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Full-Text Articles in Chemistry
Supercritical Carbon Dioxide Extraction Of Usnea Longissima (L.) Ach.: Optimization By Box-Behnken Design (Bbd), Ceren Ati̇la Di̇nçer, Ceren Gökalp, Bengü Geti̇ren, Ati̇la Yildiz, Nuray Yildiz
Supercritical Carbon Dioxide Extraction Of Usnea Longissima (L.) Ach.: Optimization By Box-Behnken Design (Bbd), Ceren Ati̇la Di̇nçer, Ceren Gökalp, Bengü Geti̇ren, Ati̇la Yildiz, Nuray Yildiz
Turkish Journal of Chemistry
Usnic acid (UA) was extracted from Usnea longissima (L.) Ach. in supercritical carbon dioxide (SC-CO2) medium. The selected process parameters were extraction temperature (35-45 °C), amount of co-solvent (0%-5%) and extraction time (5-9 h). These parameters were applied to Box-Behnken design (BBD) belonging to response surface methodology (RSM) to determine optimum process parameters for the highest amount of UA in the extract. g UA/100g lichen, extraction yield % and UA content values were calculated in the range of 0.045-0.317, 2.77-5.4 and 71%-82% in different experimental conditions, respectively. The optimum conditions were predicted as 42 °C, 4.3% (ethanol) and 7.48 h. …
Preparation And Characterization Of Templated Porous Carbons From Sucrose By One-Pot Method And Application As A Co2 Adsorbent, Meltem Gürbüz, Fatma Tümsek
Preparation And Characterization Of Templated Porous Carbons From Sucrose By One-Pot Method And Application As A Co2 Adsorbent, Meltem Gürbüz, Fatma Tümsek
Turkish Journal of Chemistry
The templated porous carbons were prepared from sucrose by one-pot method. In this method in which the pre-synthesis of the hard template is eliminated, the porous carbons were produced by organic-inorganic self-assembly of sucrose, tetraethyl ortosilicate (TEOS), Pluronic P123 and n-butanol in an acidic medium, and subsequent carbonization. The synthesis parameters such as sucrose amount, TEOS molar ratio and carbonization temperature were evaluated for describing their effects on the pore structures of the synthesized carbons. The prepared porous carbons were characterized by N2 adsorption, thermogravimetric analysis (TGA), Raman spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission …
Advances In Polymer Based Friedlander Quinoline Synthesis, Rajendra Patil, Jagdish Chavan, Shivnath Patel, Anil Beldar
Advances In Polymer Based Friedlander Quinoline Synthesis, Rajendra Patil, Jagdish Chavan, Shivnath Patel, Anil Beldar
Turkish Journal of Chemistry
Nitrogen containing heterocyclic compounds has acquired their remarkable and distinct place in the wide area of organic synthesis due to the broad range of applications. Among them, quinoline motifs have attracted researchers in the synthetic chemistry because of its presence in the large number of pharmacologically active compounds. Different methods for synthesis of quinoline derivatives are reported, among them the Friedlander synthesis have provided comparatively more efficient approach. Many of the reported conventional Friedlander methodologies have some problems such as difficult product isolation procedures, poor yields and use of expensive catalysts, etc. Recently, polymer or solid supported synthetic approaches have …
Optimization For Esterification Of Saturated Palm Fatty Acid Distillate By D-Optimal Design Response Surface Methodology For Biolubricant Production, Majd Jumaah, Nadia Salih, Jumat Salimon
Optimization For Esterification Of Saturated Palm Fatty Acid Distillate By D-Optimal Design Response Surface Methodology For Biolubricant Production, Majd Jumaah, Nadia Salih, Jumat Salimon
Turkish Journal of Chemistry
This work presents a synthesis of palm fatty acid distillate (PFAD)-based esters to produce biolubricant oils through the esterification reaction between saturated palm fatty acid distillate (SFA-PFAD) with different types of high degree polyhydric alcohols such as trimethylolpropane (TMP), di-trimethylolpropane (Di-TMP), pentaerythritol (PE), and di-pentaerythritol (Di-PE) in the presence of sulfuric acid as catalyst. The chemical structures of synthesized SFA PFAD-based esters were characterized and confirmed by using FTIR, NMR (1H and 13C) spectroscopies and GC-FID chromatography. The FTIR spectra of SFA PFAD-based ester products clearly showed the peaks of C=O and C-O of ester group at 1732-1740 cm-1 and …
