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Full-Text Articles in Physical Sciences and Mathematics
Ultrasound Assisted Supramolecular Liquid Phase Microextraction Procedure For Sudan Iat Trace Level In Environmental Samples, Mustafa Soylak, Özgür Özalp, Furkan Uzcan
Ultrasound Assisted Supramolecular Liquid Phase Microextraction Procedure For Sudan Iat Trace Level In Environmental Samples, Mustafa Soylak, Özgür Özalp, Furkan Uzcan
Turkish Journal of Chemistry
A method based on supramolecular liquid phase microextraction has been developed for the preconcentration and determination of trace levels of Sudan I. 1-decanol and tetrahydrofuran were used as supramolecular solvent components. Trace levels of Sudan I were extracted into the extraction solvent phase at pH = 4.0 Analytical parameters such as pH value, supramolecular solvent volume, ultrasonication, centrifugation, model solution volume, matrix effects have been optimized. The limit of detection and the limit of quantification values for Sudan I were calculated as 1.74 μg L-1 and 5.75 μg L-1, respectively. In order to determine the accuracy of the method, addition …
Low Loaded Pt-Co Catalyst Surfaces Optimized By Magnetron Sputtering Sequentialdeposition Technique For Pem Fuel Cell Applications: Physical And Electrochemicalanalysis On Carbon Paper Support, Osman Öztürk, Aydin Haşi̇moğlu, Oğuz Kaan Özdemi̇r, İnci̇ Karaaslan, Ali̇ Şems Ahsen
Low Loaded Pt-Co Catalyst Surfaces Optimized By Magnetron Sputtering Sequentialdeposition Technique For Pem Fuel Cell Applications: Physical And Electrochemicalanalysis On Carbon Paper Support, Osman Öztürk, Aydin Haşi̇moğlu, Oğuz Kaan Özdemi̇r, İnci̇ Karaaslan, Ali̇ Şems Ahsen
Turkish Journal of Chemistry
A series of thin Pt-Co films with different metal ratios were deposited by using the sequential cosputtering directly on a commercial hydrophobic carbon paper substrate at room temperature and in ultra-high vacuum (UHV) conditions. Their electrocatalytic properties toward the oxygen reduction reaction were investigated in 0.5 M H2SO4 solution by means of cyclic voltammetry (CV) and linear sweep voltammetry (LSV) on rotating disc electrode (RDE). The results showed that Pt particles, deposited by dc-magnetron gun, surround the large Co-clusters deposited by rf-magnetron gun. In addition, the increase of Co content led to an increase in the electrochemical active surface area …
N Doping Of Tio2 Nanocrystal For Efficient Photodegradation Of Organic Pollutants Underultraviolet And Visible Light Irradiation, Xiaoyou Yu, Qianrui Lv
N Doping Of Tio2 Nanocrystal For Efficient Photodegradation Of Organic Pollutants Underultraviolet And Visible Light Irradiation, Xiaoyou Yu, Qianrui Lv
Turkish Journal of Chemistry
To decrease the band gap of TiO2 and enhance its photocatalytic performance, in this work, N-doped nanocrystalline TiO2 is synthesized successfully through a simple sol-gel synthesis process with dicyandiamide used as N source. The N-doped TiO2 photocatalysts have been characterized in detail by means of powder X-ray diffraction, Raman spectroscopy, infrared spectroscopy, UV-vis spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscope. The photocatalytic activities of N-doped TiO2 to different organic pollutants are significantly different. Using 2 × 10-5 mol/L methylene blue as the target pollutant, N-doped TiO2 can produced approximately 100% conversion within 40 min, the photocatalytic degradation ability of …
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 …
One-Pot Green Synthesized Protein-Based Silver Nanocluster As Prooxidant Biosensor, Esi̇n Akyüz
One-Pot Green Synthesized Protein-Based Silver Nanocluster As Prooxidant Biosensor, Esi̇n Akyüz
Turkish Journal of Chemistry
