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Full-Text Articles in Physical Sciences and Mathematics
Optimizing The Coagulation/Flocculation Process For Bentonite Suspension With Poly(Acrylamide-Co-(N-Methyl-4-Vinylpyridinium Tosylate, Brahim Bouras, Tayeb Hocine, Kamel Ismet Benabadji, Karim Benhabib, Ali Mansri
Optimizing The Coagulation/Flocculation Process For Bentonite Suspension With Poly(Acrylamide-Co-(N-Methyl-4-Vinylpyridinium Tosylate, Brahim Bouras, Tayeb Hocine, Kamel Ismet Benabadji, Karim Benhabib, Ali Mansri
Turkish Journal of Chemistry
In this work, we are interested in the quaternization of poly(acrylamide-co-4-vinylpyridine) [AM7/VP10/0.1%/] by the methyl-tosylate CH$_{3}$TS. The obtained copolymer poly(acrylamide-co-(N-methyl-4-vinylpyridinium tosylate)) [AM7/VP10/0.1%/CTs] has been characterized by $^{1}$H NMR and UV-Vis spectroscopy. The macromolecular weight was determined by size exclusion chromatography as well as by viscosity. With the aim of removing turbidity by coagulation-flocculation from bentonite suspensions, the prepared copolymer was used as a flocculant. Several important parameters in the flocculation process, such as pH of water, initial turbidity, and flocculant concentration, were utilized for the optimization of wastewater treatment. Flocculation experiments were carried out in a conventional jar test where …
Synthesis And Characterizations Of Novel Thiazolyl-Thiadiazole Derivatives As Telomerase Activators, İsmai̇l Kayaği̇l, Ayşe Gül Mutlu, Ülkü Bayhan, İnanç Yilmaz, Şeref Demi̇rayak
Synthesis And Characterizations Of Novel Thiazolyl-Thiadiazole Derivatives As Telomerase Activators, İsmai̇l Kayaği̇l, Ayşe Gül Mutlu, Ülkü Bayhan, İnanç Yilmaz, Şeref Demi̇rayak
Turkish Journal of Chemistry
Pyridine-3/4-thiocarboxamide derivatives were used as starting materials for the synthesis of the target compounds. The pyridine-3/4-thiocarboxamide derivatives were reacted with ethyl 2-chloroacetoacetate in ethanol to give the thiazole derivatives (1, 2). The two ethyl thiazole-carboxylate derivatives (1, 2) thus obtained were treated with sodium hydroxide solution and ethanol and converted to carboxylic acids (3, 4). The carboxylic acid derivatives (3, 4) were reacted with thiosemicarbazide in phosphoroxy trichloride and aminothiadiazole rings (5, 6) were formed. Thus, two thiazolyl-thiadiazole amine derivatives (5, 6) were obtained. These two derivatives (5, 6) were converted into two chloroacetamidothiadiazole derivatives (7, 8) by reaction with …
Electrochemical Behavior And Voltammetric Determination Of Some Nitro-Substituted Benzamide Compounds, Özlem Sağlam, Ferah Cömert Önder, Tuğba Güngör, Mehmet Ay, Yusuf Di̇lgi̇n
Electrochemical Behavior And Voltammetric Determination Of Some Nitro-Substituted Benzamide Compounds, Özlem Sağlam, Ferah Cömert Önder, Tuğba Güngör, Mehmet Ay, Yusuf Di̇lgi̇n
Turkish Journal of Chemistry
Voltammetric behaviors of six nitro-substituted benzamides, which are potential prodrug candidates for nitroreductase-based cancer therapy, were investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The electrochemical behavior of aromatic nitro (ArNO$_{2})$ compounds by CV indicates that compounds involve various reduction/oxidation steps including the formation of aromatic nitro radical, nitroso, hydroxylamine, and amine groups. Applicability of the voltammetric determination of these prodrug candidates was studied by recording their DPVs, carried out in mixed media (Britton Robinson buffer solution $+$ DMF) at various pH values on a pencil graphite electrode (PGE). Results show that the PGE can offer a disposable, …
A Simple Automated Microplate Method For Determining Reducing Sugars In Food Extracts And Synthetic Serum Using Cupric-Neocuproine As Reductant, Mustafa Bener, Esi̇n Akyüz, Furkan Burak Şen, Kevser Sözgen Başkan, Esma Tütem, Mustafa Reşat Apak
A Simple Automated Microplate Method For Determining Reducing Sugars In Food Extracts And Synthetic Serum Using Cupric-Neocuproine As Reductant, Mustafa Bener, Esi̇n Akyüz, Furkan Burak Şen, Kevser Sözgen Başkan, Esma Tütem, Mustafa Reşat Apak
Turkish Journal of Chemistry
In the present work, a simple automated microplate method based on cupric ion reduction is described for determining total reducing sugars in food extracts and synthetic serum. The reaction of Cu(II)-Nc (cupric-neocuproine) with reducing sugars was performed in alkaline medium in microplates, and the absorbance of the formed highly colored Cu(I)-Nc chelate in a plate reader at 450 nm was recorded. The proposed method was applied to reducing sugars (glucose, fructose, galactose, maltose, and lactose) and their linear calibration curves were constructed. The detection and quantification limits (LOD and LOQ) for glucose were 0.14 and 0.46 $\mu $M, respectively. Absorbances …