Effect Of Fuel Choice On Conductivity And Morphological Properties Of Samarium Doped Ceria Electrolytes For It-Sofc, Burcu Aygün, Vedat Sariboğa, Mehmet Ali̇ Faruk Öksüzömer
Effect Of Fuel Choice On Conductivity And Morphological Properties Of Samarium Doped Ceria Electrolytes For It-Sofc, Burcu Aygün, Vedat Sariboğa, Mehmet Ali̇ Faruk Öksüzömer
Turkish Journal of Chemistry
The present investigation is emphasized on the effect of various combustion agents on the crystal properties, surface microstructure, and oxygen ion conductivity of 20% mole-Sm doped ceria (Ce0.80Sm0.20O1.90/SDC20) ceramics as solid electrolyte for ITSOFCs. The most widely used combustion agents for engineering ceramic production as ethylene glycol, diethylene glycol, triethylene glycol, L-alanine, L-valine, glycine, citric acid monohydrate, urea, and EDTA-citric acid were compared in terms of SDC20 properties. X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and electrochemical impedance spectroscopy (EIS) were used to determine the microstructure properties, crystal structure and ionic conductivity of SDC20 powder. XRD pattern …
New Iodine-Apatites: Synthesis And Crystal Structure, Evgeny Bulanov, Sergey Petrov, Alexander Knyazev
New Iodine-Apatites: Synthesis And Crystal Structure, Evgeny Bulanov, Sergey Petrov, Alexander Knyazev
Turkish Journal of Chemistry
The paper describes methods for the preparation of compounds with an apatite structure containing only iodine atoms in the "halogen" position. The crystal structure of the compounds was refined by the Rietveld method. The resulting apatites have a structure with a space group P63/m and have the following unit cell parameters: Ba4f 1.78(2) Ba6h 2.75(2)(PO4)3I0.04(2) (a = 10.18609(34) Å, c = 7.71113(30) Å, V = 692.889(54) Å3, R = 5.448%), Pb4f 1.82(2)Pb6h 2.75(2)(PO4)3I0.13(2) (a = 9.87882(18) Å, c = 7.43222(16) Å, V = 628.144(26) Å3, R = 8.533 %), Pb4f 1.90(2)Pb6h 2.68(2)(PO4)3I0.16(2) a = 9.87058(48) Å, c = 7.41255(46) Å, …
Sn(Ii)/Pn@Ac Catalysts: Synthesis, Physical-Chemical Characterization, And Applications, Yibo Wu, Fuxiang Li, Qingbin Li, Yongjun Han, Li Wang, Wei Ma, Fu Xv
Sn(Ii)/Pn@Ac Catalysts: Synthesis, Physical-Chemical Characterization, And Applications, Yibo Wu, Fuxiang Li, Qingbin Li, Yongjun Han, Li Wang, Wei Ma, Fu Xv
Turkish Journal of Chemistry
In this study, the novel tin-based catalysts (Sn(II)/PN@AC) were prepared using the phosphorus and nitrogen dual-modified activated carbon as support and SnCl2 as active compounds, as well as then evaluated in acetylene hydrochlorination. Under the reaction temperature of 180 °C and an acetylene gas hourly space velocity (GHSV-C2H2) of 30 h?1, the 15%Sn(II)/PN@AC-550 showed the initial acetylene conversion of 100% and vinyl chloride selectivity over 98.5%. Additionally, the deactivation rate of 15%Sn(II)/PN@AC-550 reached 0.47% h-1, which was lower than that of 15%Sn(II)/AC-550 (1.02% h-1), suggesting that PN@AC-550 as novel support can retarded the deactivation of Sn(II)/AC-550 catalysts during acetylene hydrochlorination. …
Gc-Ms Analyses And Bioactivities Of Essential Oil Obtained From The Roots Ofchrysopogon Zizanioides (L.) Roberty Cultivated In Giresun, Turkey, Derya Efe, Mustafa Karaköse, Ayça Aktaş Karaçeli̇k, Bengü Ertan, Mehmet Emi̇n Şeker
Gc-Ms Analyses And Bioactivities Of Essential Oil Obtained From The Roots Ofchrysopogon Zizanioides (L.) Roberty Cultivated In Giresun, Turkey, Derya Efe, Mustafa Karaköse, Ayça Aktaş Karaçeli̇k, Bengü Ertan, Mehmet Emi̇n Şeker
Turkish Journal of Chemistry