In this study, silver nanoclusters as prooxidant biosensor were eco-friendly synthesized using chicken egg white protein without any chemical reducing agents for measuring copper(II)-induced prooxidant activities of catechin, epicatechin, epigallocatechin gallate, resveratrol, gallic acid, chlorogenic acid, and rutin. The prooxidant activities were evaluated via measuring the absorption at 450 nm wavelength of the Cu(I)-neocuproine chelate formed by extraction of protein-bound Cu(I) with neocuproine reagent. Accuracy was determined by evaluating recovery values of wine, grape and apple samples and the obtained values were between 97.2%-98.9%. Intraday precision and inter-day reproducibility experiments were studied with three different experiments in a day and …
Polycyclic Aromatic Hydrocarbon-Substituted Push-Pull Chromophores: An Investigationof Optoelectronic And Nonlinear Optical Properties Using Experimental And Theoreticalapproaches, Çağatay Dengi̇z
Turkish Journal of Chemistry
A series of new push-pull chromophores were synthesized in moderate to very high yields (65%?97%) by treating TCNE and TCNQ with alkynes substituted by electron-rich diethylaniline and polycyclic aromatic hydrocarbons. Some of the chromophores exhibit strong intramolecular charge-transfer bands in the near-IR region with λmax values between 695 and 749 nm. With the help of experimental and theoretical analysis, it is concluded that the trend in λmax values is affected by PAH substituents sterically, not electronically. Steric constraints led to the increased dihedral angles, reducing conjugation efficiencies. The absorption properties of push-pull compounds have been investigated in solvents possessing different …
Photocatalytic Decomposition Of Textile Dyestuffs By Photosensitive Metal Oxide Catalysts, Esra Yeli̇z Altun, Zehra Tuba Şi̇şmanoğlu, Güli̇n Selda Pozan Soylu
Photocatalytic Decomposition Of Textile Dyestuffs By Photosensitive Metal Oxide Catalysts, Esra Yeli̇z Altun, Zehra Tuba Şi̇şmanoğlu, Güli̇n Selda Pozan Soylu
Turkish Journal of Chemistry
Textile azo dyes are one of the pollutants in waste water that adversely affect human and environmental health. Removal of these chemicals from wastewater is important for eco-system and human health. In this study, Bi2O3 nanoflakes and ZnO were synthesized by the co-precipitation method. Adsorption and photocatalytic degradation reactions were carried out to remove dyes (Victoria blue (VB) and Malachite green (MG)) from wastewater with the photocatalysts. In order to improve the activity of catalysts, cetyltrimethylammoniumbromide (CTAB) was added as a surfactant to pure oxide structures, and Bi2O3-CTAB and ZnO-CTAB catalysts were prepared. The structural and morphological properties of these …
Antiinfective Properties Of Ursolic Acid-Loaded Chitosan Nanoparticles Againststaphylococcus Aureus, Fatemeh Ghasemzadeh, Ghasem Najafpour, Maedeh Mohammadi
Antiinfective Properties Of Ursolic Acid-Loaded Chitosan Nanoparticles Againststaphylococcus Aureus, Fatemeh Ghasemzadeh, Ghasem Najafpour, Maedeh Mohammadi
Turkish Journal of Chemistry
The present study aimed to synthesize ursolic acid-loaded chitosan nanoparticles (UA-Ch-NPs) as an antiinfective agent against 21 Staphylococcus aureus isolates. The UA-Ch-NPs were synthesized by a simple method and then characterized by TEM, FTIR, DLS-zeta potential, and XRD analyses. According to the characterization results, highly dispersed spherical nanoparticles with a mean diameter of 258 nm and a zeta potential of + 40.1 mV were developed. The antibacterial properties of UA-Ch-NPs were investigated and their inhibitory effect on biofilm formation was demonstrated by AFM. Finally, the expression levels of icaA and icaD were measured using real-time PCR. Results indicated that the …
Acetylene Hydrochlorination Over Tin Nitrogen Based Catalysts: Effect Of Nitrogen Carbondotsas Nitrogen Precursor, Yibo Wu, Fuxiang Li, Qingbin Li, Songtian Li, Ganqing Zhao, Xuerong Sun, Peisong Liu, Guoxv He, Yongjun Han, Liping Cheng, Shiying Luo
Acetylene Hydrochlorination Over Tin Nitrogen Based Catalysts: Effect Of Nitrogen Carbondotsas Nitrogen Precursor, Yibo Wu, Fuxiang Li, Qingbin Li, Songtian Li, Ganqing Zhao, Xuerong Sun, Peisong Liu, Guoxv He, Yongjun Han, Liping Cheng, Shiying Luo
Turkish Journal of Chemistry