An Ionic Liquid/Bismuth Film-Modified Sensor For The Electrochemical Detection Of Cefixime, Yeşi̇m Tuğçe Yaman, Gülçi̇n Bolat, Ceren Yardimci, Serdar Abaci
An Ionic Liquid/Bismuth Film-Modified Sensor For The Electrochemical Detection Of Cefixime, Yeşi̇m Tuğçe Yaman, Gülçi̇n Bolat, Ceren Yardimci, Serdar Abaci
Turkish Journal of Chemistry
A highly sensitive and simple method based on an ionic liquid/ex situ bismuth film-modified single-use pencil graphite electrode (IL/Bi/PGE) was offered for the electrochemical detection of cefixime (CEF) for the first time. The synergistic effects of the ionic liquid and bismuth film combination as the surface modifier remarkably improved the electrochemical response of the modified sensor. Anodic oxidation of CEF was observed at 0.9 V vs. Ag/AgCl/3 M KCl as one well-defined irreversible oxidation peak. Under optimum experimental conditions, the IL/Bi/PGE exhibited a linear relationship for CEF concentrations in the range of 0.005--0.5 $\mu $M (R$^{2}$ = 0.996) with a …
Synthesis And Evaluation Of Novel 1,3,4-Thiadiazole--Fluoroquinolone Hybrids As Antibacterial, Antituberculosis, And Anticancer Agents, Asli Demi̇rci̇, Kaan Gökçe Karayel, Esra Tatar, Si̇nem Öktem Okullu, Ni̇han Ünübol, Paki̇ze Nesli̇han Taşli, Zühtü Tanil Kocagöz, Fi̇kretti̇n Şahi̇n, İlkay Küçükgüzel
Synthesis And Evaluation Of Novel 1,3,4-Thiadiazole--Fluoroquinolone Hybrids As Antibacterial, Antituberculosis, And Anticancer Agents, Asli Demi̇rci̇, Kaan Gökçe Karayel, Esra Tatar, Si̇nem Öktem Okullu, Ni̇han Ünübol, Paki̇ze Nesli̇han Taşli, Zühtü Tanil Kocagöz, Fi̇kretti̇n Şahi̇n, İlkay Küçükgüzel
Turkish Journal of Chemistry
A series of 5-substituted-1,3,4-thiadiazole-based fluoroquinolone derivatives were designed as potential antibacterial and anticancer agents using a molecular hybridization approach. The target compounds 16-25 were synthesized by reacting the corresponding $N$-(5-substituted-1,3,4-thiadiazol-2-yl)-2-chloroacetamides with ciprofloxacin or norfloxacin. The purity and identity of the synthesized compounds were determined by the use of chromatographic and spectral techniques (NMR, IR, MS, etc.) besides elemental analysis. Antibacterial, antituberculosis, and anticancer activity of the target compounds were evaluated against selected strains and cancer cell lines. Compound 20 was appreciated as the most active agent representing antibacterial activity against Escherichia coli and Staphylococcus aureus with MIC values of 4 …
Computational Investigation Of Intramolecular Reorganization Energy In Diketopyrrolopyrrole (Dpp) Derivatives, Şule Atahan Evrenk
Computational Investigation Of Intramolecular Reorganization Energy In Diketopyrrolopyrrole (Dpp) Derivatives, Şule Atahan Evrenk
Turkish Journal of Chemistry
Intramolecular reorganization energy (RE) of molecules derived from the diketopyrrolopyrrole (DPP) unit has been studied using B3LYP/6-31G(d,p) theory. It was found that the replacement of the oxygen atoms with sulfur in the DPP unit led to a smaller RE for both the hole and electron transfer processes. One disadvantage of the sulfur replacement is the twist of the conjugated backbone, which might impair the $\pi - \pi $ interactions in the solid state. The RE calculated from the adiabatic potential energy surfaces and that derived from the normal mode analysis agreed well for both systems. Electronic structure data showed that …
Efficient Reductive Claisen Rearrangement Of Prop-2'-Enyloxyanthraquinones And 2'-Chloroprop-2'-Enyloxyanthraquinones With Iron Powder In Ionic Liquids, Samaneh Nadali, Ali Khoshroo, Ghasem Aghapour
Efficient Reductive Claisen Rearrangement Of Prop-2'-Enyloxyanthraquinones And 2'-Chloroprop-2'-Enyloxyanthraquinones With Iron Powder In Ionic Liquids, Samaneh Nadali, Ali Khoshroo, Ghasem Aghapour
Turkish Journal of Chemistry
A rapid and selective iron-mediated reductive Claisen rearrangement of various prop-2'-enyloxyanthraquinones and 2'-chloroprop-2'-enyloxyanthraquinones to 1-hydroxy-2-(prop-2'-enyl)anthraquinones and anthrafurandiones is presented. All reactions are carried out in a mixture of ionic liquids, [Bzmim]Cl (1-benzyl-3-methylimidazolium chloride) and [Hmim]BF$_{4}$ (1-methylimidazolium tetrafluoroborate), in short reaction times (5-35 min). Our study showed that 1-(prop-2'-enyloxy)anthraquinone is more active than 1-(2'-chloroprop-2'-enyloxy)anthraquinone to perform this rearrangement.