The essential oils (EOs) constituents have trade importance due to their bioactivities. In this research, the essential oil of the roots of Chrysopogon zizanioides (L.) Roberty cultivated in Giresun was obtained by hydrodistillation. Then, the chemical composition and biological activities of Chrysopogon zizanioides root essential oil (CEO) were studied. Thirty compounds were identified by gas chromatography-mass spectrometry (GC-MS) and the major compounds were determined as isobutyl-angelate (11.15%), α-muurolene (10.56%), α-cedrene (8.42%), α-patchoulene (8.10%), and ethylene brassylate (7.49%). The antimicrobial effect of CEO was investigated against pathogenic bacteria and fungus. Minimal inhibition concentration (MIC) was determined 31.25 μg/mL against C. albicans …
Investigation Of Pzt-5h And Pzt-8 Type Piezoelectric Effect On Cycling Stability On Si-Mwcnt Containing Anode Materials, Mehbare Doğrusöz, Muhammed Taha Demi̇rkan, Rezan Demi̇r Çakan
Investigation Of Pzt-5h And Pzt-8 Type Piezoelectric Effect On Cycling Stability On Si-Mwcnt Containing Anode Materials, Mehbare Doğrusöz, Muhammed Taha Demi̇rkan, Rezan Demi̇r Çakan
Turkish Journal of Chemistry
Silicon (Si) containing materials cannot be used in commercial lithium ion batteries due to the mechanical stress problem triggered by volume expansion during cycling. The high-volume change causes mechanical instability of Si anode materials during charging/discharging, resulting fast capacity fading. It is thought that piezoelectric materials can be a solution for the volume expansion problem because of their ability to generate electric field when pressure is applied on them. For this purpose, PZT-8 and PZT-5H type piezoelectric materials were mixed with silicon and multiwalled carbon nanotube (MWCNT) to obtain anode composites and tested electrochemically versus lithium metal. The piezoelectiric effect …
Characterization Of Extracts From Papaver Rhoeas And Potential Valorization Of Theseextracts In Dyeing Applications, Mohand Ouidir Boussoum, Rachida Ouldmokhtar, Abdelkader Ali Nehari, Beatrice George
Characterization Of Extracts From Papaver Rhoeas And Potential Valorization Of Theseextracts In Dyeing Applications, Mohand Ouidir Boussoum, Rachida Ouldmokhtar, Abdelkader Ali Nehari, Beatrice George
Turkish Journal of Chemistry
The aim of our work is to study the dyeing properties of extracts from natural sources such as Papaver rhoeas by modifying the conditions of the dyeing process, choosing other substrates that could be pretreated by innovative and environmentally friendly processes. The results obtained show a fairly high fixation of the extracts on the natural and artificial fibers. The use of mordants allowed the dye to be better fixed on the dyed fibers and to give several shades to the fabric. The rate of essential oil contained in Papaver rhoeas was considered important by the Clevenger process. Screening of extractive …
Effect Of Current Density On The Microstructure And Morphology Of The Electrodepositednickel Coatings, Amel Boukhouiete, Saliha Boumendjel, Nour-El-Houda Sobhi
Effect Of Current Density On The Microstructure And Morphology Of The Electrodepositednickel Coatings, Amel Boukhouiete, Saliha Boumendjel, Nour-El-Houda Sobhi
Turkish Journal of Chemistry
The aim of this research work was to study the effect of deposition current density on microstructure and surface morphology of electrodeposited nickel coatings. For this purpose, nickel deposits have been synthesized by direct current from Watts bath without additive, to limit the incorporation of pollutants resulting from surface adsorption or electro-activity of these compounds. Nickel deposits have been investigated by scanning electron microscopy and X-ray diffraction. Cyclic voltammetry was also used to gain information on the general behavior of the deposition. The optimum conditions of deposition were established and the influence of current density on the grain size, surface …
Dft (Density Functional Theory) Studies On Cycloisomerization Of 15-Memberedtriazatriacetylenic Macrocycle, Mansooreh Movahedi, Nader Zabarjad Hiraz, Ali Ezabadi, Marjaneh Samadizadeh, Mohamad Reza Talei Bavil Olyai