The catalysts comprising the main active compounds of Sn-Nx were synthesized using trichlorophenylstannane ((C6H5)Cl3Sn), nitrogen carbon-dots (NCDs), and activated carbon (AC) as starting materials, and the activity and stability of catalysts was evaluated in the acetylene hydrochlorination. According to the results on the physical and chemical properties of catalysts (TEM, XRD, BET, XPS and TG), it is concluded that NCDs@AC can increase (C6H5)Cl3Sn dispersity, retard the coke deposition of (C6H5)Cl3Sn/AC and lessen the loss of (C4H5)Cl3Sn, thereby further promoting the stability of (C6H5)Cl3Sn/AC. Based on the characterization results of C2H2- TPD and HCl adsorption experiments, we proposed that the existence …
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. …
Surface And Chemical Characteristics Of Platinum Modified Activated Carbon Electrodesand Their Electrochemical Performance, Tuğrul Yumak, Serap Yumak, Abdulkeri̇m Karabulut
Surface And Chemical Characteristics Of Platinum Modified Activated Carbon Electrodesand Their Electrochemical Performance, Tuğrul Yumak, Serap Yumak, Abdulkeri̇m Karabulut
Turkish Journal of Chemistry
Platinum (Pt) loaded activated carbons (ACs) were synthesized by the thermal decomposition of platinum (II) acetylacetonate (Pt(acac)2) over chemically activated glucose-based biochar. The effect of Pt loading on surface area, pore characteristics, surface chemistry, chemical structure, and surface morphology were determined by various techniques. XPS studies proved the presence of metallic Pt0 on the AC surface. The graphitization degree of Pt loaded ACs were increased with the loaded Pt0 amount. The electrochemical performance of the Pt-loaded ACs (Pt@AC) was determined not only by the conventional three-electrode system but also by packaged supercapacitors in CR2032 casings. The capacitive performance of Pt@AC …
A Survey On Surface Morphology Control Of Cross-Linked Poly(N-Vinylpyrrolidone)Polymer Particle Via Inverse Suspension Polymerization, Uğur Soykan, Sedat Çeti̇n
A Survey On Surface Morphology Control Of Cross-Linked Poly(N-Vinylpyrrolidone)Polymer Particle Via Inverse Suspension Polymerization, Uğur Soykan, Sedat Çeti̇n
Turkish Journal of Chemistry
This study mainly centers on the preparation and characterization of the cross-linked poly(NVP) microspheres by means of inverse suspension polymerization technique. The effect of the cross-linker content, the volumetric ratio of dispersed phase to suspension phase (DP/CP), agitation rate, and the reaction temperature on the characteristics of the microparticles were investigated meticulously using SEM, and the optimum preparation conditions were determined. The findings revealed that the morphological and surface properties of the obtained particles could be controlled easily by changing these parameters. Accordingly, the microparticles having the perfect spherical with smooth surface and good roundness, dumbbell-shaped, snowman besides dented, sunked …
Preparation Of G-Cuo Nps And G-Zno Nps With Mallow Leaves, Investigation Of Theirantibacterial Behavior And Synthesis Of Bis(Indolyl)Methane Compounds Under Solventfreemicrowave Assisted Dry Milling Conditions Using G-Cuo Nps As A Catalyst, Mi̇ne Sulak
Turkish Journal of Chemistry
In this study, biogenic copper and zinc oxide nanoparticles (G-ZnONPs and G-CuONPs) were synthesized by the green synthesis method using Malva parviflora L. (Millow) leaf extract and the obtained nanoparticles were characterized in detail with UVVis, FTIR, SEM, XRD. The antibacterial properties of the synthesized nanoparticles on gram-positive and gram-negative bacteria were investigated and it was found that the nanoparticles had high antimicrobial activity in the results of the experiments. With the obtained G-CuONPs, the synthesis of bis(indolyl)methanes with the "green" one-pot synthesis using microwave was achieved quickly and with high efficiency, and the thermal behavior of the obtained products …