Removal Of Toxic Metals From Canola Oil By Newly Synthesized Calixarene-Based Resin, Muhammad Afzal Kamboh, Shahabuddi̇n Memon, Liaquat Ali Zardari, Hamid Rashidi Nodeh, Syed Tufail Hussain Sherazi, Mustafa Yilmaz
Removal Of Toxic Metals From Canola Oil By Newly Synthesized Calixarene-Based Resin, Muhammad Afzal Kamboh, Shahabuddi̇n Memon, Liaquat Ali Zardari, Hamid Rashidi Nodeh, Syed Tufail Hussain Sherazi, Mustafa Yilmaz
Turkish Journal of Chemistry
This study describes the synthesis, characterization, and application of a new $p-$sulfonatocalix[4]arene-based silica resin (calix-resin 5) for the extraction of selected metals, namely Pb, Cd, Co, Ni, Cu and Fe, from canola oil. Synthesis, morphology, purity, and elemental composition of calix-resin 5 were analyzed by FT-IR spectroscopy, scanning electron microscopy, and energy-dispersive spectroscopy. The metal extraction efficiency of calix-resin 5 was evaluated through the batch-wise method with a flame and graphite furnace atomic absorption spectrometer following the wet acid digestion procedure. The results obtained showed that the newly fabricated adsorbent material calix-resin 5 is an efficient adsorbent and exhibits great …
Synthesis Of Novel Sn38-Aspirin Prodrugs For The Treatment Of Hepatocellular Carcinoma, Zhimin Chen, Yi Luo, Aiping Fang, Chen Fan, Chenjuan Zeng
Synthesis Of Novel Sn38-Aspirin Prodrugs For The Treatment Of Hepatocellular Carcinoma, Zhimin Chen, Yi Luo, Aiping Fang, Chen Fan, Chenjuan Zeng
Turkish Journal of Chemistry
Hepatocellular carcinoma (HCC) is the most common primary liver malignancy and is a leading cause of cancer-related death worldwide. However, there is no effective chemotherapeutic treatment for HCC and its prognosis remains poor. Consequently, it is urgent to find an efficient antitumor agent to treat HCC. In this study, 7-ethyl-10-hydroxycamptothecin (SN38), the bioactive metabolite of the anticancer drug irinotecan (CPT-11), which is 100-1000 times more potent than CPT-11, was coupled with aspirin to give 4 prodrugs. Their structures were characterized by $^{1}$H~NMR and elemental analysis. The in vitro anticancer activities of these compounds on two human hepatocellular carcinoma cell lines …
Analysis Of Electrochemical Noise In Nicd Batteries Throughout Their Lifetime, Burak Ülgüt
Analysis Of Electrochemical Noise In Nicd Batteries Throughout Their Lifetime, Burak Ülgüt
Turkish Journal of Chemistry
Electrochemical noise measurements have been applied to electrochemical systems that show stochastic behavior. The standard area of study that benefits from this stochastic analysis is localized corrosion modes like pitting and crevice corrosion. Application of electrochemical noise measurements to battery systems, though rare, is recently becoming more popular. The present contribution first establishes a method of analyzing electrochemical voltage noise data for NiCd batteries, then follows four samples of batteries in terms of voltage noise throughout their lifetimes. The noises exhibited by battery systems are small, but finite. This noise is expected to be due to variations in the electrochemistry …
Facile Synthesis Of Iro$_{2}$ Nanoclusters And Their Application As Catalysts In The Degradation Of Azo Dyes, Rajni Lasyal, Anjali Goel
Facile Synthesis Of Iro$_{2}$ Nanoclusters And Their Application As Catalysts In The Degradation Of Azo Dyes, Rajni Lasyal, Anjali Goel
Turkish Journal of Chemistry
A robust synthesis of iridium oxide (IrO$_{2})$ nanoclusters using methanol as a reducing agent via the chemical reduction method is reported in this article. Polyvinylpyrrolidone (PVP) and polyoxyethylene(23) lauryl ether (POLE) were used as stabilizers. The formation of IrO$_{2}$ nanoclusters was confirmed by the appearance of new absorption peak at 230 nm in UV-vis spectra. XRD and TEM were used to determine the degree of crystallinity and size of nanoclusters, respectively. Further characterization studies were carried out by FT-IR spectroscopy to investigate the coordination between IrO$_{2}$ nanoclusters and stabilizers. The size of the nanoclusters was found to be a factor …