Dft (Density Functional Theory) Studies On Cycloisomerization Of 15-Memberedtriazatriacetylenic Macrocycle, Mansooreh Movahedi, Nader Zabarjad Hiraz, Ali Ezabadi, Marjaneh Samadizadeh, Mohamad Reza Talei Bavil Olyai
Turkish Journal of Chemistry
The mechanism as well the stereochemistry of cascade cycloisomerization of 15-membered triazatriacetylenic macrocycle was investigated theoretically by using M062X/6-31+G(d,p) and M062X/LANL2DZ calculations. The results showed that the mechanism and outcome of the reaction depended on the absence and presence of a transition metal catalyst. So that, in thermal-induced condition, the reaction had to experience several suprafacial concerted reactions including Ene-reaction (ΔG#=35.38 kcal/mol), Diels-Alder cycloaddition (ΔG# = 17.16 kcal/mol), and sigmatropic H-shift rearrangement (ΔG# = 56.21 kcal/mol) to produce diastereoselective fused cis-tetracyclic aromatic bearing a pyrrole moiety by following kinetic considerations. Also, the [2+2+2] cycloaddition mechanism was neglected in thermal?induced conditions …
Cytotoxic And Apoptotic Effects Of Hypericum Androsaemum On Prostate Adenocarcinoma(Pc-3) And Hepatocellular Carcinoma (Hep G2) Cell Lines With Identification Of Secondarymetabolites By Lc-Hrms, Nurdan Yazici Bektaş, Ezgi̇ Ersoy, Mehmet Boğa, Tuğçe Boran, Ercan Çinar, Gül Özhan, Ahmet Ceyhan Gören, Esra Eroğlu Özkan
Cytotoxic And Apoptotic Effects Of Hypericum Androsaemum On Prostate Adenocarcinoma(Pc-3) And Hepatocellular Carcinoma (Hep G2) Cell Lines With Identification Of Secondarymetabolites By Lc-Hrms, Nurdan Yazici Bektaş, Ezgi̇ Ersoy, Mehmet Boğa, Tuğçe Boran, Ercan Çinar, Gül Özhan, Ahmet Ceyhan Gören, Esra Eroğlu Özkan
Turkish Journal of Chemistry
The study aims to determine the secondary metabolites of Hypericum androsaemum L. extracts by liquid chromatographyhigh resolution mass spectrometry (LC-HRMS), and investigate the antioxidant and cytotoxic activities of the plant. Cytotoxic activity was evaluated by MTT assay, and apoptosis induction abilities on human prostate adenocarcinoma (PC-3), and hepatocellular carcinoma (Hep G2) cell lines. Accordingly, major secondary metabolites were found as hederagenin (762 ± 70.10 μg/g) in the leaves dichloromethane (LD), herniarin (167 ± 1.50 μg/g) in fruit dichloromethane (FD), (-)-epicatechin (6538 ± 235.36 μg/g) in the leaves methanol (LM), (-)-epigallocatechin gallate (758 ± 20.46 μg/g) in the fruit methanol (FM), …
Glucosamine Derived Hydrothermal Carbon Electrodes For Aqueous Electrolyte Energy Storage Systems, Burcu Ünal, Rezan Demi̇r Çakan
Glucosamine Derived Hydrothermal Carbon Electrodes For Aqueous Electrolyte Energy Storage Systems, Burcu Ünal, Rezan Demi̇r Çakan
Turkish Journal of Chemistry
Nitrogen-doped porous hard carbons are synthesized by hydrothermal carbonization method (HTC) using glucosamine as biosource and treated at different carbonization temperatures in nitrogen environment (500, 750, 1000 °C). The electrochemical performances of hard carbons electrode materials for aqueous electrolyte sodium ion batteries are examined to observe the effect of two different voltage ranges (-0.8-0.0) V and (0.0-0.8) V in 1.0 M Na2SO4 aqueous electrolyte. The best electrochemical performances are acquired for the 1000 °C treated glucosamine (GA-1000) porous carbon sample that provides ~96 F/g capacitance value in the negative voltage range (between -0.8 and 0.0) V. The sodium diffusion coefficient …
Study On Potential Applications And Toxicity Analysis Of Green Synthesized Nanoparticles, Rajni Garg, Priya Rani, Rishav Garg, Nnabuk Okon Eddy
Study On Potential Applications And Toxicity Analysis Of Green Synthesized Nanoparticles, Rajni Garg, Priya Rani, Rishav Garg, Nnabuk Okon Eddy
Turkish Journal of Chemistry