Application Of Inverse Gas Chromatography In The Surface Characterization Of Diethanolamine Modified Polystyrene Based Polymer, Ayşegül Çi̇ğdem Adigüzel, Burak Korkmaz, Fati̇h Çakar, Bahi̇re Fi̇li̇z Şenkal, Özlem Cankurtaran
Application Of Inverse Gas Chromatography In The Surface Characterization Of Diethanolamine Modified Polystyrene Based Polymer, Ayşegül Çi̇ğdem Adigüzel, Burak Korkmaz, Fati̇h Çakar, Bahi̇re Fi̇li̇z Şenkal, Özlem Cankurtaran
Turkish Journal of Chemistry
In the present work, diethanol amine modified polystyrene based polymer (PVBC-Diethanol amine) was synthesized and characterized, then surface properties of the polymer were examined by inverse gas chromatography method at infinite dilution. The retention diagrams obtained based on the interaction of polar and nonpolar probes with the polymer were drawn over a temperature range from 30 to 55 °C. Through the diagrams, the dispersive component of the surface free energy, γSD of the polymer surface, and the specific enthalpy of adsorption, ΔHAS , of probes on the polymer were also calculated. Lewis acid, KA, and Lewis base, KD, parameters of …
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 …
Chemical Composition And Biological Activities Of Essential Oils Of Two New Chemotypes Of Glebionis Cass., Hüseyi̇n Servi̇
Chemical Composition And Biological Activities Of Essential Oils Of Two New Chemotypes Of Glebionis Cass., Hüseyi̇n Servi̇
Turkish Journal of Chemistry
This paper includes the result of the first study of the chemical composition, antioxidant, antiinflammatory, and antidiabetic activities of the essential oils of Glebionis coronaria (L.) Cass. ex Spach and Glebionis segetum (L.) Fourr. from Turkey. In the current study, nine and twenty-eight constituents were determined in the essential oils of aerial parts of G. coronaria (GCE) (92.1%) and G. segetum (GSE) (90.0%), respectively. The main components were capillin (65.9%) in GCE, capillene (53.4%) in GSE. The essential oil compositions were evaluated and compared with previous researches. In the current study, the plants are classified as chemotypes of Glebionis species. …
Pyridine Substituted Bodipys: Synthesis, Characterization And Cholinesterease,α-Glucosidase Inhibitory, Dna Hydrolytic Cleavage Effects, Burak Barut, Hüseyi̇n Baş, Zekeri̇ya Biyiklioğlu
Pyridine Substituted Bodipys: Synthesis, Characterization And Cholinesterease,α-Glucosidase Inhibitory, Dna Hydrolytic Cleavage Effects, Burak Barut, Hüseyi̇n Baş, Zekeri̇ya Biyiklioğlu
Turkish Journal of Chemistry
In this study, the synthesis of new monostyryl (BDPY-2) and distyryl BODIPY dyes (BDPY-4, BDPY-5) containing pyridine groups has been reported for the first time. The acetylcholinesterase from Electrophorus electricus (AChE), butyrylcholinesterase from equine serum (BuChE), α-glucosidase from Saccharomyces cerevisiae and DNA hydrolytic cleavage actions of BDPY-2, BDPY-4, BDPY- 5 were investigated using various techniques. The results indicated that the compounds had varying inhibition properties against AChE, BuChE, and α-glucosidase. BDPY-4 was the most potent compound on AChE with IC50 of 54.78 ± 4.51 μM, and Lineweaver-Burk plots indicated that the compound is bound to a site other than the …
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 …
Enhancement Of Dispersion Stability Of Inorganic Additives Via Poly(Sodium-4-Styrenesulfonate) Treatment Geared To Hydrogel Applications, Fi̇li̇z Boran, Merve Okutan
Enhancement Of Dispersion Stability Of Inorganic Additives Via Poly(Sodium-4-Styrenesulfonate) Treatment Geared To Hydrogel Applications, Fi̇li̇z Boran, Merve Okutan
Turkish Journal of Chemistry
This study reports the preparation of poly(sodium-4-styrene sulfonate) (PSS) treated bentonite and clinoptilolite to prevent the agglomeration and sedimentation of these inorganic fillers during the preparation of hydrogel. For this purpose PSS treated fillers were prepared by using various techniques (dip and dry, hydrothermal, one-step ball milling and ultrasonication methods). The most suitable technique for preparing these PSS treated inorganic fillers (abbreviated as BP-dip and CP-dip) was the dip and dry method. BP-dip and CP-dip based polyvinyl alcohol/polyvinylpyrrolidone (PVA/PVP) composite hydrogels were prepared using the freeze/ thawing method after the addition of one of BP-dip and CP-dip inorganic fillers in …