One-Step Potentiostatic Codeposition And Electrochemical Studies Of Poly(1-Pyrenyl)-2,5-Di(2-Thienyl)Pyrrole-Co-Pyrrole) Film For Electrochemical Supercapacitors, Hakan Görçay, İlhami̇ Çeli̇k, Yücel Şahi̇n
One-Step Potentiostatic Codeposition And Electrochemical Studies Of Poly(1-Pyrenyl)-2,5-Di(2-Thienyl)Pyrrole-Co-Pyrrole) Film For Electrochemical Supercapacitors, Hakan Görçay, İlhami̇ Çeli̇k, Yücel Şahi̇n
Turkish Journal of Chemistry
In this paper, we report a simple, low-cost, and environmentally friendly electrochemical method to obtain a novel copolymer consisting of 1-pyrenyl-2,5-di(2-thienyl)pyrrole and pyrrole on a pencil graphite electrode (PGE). Poly(1-pyrenyl)-2,5-di(2-thienyl)pyrrole-co-pyrrole) that is P(PyrPy-co-Py) film was prepared by one-step potentiostatic codeposition in an ethanol solution containing PyrPy and Py monomers for supercapacitor applications. The electrodeposition of homopolymer and copolymer modified electrodes was carried out on the surface of the PGE via chronocoulometry. For comparison, P(Py)/PGE and P(PyrPy)/PGE were also electrochemically synthesized under the same reaction conditions. The surface morphologies of all the electrode materials were analyzed by field emission scanning electron …
Voltammetric Determination Of Phenmedipham Herbicide Using A Multiwalled Carbon Nanotube Paste Electrode, Ersi̇n Demi̇r, Recai̇ İnam
Voltammetric Determination Of Phenmedipham Herbicide Using A Multiwalled Carbon Nanotube Paste Electrode, Ersi̇n Demi̇r, Recai̇ İnam
Turkish Journal of Chemistry
Phenmedipham is an herbicide used especially in the sugar beet harvest to fight against broad-leaved weeds and studies of its voltammetric behavior and detection have not been done before. The superior properties of carbon nanotubes such as electrical conductivity, mechanical strength, and wide potential ranges make them attractive for chemical sensors and the phenmedipham compound gave an oxidation peak at $+$1320 mV (vs. Ag/AgCl) on the nanostructured multiwalled carbon nanotube paste electrode. Square wave voltammetric measurements recorded for phenmedipham showed that the peak current increased linearly between 0.02 and 2.0 mg/L with a regression coefficient of $r$ = 0.9989, and …
New Triplet Silylenes M-Si-M$'$--X Along With Some Unusual Cyclic Forms (M = Li, Na, And K; M$'$ = Be, Mg, And Ca; X = F, Cl, And Br), Samaneh Ashenagar, Mohamad Zaman Kassaee
New Triplet Silylenes M-Si-M$'$--X Along With Some Unusual Cyclic Forms (M = Li, Na, And K; M$'$ = Be, Mg, And Ca; X = F, Cl, And Br), Samaneh Ashenagar, Mohamad Zaman Kassaee
Turkish Journal of Chemistry
Comparison of 54 M-Si--M$'$-X species is carried out using quantum mechanical ab initio and DFT computations at B3LYP/6-311$++$G**, QCISD(T)/6-311$++$G**, and CCSD(T)/6-311$++$G** levels of theory (M = Li, Na, K; M$'$ = Be, Mg, Ca, and X = F, Cl, Br). All triplet species with M = K appear more linear than their corresponding ones with Li and Na. The electronegativity reactivity descriptor for each halogen (X = F, Cl, Br) is used as a tool to evaluate the interrelated properties of these silylenes. Stability, assumed as singlet-triplet energy difference ($\Delta E_{S-T})$ for each series depends on the substituent's electropositivity, analyzed …
A Novel One-Pot And Rapid Synthesis Of Polyfunctionalized Benzo[A]Pyrimido[5',4':5,6] Pyrido[2,3-C]Phenazine Derivatives Under Microwave Irradiation, Mahdieh Tabibian, Razieh Mohebat, Masoumeh Tabatabaee
A Novel One-Pot And Rapid Synthesis Of Polyfunctionalized Benzo[A]Pyrimido[5',4':5,6] Pyrido[2,3-C]Phenazine Derivatives Under Microwave Irradiation, Mahdieh Tabibian, Razieh Mohebat, Masoumeh Tabatabaee
Turkish Journal of Chemistry