Nanomaterials have garnered the significant interest of scientists owing to their technological as well as medical applications. In particular, metal and metal oxide nanoparticles have gained prominence because of their enhanced performance as compared to their bulk counterparts. Metal-supported nanomaterials are anticipated to make major contributions to solving today's most challenging issues, like energy harvesting and environmental remediation. The incorporation of nanoparticles into sensors has significantly enhanced their precision and selectivity. With the advent of green chemistry, green synthetic techniques have been prioritized for the synthesis of single and multicomponent nanomaterials. In the current review, we have addressed the multidimensional …
Cyclodextrin-Active Natural Compounds In Food Applications: A Review Of Antibacterial, Bingren Tian, Yumei Liu
Cyclodextrin-Active Natural Compounds In Food Applications: A Review Of Antibacterial, Bingren Tian, Yumei Liu
Turkish Journal of Chemistry
Many natural compounds have excellent activity against different bacteria. However, their food use to inhibit the bacteria is often limited by poor water solubility, or instability to light, heat, oxygen, and other environmental factors. Cyclodextrin combines with these natural compounds could not only overcome these shortcomings, but also increase the antibacterial ability of active compounds. This review focuses on the following aspects of active natural compounds in cyclodextrin-based food: the preparation, food applications, and their possible antibacterial mechanisms of different systems. Both cyclodextrin and its derivatives are able to selectively combine with different guest molecules, such as terpenes, phenols and …
One-Pot Synthesis Of Graphene Hydrogel-Anchored Cobalt-Copper Nanoparticles And Their Catalysis In Hydrogen Generation From Ammonia Borane, Ibtihel Zaier, Önder Meti̇n
One-Pot Synthesis Of Graphene Hydrogel-Anchored Cobalt-Copper Nanoparticles And Their Catalysis In Hydrogen Generation From Ammonia Borane, Ibtihel Zaier, Önder Meti̇n
Turkish Journal of Chemistry
We reported a facile one-pot synthesis of bimetallic CoCu nanoparticles (NPs) anchored on graphene hydrogel (GH-CoCu) as catalysts in hydrogen generation from the hydrolysis of ammonia borane (HAB). The presented novel one-pot method composed of the reduction of the mixture of graphene oxide, cobalt(II), and copper(II) acetate tetrahydrates by aqueous ethylene glycol solution in a teflon-coated stainless-steel reactor at 180 °C. The structure of the yielded GH-CoCu nanocatalysts was characterized by TEM, SEM, XRD, XPS, and ICP-MS. This is the first example of both the synthesis of bimetallic CoCu NPs anchored on GH and the testing of a hydrothermally prepared …
Green Dehydrogenation Of Dimethylamine Borane Catalyzed By Cheaply Copper(0) Nanocatalysts Without Any Stabilizer At Nearly Room Temperature, Ali̇ Özdemi̇r, Si̇bel Duman
Green Dehydrogenation Of Dimethylamine Borane Catalyzed By Cheaply Copper(0) Nanocatalysts Without Any Stabilizer At Nearly Room Temperature, Ali̇ Özdemi̇r, Si̇bel Duman
Turkish Journal of Chemistry
In this work, the findings of the work on the green dehydrogenation behavior of molten dimethylamine borane (DMAB) catalyzed by the precatalyst copper(II) acetylacetonate (Cu(acac)2) in solvent-free medium (green) at near room temperature (nRT, 30.0+0.1°C) were reported. Herein, a complete study has been presented, which includes the following steps: (i) synthesis and catalytic activity of Cu(0) NCats in solvent-free medium, (ii) determination of activation energy for Cu(0) NCats catalyzed green dehydrogenation of DMAB, (iii) demonstration of catalytic lifetime of Cu(0) NCats, (iv) test of isolability and reusability of Cu(0) NCats, (v) poisoning experiments using carbon disulfide on a per-active-copper-atom basis, …
Antiinflammatory Photodynamic Therapy Potential Of Polyoxyethylene-Substituted Perylene Diimide, Nitrocatechol, And Azo Dye, Özgül Hakli, Kasim Ocakoğlu, Furkan Ayaz
Antiinflammatory Photodynamic Therapy Potential Of Polyoxyethylene-Substituted Perylene Diimide, Nitrocatechol, And Azo Dye, Özgül Hakli, Kasim Ocakoğlu, Furkan Ayaz
