co(N), Ni(II), Cu(II) and Cd(N), L = 5-Methly-4-(4-nitrophenylazo)-2H-pyrazole-3-ylamine (mnppa)] have been synthesized and characterized by elemental analyses, IR, UV-VIS, magnetic susceptibility mass spectra and thermogravimetry-differential thermal...

Öz Bu çalışmanın amacı, çalışan kimya mühendislerinin çalışma hayatındaki beklentilerini tespit etmektir. Bu amaçla, kimya mühendislerinin beklentileri, 26 sorudan oluşan bir anket aracılığıyla ölçülmüştür ve soruların analizinde SPSS-18 paket pro-gramından yararlanılmıştır. Anket çalışmasına 34 kadın ve 35 erkek olmak üzere toplam 69 kimya mühendi...

We investigated the optical properties and the transmittance characterizations of the stock solutions of the Co (II) and Ni(II) complexes of Saccharin and determined the molar extinction coefficients at different molarity. The molar extinction coefficients (ε) values of the Co (II) and Ni(II) complexes in the first region decrease with increasing m...

Some new Zn(II) and Cu(II) complexes [Cu(L1)(OAc)2]∙H2O, [Cu(L1)(NO3)H2O]∙NO3∙3.5H2O, [Zn(L1)(NO3)2]∙4.5H2O, [Zn(L1)(OAc)2(H2O)2]∙3H2O, [Cu2(L2)(OAc)4]∙2H2O∙2DMF, [Cu(L2)2]∙2NO3∙1.5DMF∙H2O, [Zn(L2)2(NO3)2]∙DMF and [Zn2(L2)(OAc)4(H2O)4]∙5H2O; L1 = 2-[2-(2-methoxyphenyl)hydrazono]cyclohexane-1,3- dione and L2 = 2-[2-(3-nitrophenyl)hydrazono]cyclohexa...

A new chelating ligand, 5,5-dimethyl-2-(2-(3-nitrophenyl) hydrazono)cyclohexane-1,3-dione (L), and four transition metal complexes were synthesized. The ligand and its complexes were characterized by IR, 1H and 13C-NMR spectra, elemental analyses, magnetic susceptibility, mass spectra, UV-Vis. and thermogravimetry-differential thermal analysis (TGA...

Crayfish (Astacus leptodactylus Eschscholtz, 1823) is the native crayfish species in Turkey. It was exported regularly to Western Europe. In this study, bioaccumulation and temporal trends of some trace elements (arsenic: As, cadmium: Cd, copper: Cu, mercury: Hg, lead: Pb, and zinc: Zn) in edible abdomen muscle of crayfish from Keban Dam Lake (Elaz...

The increased use of nanosized materials is likely to result in the release of these particles into the environment. It is, however, unclear if these materials are harmful to aquatic animals. In this study, the sublethal effects of exposure of low and high concentrations of titanium dioxide nanoparticles (TiO2 NPs) on goldfish (Carassius auratus) w...

Doğal bir antioksidan kaynağı olan bitkilerin antioksidan özelliklerinin belirlenmesi ile ilgili çalışmalar son zamanlarda büyük bir ivme ile artmaktadır. Özellikle halk arasında tıbbi amaçlı kullanılan bitkiler ile gıda sektöründe kullanılan bazı bitkiler antioksidan çalışmaların odak noktasını teşkil etmektedir. Ülkemizdeki endemik bitki türlerin...

Complexation reactions between water-soluble and -insoluble reactants were shown to occur in aqueous media in the presence of normal or reverse surfactant micelles, in significantly higher yields at lower temperatures compared to those achieved in neat organic solvents. The highest yield enhancement in the complexation of novel water-insoluble bis(...

In this study, some transition metal complexes of the bis(2-amino-1,3,4- thiadiazolyl)methane (L) derived from the condensation of malonic acid and thiosemicarbazide, have been synthesized and characterized by IR, 1H-NMR spectra, elemental analyses, magnetic susceptibility and thermogravimetry-differential thermal analysis (TGA-DTA). Coordination n...

In this study, the diazotized o-nitroaniline was coupled with malononitrile. The ring closure reaction of the obtained product with hydrazine monohydrate yielded 4-(2-nitrophenylazo)-1H-pyrazole-3,5-diamine (L). The structure of L has been elucidated by spectroscopic analyses. Then, novel Mn(II), Co(II), Ni(II) and Cd(II) complexes of L have been s...

In this study, the diazotized p-nitroaniline and p-methylaniline were coupled with malononitrile. The ring closure reaction of the obtained products with hydrazine monohydrate yielded 4-(4-methylphenylazo)-1H-pyrazole-3,5-diamine (L1) and 4-(4-nitrophenylazo)-1H-pyrazole- 3,5-diamine (L2). The structure of the ligands has been elucidated by spectro...

In this study, the ligands of bis(2-amino-1,3,4-thiadiazole) (L1), bis(2-amino-1,3,4- thiadiazolyl)methane (L2) and bis(2-amino-1,3,4-thiadiazolyl)benzene (L3) have been synthesized via the reactions of oxalic acid (1a), malonic acid (1b) and terephthalic acid (1c) with thiosemicarbazide. The structures of (L1), (L2) and (L3) compounds have been el...

In this study, the diazotized o-chloraniline was coupled with malononitrile. The ring closure reaction of the obtained product with hydrazine monohydrate yielded 4-(2-chlorophenylazo)-1H-pyrazole-3,5-diamine (L). The structure of ligand has been elucidated by spectroscopic analyses. Then, novel Ni(II), Cu(II), Cd(II) complexes of ligand have been s...

In this study, the ligand bis(2-amino-1,3,4-thiadiazole) (L) has been synthesized by the reactions of oxalic acid with thiosemicarbazide. The ligand and Ni(II), Cu(II), Zn(II), Cd(II) complexes have been synthesized and its structures of these compounds have been deter-mined by elemental analysis, spectrometric and TGA/DTA, magnetic susceptibility...