A one-pot, environmentally friendly, and efficient protocol for the synthesis of novel polyfunctionalized benzo[$a$]pyrimido[5',4':5,6]pyrido[2,3-$c$]phenazine derivatives has been reported by a one-pot, four-component sequential reaction between 2-hydroxynaphthalene-1,4-dione, benzene-1,2-diamines, benzaldehydes, and 6-amino-1,3-dimethyluracil in the presence of $p$-TSA as a nontoxic, inexpensive, ecofriendly, and efficacious solid acid catalyst. Two C-C bonds, two C=N bonds, and one C-N bond, as well as two new rings, were formed in this reaction. Through this procedure, compounds with substantial biological and pharmaceutical properties are generated in a single operation. Factors such as high yields, less reaction time, operational simplicity, and lack of any dangerous reagents/solvents have made …
Development Of A Nanoscale-Based Optical Chemical Sensor For The Detection Of No Radical, Özlem Öter, Aki̇f Ci̇han Aydin, Merve Zeyrek Ongun, Erdal Çeli̇k
Development Of A Nanoscale-Based Optical Chemical Sensor For The Detection Of No Radical, Özlem Öter, Aki̇f Ci̇han Aydin, Merve Zeyrek Ongun, Erdal Çeli̇k
Turkish Journal of Chemistry
Nitric oxide is one of the most important biochemical parameters in biological processes; it is also known as carcinogenic. There is need for the design of stable and durable solid phase nitric oxide sensors. In this study, we immobilized the nitric oxide sensitive molecules pyrene, tris(2,2'-bipyrdyl)dichlororuthenium(II) hexahydrate (Ru(bipy)$_{3}^{2+})$, and magnesium phthalocyanine (Mg-Pc) for the first time in polymeric or glassy matrices. We applied silver nanoparticles and ionic liquids in the fabrication process of polymeric electrospun fibers and thin films. We compared their NO sensitivity in micelle solutions that mimic the cell medium by both steady state and lifetime-based fluorescence measurements. …
New $N$-4 Piperazinyl Derivatives Of Norfloxacin: Design, Synthesis, And Correlation Of Calculated Physicochemical Parameters With Antibacterial Activity, Gamal El-Din Abou Rahma, Samar Abbas, Mai Shoman, Ibtihal Samir, Rehab Abd El-Baky
New $N$-4 Piperazinyl Derivatives Of Norfloxacin: Design, Synthesis, And Correlation Of Calculated Physicochemical Parameters With Antibacterial Activity, Gamal El-Din Abou Rahma, Samar Abbas, Mai Shoman, Ibtihal Samir, Rehab Abd El-Baky
Turkish Journal of Chemistry
A group of $N-$4 piperazinyl derivatives of norfloxacin was synthesized and identified by different spectroscopic techniques. The $N-$4 piperazinyl substituent in target compounds 2a-2k, 3a-3c, and 4a and 4b was designed to have different electronic, steric, and physicochemical properties. The antibacterial activity of the newly synthesized compounds was evaluated against Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, and Staphylococcus aureus strains using norfloxacin as a reference. Results showed that most of the tested compounds had higher activity against E. coli and K. pneumoniae than norfloxacin, whereas only five derivatives were more active against P. aeruginosa. On the other hand, all derivatives …
The Synthesis Of New 3,4-(Bisaryl)-1,8-Naphthalimide And 2,3-(Bisaryl)-7$H$-Benzimidazo[2,1-A]Benzo[D]Isoquinolin-7-One Compounds And An Investigation Of Their Photochromic Properties, Ersi̇n Orhan, Mahmut Köse, Tolga Yazan
The Synthesis Of New 3,4-(Bisaryl)-1,8-Naphthalimide And 2,3-(Bisaryl)-7$H$-Benzimidazo[2,1-A]Benzo[D]Isoquinolin-7-One Compounds And An Investigation Of Their Photochromic Properties, Ersi̇n Orhan, Mahmut Köse, Tolga Yazan
Turkish Journal of Chemistry
Three new photochromic compounds, 3-(2,5-dimethyl-3-thienyl)-4-(2-phenyl-5-methyl-4-thiazolyl)-1,8-napht- halimide (1-O), 2,3-bis(2-phenyl-5-methyl-4-thiazolyl)-7$H$-benzimidazo[2,1-a]benzo[de]isoquinolin-7-one (2-O), and 2,5-dimethyl-3-thienyl)-7$H$-benzimidazo[2,1-a]benzo[de]isoquinolin-7-one (3-O), were synthesized and their photochromic properties were studied. Compound 1-O was synthesized by two consecutive Suzuki coupling reactions using 2,5-dimethylthiophene-3-boronic acid and 5-methyl-2-phenylthiazole-4-boronic acid. Photochromic compounds 2-O and 3-O were prepared by multistep reactions starting with 3-iodo-4-bromo-1,8-naphthalic anhydride and 2,5-dimethylthiophene-3-boronic acid or 2-phenyl-5-methylthiazole-4-boronic acid. All photochromic compounds showed a color change from colorless (or light yellow) to blue-green, purple, or orange colors (depending on the nature of the structures) on exposure to UV light at 365 nm in ethyl acetate solutions. The colored solutions can be reversed to …