Turkish Journal of Chemistry
Photodynamic therapy (PDT) applications enable light-controlled activation of drug candidates instead of their constitutive activities to prevent undesired side effects associated with their constant activities. A specific wavelength of light is utilized to enable electron mobility in the chemical structure, which results in differential activities that may alter cell viability and cellular functions. Canonical photodynamic therapy applications mostly focus on cytotoxicity-based antimicrobial and anticancer properties of the PDT agents. In this study, we focused on subtoxic concentrations of three different molecules containing polyoxyethylene group and examined their antiinflammatory activities on stimulated mammalian macrophages. Stimulated macrophages produce proinflammatory cytokines TNF and …
Novel Surfactant Stabilized Plga Cisplatin Nanoparticles For Drug Delivery Applications, Samra Umar, Manzar Zahra, Muhammad Akhter, Amir Waseem
Novel Surfactant Stabilized Plga Cisplatin Nanoparticles For Drug Delivery Applications, Samra Umar, Manzar Zahra, Muhammad Akhter, Amir Waseem
Turkish Journal of Chemistry
In the current study, cisplatin loaded (Poly(lactic-co-glycolicacid)) (PLGA) stabilized with 4-phenylphenacylbromide based surfactants nanoparticles were developed for drug delivery applications. For the course of this study four new 4-phenylphenacylbromide based compounds abbreviated as PA(C2)3, PA(C8)3, PAC16 and PAC18 have been synthesized by the reaction of 4-phenylphenacylbromide with various long chain amines. The new surfactants were characterized with 1H and 13C NMR and FTIR spectroscopy. The critical micelle concentration (CMC) of newly synthesized surfactants are in the range of 0.024-0.091 mM. The newly synthesized surfactants have been incorporated in PLGA based nanoparticles and are used for drug encapsulation and delivery of …
Study Of The Effectiveness Of A Presoaking Process For Reducing The Additives Migration From Babies Toys, Mohand Ouidir Boussoum, Aicha Kentaoui, Beatrice George, Stephane Dumarcay, Ahmed Boucherit, Hassiba Laribi Habchi
Study Of The Effectiveness Of A Presoaking Process For Reducing The Additives Migration From Babies Toys, Mohand Ouidir Boussoum, Aicha Kentaoui, Beatrice George, Stephane Dumarcay, Ahmed Boucherit, Hassiba Laribi Habchi
Turkish Journal of Chemistry
This research aims to study a process of steeping in the n-heptane, used for reducing the migration of additives contained initially in toys for babies plasticized with di-octylphtalate (DOP) based on poly (vinyl chloride) (PVC) and stabilized with epoxidized sunflower oil (ESO). Two formulations were carried out at different levels of DOP plasticizers (15% and 45%). The migration tests were conducted in the synthetic saliva in the absence and in the presence of α-amylase with or without agitation at 37° C for 1, 3, and 6 h. The migration phenomenon was studied on the basis of preliminary studies based on …
Microwave Irradiated Synthesis Of Schiff Bases Of 4-(Arylideneamino)-5-Alkyl-2,4-Dihydro-1,2,4-Triazole-3-Thione Containing 1,2,4-Triazole Segment, Mahdi Shirmohammadi, Saeid Souzangarzadeh, Dadkhoda Ghazanfari, Mohsen Ghodratbeigi, Mohammad Reza Akhgar
Microwave Irradiated Synthesis Of Schiff Bases Of 4-(Arylideneamino)-5-Alkyl-2,4-Dihydro-1,2,4-Triazole-3-Thione Containing 1,2,4-Triazole Segment, Mahdi Shirmohammadi, Saeid Souzangarzadeh, Dadkhoda Ghazanfari, Mohsen Ghodratbeigi, Mohammad Reza Akhgar
Turkish Journal of Chemistry
Novel compounds based on the 1,2,4-triazole skeleton were synthesized. A class of 4-amino-5-alkyl-4H-1,2,4-triazole-3- thione created by reaction of thiocarbohydrazide with long-chain aliphatic carboxylic acids, and then the Schiff bases were obtained in the media of heat and microwave waves, in the presence and the absence of a catalyst. Their chemical structures were assayed by elemental analysis, also device spectroscopic methods.