Synthesis, Characterization, And Evaluation Of Toxicity Of Quaternary Ammonium Chlorides Of Glucose-Based Este, Anna Parus, Grzegorz Framski
Synthesis, Characterization, And Evaluation Of Toxicity Of Quaternary Ammonium Chlorides Of Glucose-Based Este, Anna Parus, Grzegorz Framski
Turkish Journal of Chemistry
This study presents the synthesis of glucose-based surfactants including quaternary ammonium salts. Their surface properties and influence on the soil environment were investigated. The synthesized quaternary ammonium chlorides of glucose-based ester exhibited good surface tension reduction properties and formed stable foam in contact with water. The results showed that quaternary ester ammonium salts affect the activation of metals (nickel and cadmium) from the soil matrix after their introduction into the soil environment. This phenomenon can increase the bioavailability of these metals. The introduction of glucose surfactants to the soil increased microorganism activity, which may indicate that these compounds were used …
Synthesis, Characterization, And Evaluation Of Antioxidant Activity Of New $\Gamma $- And $\Delta $-Imino Esters, Hasni̇ye Yaşa
Synthesis, Characterization, And Evaluation Of Antioxidant Activity Of New $\Gamma $- And $\Delta $-Imino Esters, Hasni̇ye Yaşa
Turkish Journal of Chemistry
New Schiff bases were synthesized by condensation of methyl-5-(furan-2-yl)-5-oxopentanoate, methyl-4-(furan-2-yl)-4-oxobutanoate, methyl-5-(thiophene-2-yl)-5-oxopentanoate, and methyl-4-(thiophene-2-yl)-4-oxobutanoate with $p$-anisidine and $n$-butylamine. The structures of these synthesized compounds were clarified on the basis of elemental analysis, IR, $^{1}$H NMR, $^{13}$C NMR, and GC-MS spectroscopic techniques. In addition, antioxidant activity of the synthesized compounds was evaluated on the basis of DPPH radical.
Synthesis, Molecular Docking, And Pharmacological Evaluation Of Halobenzodithiophene Derivatives Against Alpha-Glucosidase, Urease, And Free Radical Production, Ghulam Abbas, Zahid Hassan, Ahmed Al-Harrasi, Syed Aun Muhammad, Ahood Juma Al-Quraini1, Zahra Khamis Al-Maani1, Ahmed Mohammed Al-Adawai
Synthesis, Molecular Docking, And Pharmacological Evaluation Of Halobenzodithiophene Derivatives Against Alpha-Glucosidase, Urease, And Free Radical Production, Ghulam Abbas, Zahid Hassan, Ahmed Al-Harrasi, Syed Aun Muhammad, Ahood Juma Al-Quraini1, Zahra Khamis Al-Maani1, Ahmed Mohammed Al-Adawai
Turkish Journal of Chemistry
Benzodithiophenes are heterocyclic compounds that have various medicinal and industrial applications. In the present study, halobenzodithiophene, the simplest benzofused thiophene, and its derivatives were synthesized and evaluated against alpha-glucosidase, urease, and free radical production. In the alpha-glucosidase inhibition assay, compound 2,2-bisbenzothiophne (1) exhibited potent activity with IC$_{50}$ = 135 $\pm $ 0.51 $\mu $M, while its derivative 2,7-bis(butoxycarbonyl)-3,6-dichlorobenzo[1,2-$b$;6,5-$b$']dithiophene (2) exhibited promising inhibition with IC$_{50}$ = 263 $\pm $ 0.32 $\mu $M. In the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging assay, compound 2 exhibited promising activity with IC$_{50}$ = 33 $\pm $ 0.42 $\mu $M, while compound 1 showed moderate inhibition in the urease …
The Design And Synthesis Of A Photo-Controlled, Peptide-Based Potential Drug Carrier, Melek Parlak Khali̇ly, Sali̇h Özçubukçu
The Design And Synthesis Of A Photo-Controlled, Peptide-Based Potential Drug Carrier, Melek Parlak Khali̇ly, Sali̇h Özçubukçu
Turkish Journal of Chemistry