The Removal Of Chromium (Vi) From Tannery Waste Using Spirulina Sp. Immobilized Silica Gel, Nais Pinta Adetya, Uma Fadzilia Arifin, Emiliana Anggriyani
The Removal Of Chromium (Vi) From Tannery Waste Using Spirulina Sp. Immobilized Silica Gel, Nais Pinta Adetya, Uma Fadzilia Arifin, Emiliana Anggriyani
Turkish Journal of Chemistry
The use of microalgae biomass is an alternative solution to the problem of environmental pollution due to heavy metals, one of which is Cr metal in leather tanning liquid waste. However, the ability of biomass to adsorb heavy metals has limitations. Therefore, the algal biomass is immobilized with silica gel in order to obtain a stable structure. This research aims to study the absorption efficiency of Cr (VI) metal by the biomass of Spirulina sp. which is immobilized with silica gel from the tannery liquid waste. The preparation stages in this study were adsorbent preparation, immobilization of biomass with silica …
Synthesis, Characterization, Cox1/2 Inhibition And Molecular Modeling Studies On Novel 2-Thio-Diarylimidazoles, Zafer Şahi̇n, Meli̇ke Kalkan, Barkin Berk, Leyla Yurttaş, Ceysu Bender, Sevde Nur Bi̇lteki̇n Kaleli̇, Şeref Demi̇rayak
Synthesis, Characterization, Cox1/2 Inhibition And Molecular Modeling Studies On Novel 2-Thio-Diarylimidazoles, Zafer Şahi̇n, Meli̇ke Kalkan, Barkin Berk, Leyla Yurttaş, Ceysu Bender, Sevde Nur Bi̇lteki̇n Kaleli̇, Şeref Demi̇rayak
Turkish Journal of Chemistry
Heterocyclic compounds with diaryl substituents have been a milestone approach for selective cyclooxygenase 2 (COX 2) inhibition by bioisosteric replacements and modifications. It is also known that thiazole derivatives have different pharmacological activities. In this study, nine novel 2-[(1,5-diphenyl-1H-imidazole-2-yl)thio]-N-(thiazole-2-yl)acetamide derivatives (Compound 1-9) were synthesized via the reaction of 1,5-disubstitued phenyl-imidazole-2-thiole and N-thiazole acetamide. The inhibitory effects of COX-1 and COX-2 enzymes were tested for the synthesized compounds. Enzyme-ligand interactions of the most active compound on COX subtypes were elucidated by molecular modeling studies. The percent inhibitory effect for compound 1, which is the naked derivative among all the compounds, was …
Investigation Of Electrochemical Behavior Of Potassium Ferricyanide/Ferrocyanide Redox Probes On Screen Printed Carbon Electrode Through Cyclic Voltammetry And Electrochemical Impedance Spectroscopy, Yücel Koç, Uğur Morali, Sali̇m Erol, Hüseyi̇n Avci
Investigation Of Electrochemical Behavior Of Potassium Ferricyanide/Ferrocyanide Redox Probes On Screen Printed Carbon Electrode Through Cyclic Voltammetry And Electrochemical Impedance Spectroscopy, Yücel Koç, Uğur Morali, Sali̇m Erol, Hüseyi̇n Avci
Turkish Journal of Chemistry
Potassium ferricyanide, potassium ferrocyanide, and their combination system are widely used redox probes for electrochemical impedance spectroscopy (EIS) characterization. In this work, electrochemical behavior of K3Fe(CN)6, K4Fe(CN) 6, and K3Fe(CN)6/K4Fe(CN)6 redox probes at five different concentrations using a screen printed carbon electrode (SPCE) by cyclic voltammetry (CV) and EIS methods was analyzed. Redox potentials were observed as a result of anodic and cathodic peak with CV analysis with determination 10 mM appropriate concentration through 0.01 mM, 0.1 mM, 1 mM, and 100 mM. In addition, with EIS analysis, each redox probe was simulated according to two different Randles circuit models …
A Facile Approach For The Synthesis Of Porous Hematite And Magnetite Nanoparticles Through Sol-Gel Self-Combustion, Imene Gritli, Afrah Bardaoui, Jamila Ben Naceur, Salah Ammar, Mohammad Abu Haija, Sherif Mohamed Abdel Salam Keshk, Radhouane Chtourou
A Facile Approach For The Synthesis Of Porous Hematite And Magnetite Nanoparticles Through Sol-Gel Self-Combustion, Imene Gritli, Afrah Bardaoui, Jamila Ben Naceur, Salah Ammar, Mohammad Abu Haija, Sherif Mohamed Abdel Salam Keshk, Radhouane Chtourou
Turkish Journal of Chemistry
Porous magnetite (Fe3O4) and hematite (α-Fe2O3) nanoparticles were prepared via the sol-gel auto-combustion method. The gels were prepared by reacting ferric nitrates (as oxidants) with starch (as fuel) at an elevated temperature of 200 °C. Different ratios (Φ) of ferric nitrates to starch were used for the synthesis (Φ = fuel/oxidant). The synthesized iron oxides were characterized by Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmet-Teller (BET) and vibrating sample magnetometer (VSM) analysis techniques. The crystal structure, morphology, and specific surface area of the iron oxide nanoparticles (Fe3O4 …