Our focus in this study is on the design and synthesis of a light-responsive peptide-based nanocarrier in order to develop effective and biocompatible drug delivery systems. The synthesized nanocarrier is basically composed of peptide amphiphiles comprising a micelle forming a Pro-Pro-Pro-Lys-Lys-Lys peptide sequence with an attached anthracene fluorophore. Anthracene containing an inner core of the micelle can serve as a storage site for poorly water-soluble drugs. Moreover, anthracenes that come in close proximity with the formation of micellar structures can undergo photodimerization upon irradiation at 365 nm, which disrupts the micelle structures formed by the self-assembly of the peptide amphiphiles. …
Use Of Calcined Layered Double Hydroxide [Zn$_{2}$-Al-Co$_{3}$] For Removal Of Textile Dye Acid Green 1 From Wastewater: Kinetic, Equilibrium, Comparative, And Recycling Studies, El Hassane Mourid, Mohamed Lakraimi, Souad El Abridi, Lhaj Benaziz, El Hassan Elkhattabi, Moha Berraho
Use Of Calcined Layered Double Hydroxide [Zn$_{2}$-Al-Co$_{3}$] For Removal Of Textile Dye Acid Green 1 From Wastewater: Kinetic, Equilibrium, Comparative, And Recycling Studies, El Hassane Mourid, Mohamed Lakraimi, Souad El Abridi, Lhaj Benaziz, El Hassan Elkhattabi, Moha Berraho
Turkish Journal of Chemistry
In the present study, calcined layered double hydroxides (CLDHs) were obtained by heating [Zn$_{2}$-Al-CO$_{3}$] at 500 $^{\circ}$C. The adsorption of the textile dye acid green 1 (AG1) by CLDH was carried out at different pH levels, adsorbent--adsorbate contact times, and AG1/CLDH mass ratios. Equilibrium at room temperature was reached after 24 h, which was confirmed by the kinetic modeling of the experimental data by the pseudo-second-order model. The adsorption is described by a Langmuir-type isotherm. The comparative study of adsorption isotherms in calcined and uncalcined phases reveals that the former could be a good candidate for trapping such pollutants. After …
Syntheses And Characterizations Of Cyclotriphosphazenes Containing A 4-Oxy-1-Naphthaldehyde Group, Hani̇fe İbi̇şoğlu, Esra Tanriverdi̇ Eçi̇k, Gönül Yeni̇lmez Çi̇ftçi̇
Syntheses And Characterizations Of Cyclotriphosphazenes Containing A 4-Oxy-1-Naphthaldehyde Group, Hani̇fe İbi̇şoğlu, Esra Tanriverdi̇ Eçi̇k, Gönül Yeni̇lmez Çi̇ftçi̇
Turkish Journal of Chemistry
The nucleophilic substitution reaction of hexachlorocyclotriphosphazene (N$_{3}$P$_{3}$Cl$_{6}$, trimer) (1) with 4-hydroxy-1-naphthaldehyde (2) has been investigated for the first time. 4$^{{\prime}} $-Oxy-1$^{{\prime}} $-naphthaldehyde substituted mono- (3), bis- (4), and tris- (5) cyclotriphosphazenes were obtained from the nucleophilic substitution of compound 1 with 2 in a 1:2 molar ratio in the presence of Cs$_{2}$CO$_{3}$ in acetone at reflux. The pentakis-(6) and hexakis-substituted (7) cyclotriphosphazenes were prepared from the reaction of 1 with 2 in a 1:7 molar ratio using K$_{2}$CO$_{3}$ as a proton abstractor in tetrahydrofuran at room temperature. The structures of the new compounds (3-7) were determined by elemental analysis, FT-IR, …
A Sample Stacking-Capillary Electrophoresis Method For Simultaneous Determination Of Nitrate And Thiocyanate Ions Of Ultra-Heat-Treated Milk Samples, Fi̇li̇z Tezcan
Turkish Journal of Chemistry
Ultra-heat-treated (UHT) cow milk is mostly consumed in Turkey. Heating milk can cause some chemical and biochemical changes that affect different components of milk. However, studies on the constituents of UHT milk are scare. In the present study, nitrate and thiocyanate contents of commercial UHT~whole cow milk were determined simultaneously by sample stacking-capillary electrophoresis. The best separation of nitrate and thiocyanate ions was performed by reducing the electroosmotic flow at pH 4.0 using 30 mM formic acid and 30 mM sodium sulfate containing separation electrolyte. Analysis was completed in less than 3 min. The limits of detection obtained at a …
Synthesis, Sintering, Electrical Properties, And Sodium Migration Pathways Of New Lyonsite Na$_{2}$Co$_{2}$(Moo$_{4})_{3}$, Rawia Nasri, Riadh Marzouki, Samuel Georges, Said Obbade, Mohamed Faouzi Zid
Synthesis, Sintering, Electrical Properties, And Sodium Migration Pathways Of New Lyonsite Na$_{2}$Co$_{2}$(Moo$_{4})_{3}$, Rawia Nasri, Riadh Marzouki, Samuel Georges, Said Obbade, Mohamed Faouzi Zid
Turkish Journal of Chemistry