Crystal Structure And Vibrational Spectra Of Bis(2-Isobutyrylamidophenyl)Amine:A Redox Noninnocent Ligand, Emrah Aslantatar, Savita K. Sharma, Omar Villanueva, Cora E. Macbeth, İlkay Gümüş, Hakan Arslan
Crystal Structure And Vibrational Spectra Of Bis(2-Isobutyrylamidophenyl)Amine:A Redox Noninnocent Ligand, Emrah Aslantatar, Savita K. Sharma, Omar Villanueva, Cora E. Macbeth, İlkay Gümüş, Hakan Arslan
Turkish Journal of Chemistry
The molecular structure of bis(2-isobutyrylamidophenyl)amine (H3LNNN) has been determined from single-crystal X-ray diffraction data. The crystal packing of H3LNNN is governed by the N-H...O and C-H...O hydrogen-bonding and C-H...π stacking interactions between the vicinal molecules. The intermolecular interactions in the crystal structure of H3LNNN have been also examined via Hirshfeld surface analysis and fingerprint plots. The Hirshfeld surface analysis showed that the important role of N-H...O and C-H...π interactions in the solid-state structure of H3LNNN. The molecular structure, vibrational frequencies, and infrared intensities of H3LNNN were computed by ab initio HF and DFT (B3LYP, B3PW91, and BLYP) methods using the …
Synthesis And Application Of Colloidal Cds Quantum Dots As Interface Modification Material In Perovskite Solar Cells, Esma Yenel
Turkish Journal of Chemistry
In this study, colloidal CdS quantum dots were synthesized, structurally characterized, and their effect on performance of perovskite solar cells was observed by using them as interface modification agent between TiO2/perovskite. Colloidal CdS quantum dots were synthesized based on two-phase method and characterized by X-ray diffraction and Transmission Electron Microscopy techniques. The average particle size of CdS quantum dots have found to be around 5 nm. Oleic acid was used as capping agent during synthesis to lead solubility in organic solvents. Obtained quantum dots are coated on compact TiO2 layer for surface modification. A decrease was observed when oleic acid …
Silk Fiber-Based Composite Nanofiber Tissue Scaffold Produced With Electrospinning Method, Meti̇n Yüksek, Mehmet Akalin, Erhan Sancak, Erkan İşgören, Onur Atak, Derya Saltik Çi̇rki̇n, Ali̇ Beyi̇t
Silk Fiber-Based Composite Nanofiber Tissue Scaffold Produced With Electrospinning Method, Meti̇n Yüksek, Mehmet Akalin, Erhan Sancak, Erkan İşgören, Onur Atak, Derya Saltik Çi̇rki̇n, Ali̇ Beyi̇t
Turkish Journal of Chemistry
Wound dressings are one of the most rapidly expanding areas in medical textiles. In recent years, a large number of functional wound dressing has been developed. The aims of these products are to speed up the wound healing process and to provide maximum comfort for patients. Today, the multidisciplinary studies are required to improve further existed wound dressings. The results of such research studies are also promised new hopes for the Turkish textile industry weakened by the global competition. For this purpose, three different polymers were selected as silk fibroin (SF) / polycaprolactone (PCL) / polyethylene oxide (PEO). The productions …
Tunable Aryl Alkyl Pyrazolium Tetrafluoroborate Ionic Liquids/Salts: Synthesis,Characterization, And Applications For Removal Of Methyl Orange From Aqueous Solution, Melek Canbulat Özdemi̇r
Tunable Aryl Alkyl Pyrazolium Tetrafluoroborate Ionic Liquids/Salts: Synthesis,Characterization, And Applications For Removal Of Methyl Orange From Aqueous Solution, Melek Canbulat Özdemi̇r
Turkish Journal of Chemistry
In this work, new tunable aryl alkyl pyrazolium tetrafluoroborate ionic liquids/salts, 2-ethyl-1-(p-X-phenyl)-3,5- dimethylpyrazolium tetrafluoroborate [X: -Br (4a), -OCH3 (4b), -NO2 (4c)] and 2-butyl-1-(p-X-phenyl)-3,5-dimethylpyrazolium tetrafluoroborate [X: -Br (5a), -OCH3 (5b), -NO2 (5c)], were synthesized by following halide-free synthetic route. Their chemical structures were identified through NMR (1H, 13C, 19F), IR, elemental analysis, and HRMS data. The synthesized 4a-4c and 5a-5c salts were used for the removal studies of methyl orange dye from aqueous solutions. The effects of specific parameters such as nature of the solvent, pH, contact time, amount and structure of the salts, and concentration of potassium chloride on the …