A new double molybdate Na$_{2}$Co$_{2}$(MoO$_{4})_{3}$ was synthesized via solid-state reaction and characterized by single-crystal X-ray diffraction (XRD). This compound is a new member of the lyonsite structure type. It crystallized in the orthorhombic system, space group Pnma with cell parameters $a$ = 5.272(2) Å, $b$ = 10.816(3) Å, and $c$ = 18.064(3) Å. The structure can be described as a three-dimensional framework with hexagonal tunnels in which the Na$^{+}$ cations lie. The obtained structural model is supported by charge distribution analysis and bond valence sum validation tools. Fourier-transform infrared spectroscopy and scanning electron microscopy analyses were carried out. Ball milling …
Thermolytic Synthesis Of Cobalt And Cobalt Sulfide Nanoparticles Using Cobalt(Ii) N$\Wedge $O Schiff Base Complexes As Single Molecular Precursors, Sandile H. Khoza, Siphamandla C. Masikane, Sixberth Mlowe, Itegbeyogene P. Ezekiel, Thomas Moyo, Neerish Revaprasadu
Thermolytic Synthesis Of Cobalt And Cobalt Sulfide Nanoparticles Using Cobalt(Ii) N$\Wedge $O Schiff Base Complexes As Single Molecular Precursors, Sandile H. Khoza, Siphamandla C. Masikane, Sixberth Mlowe, Itegbeyogene P. Ezekiel, Thomas Moyo, Neerish Revaprasadu
Turkish Journal of Chemistry
Two novel N$\wedge $O-type Schiff base ligands and the corresponding Co(II) complexes are reported. Thermogravimetric analysis indicated that the complexes are potential molecular precursors for the fabrication of cobalt and cobalt-containing nanomaterials. The significant difference in the thermal decomposition profiles is recognized as an influence of structural differences on the complexes. Thus, the complexes were thermally decomposed using the melt and hot injection methods to examine the properties of the obtained cobalt and cobalt sulfide nanoparticles, respectively. The reaction parameters employed during the fabrication processes, in addition to structural differences, influenced the morphological and crystallographic phases and magnetic properties of …
Preparation And Characterization Of Photocatalytic Tio$_{2}$/Glymo Nanocomposite Films, Esi̇n Akarsu, Hasan Erdem Çamurlu
Preparation And Characterization Of Photocatalytic Tio$_{2}$/Glymo Nanocomposite Films, Esi̇n Akarsu, Hasan Erdem Çamurlu
Turkish Journal of Chemistry
The reflux method was utilized for the synthesis of 5% Sn-doped TiO$_{2}$ nanopowder. Surfaces of the TiO$_{2}$ particles were modified with 3-glycidoxypropyltrimethoxysilane (glymo) and glass surfaces were coated with this solution by a spin-coating process. Molar ratios of TiO$_{2}$:glymo were 0.25, 0.5, 2.5, and 7.5 in the films. Nanocomposite films were cured at 130 $^{\circ}$C. Adhesions of the obtained films were classified as 5B and pencil hardness increased with the increase in the ratio of the TiO$_{2}$ in the films. Film thickness decreased from 5 $\mu $m to 0.3 $\mu $m when TiO$_{2}$:glymo was increased from 0.25 to 7.5. The …
Experimental And Theoretical Studies On Cis-Dioxomolybdenum(Vi) Complexes Of Onn-Donor~Thiosemicarbazone, Berat İlhan Ceylan, Ayberk Yilmaz, Olcay Bölükbaşi Yalçinkaya, Bahri̇ Ülküseven
Experimental And Theoretical Studies On Cis-Dioxomolybdenum(Vi) Complexes Of Onn-Donor~Thiosemicarbazone, Berat İlhan Ceylan, Ayberk Yilmaz, Olcay Bölükbaşi Yalçinkaya, Bahri̇ Ülküseven
Turkish Journal of Chemistry
Cis-dioxomolybdenum(VI) chelate complexes with 5-chloro-2-hydroxybenzophenone S-methyl-4-phenylthiose- micarbazone (L) were synthesized in the general formula (MoO$_{2}$(L)D), where D is an odd- or even-numbered alcohol (methanol (1), ethanol (2), n-propanol (3), n-butanol (4), and allyl alcohol (5)). The structures of 1-5 were verified by elemental analysis, Fourier transform infrared (FT-IR), and $^{1}$H NMR spectra. Complex 5 crystallizes in the monoclinic space group P21/n, and its crystalline data showed a dimeric structure formed by a pair of intermolecular hydrogen bonds with 1.92 Å. These dimers are stacked in a similar crystalline structure as a single molecule. The experimental data were compared with the …