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), …
Synthesis Of Imidazo-1,4-Oxazinone Derivatives And Investigation Of Reaction Mechanism, Volkan Taşdemi̇r
Synthesis Of Imidazo-1,4-Oxazinone Derivatives And Investigation Of Reaction Mechanism, Volkan Taşdemi̇r
Turkish Journal of Chemistry
In this study, nine different C-2 aroyl imidazole derivatives were synthesized in a one pot reaction with two steps, and the reduction reactions of these derivatives with NaBH4 were carried out under mild conditions. Substitution reaction of obtained imidazo methanol derivatives with chloroacetylchloride reagent and ring reaction of substitution products were investigated. It was determined that 1,4-imidazoxazinone derivative was obtained as a result of the cyclization reaction. The intermediate products obtained during the cyclization reaction were isolated, and the path of the reaction under different conditions was discussed.
Supramolecular Solvents: A Review Of A Modern Innovation In Liquid-Phase Microextraction Technique, Muhammad Saqaf Jagirani, Mustafa Soylak
Supramolecular Solvents: A Review Of A Modern Innovation In Liquid-Phase Microextraction Technique, Muhammad Saqaf Jagirani, Mustafa Soylak
Turkish Journal of Chemistry
Supramolecular solvents (SUPRASs) have rapidly gained more attention as a potential substitute to organic solvents in the sample preparation and preconcentration process. The essential properties of SUPRAS solvents (e.g., multiple binding sites, different polarity microenvironments, the opportunity to tailor their properties, etc.) these qualities offer numerous opportunities to advance innovative sample preparation and pretreatment platforms compared to the traditional solvents. Among these qualities, certain importance is placed on theoretical and practical knowledge. That has assisted in making significant developments in SUPRAS that advance our understanding of the processes behind SUPRA'S formation. The SUPRA-solute interactions that drive extractions are explored in …
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, …
Structural, Surface Morphological, Optical And Electrical Properties Of Inxsey Thin Films, An Absorber Layer For Photovoltaic Cells Fabricated By M-Cbd Method Using Different Variables, Fati̇h Ünal, Serkan Demi̇r, Hasan Mammadov
Structural, Surface Morphological, Optical And Electrical Properties Of Inxsey Thin Films, An Absorber Layer For Photovoltaic Cells Fabricated By M-Cbd Method Using Different Variables, Fati̇h Ünal, Serkan Demi̇r, Hasan Mammadov
Turkish Journal of Chemistry
Mixed-phased InxSey thin film containing InSe, In2Se3 and In6Se7 phases was prepared by M-CBD method and characterized by X-ray diffraction, AFM, optical spectroscopy and J-V measurements. Structural, optical and electrical conductance properties were modified by annealing the films at different temperatures. Optical and morphological properties were also investigated dependently on temperature and concentration of cationic precursor solution. It has been observed with annealing that, the compositions of the phases changed, particle sizes increased, energy band gaps decreased and electrical conductivity increased. The photoconductivity of thin film was revealed by J-V measurements and slightly increased by annealing. From temperature-dependent J-V measurements, …
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 …
Determination Of Characterization, Antibacterial And Drug Release Properties Of Poss-Based Film Synthesized With Sol-Gel Technique, İdi̇l Karaca Açari, Süleyman Köytepe, Burhan Ateş, İsmet Yilmaz, Turgay Seçki̇n
Determination Of Characterization, Antibacterial And Drug Release Properties Of Poss-Based Film Synthesized With Sol-Gel Technique, İdi̇l Karaca Açari, Süleyman Köytepe, Burhan Ateş, İsmet Yilmaz, Turgay Seçki̇n
Turkish Journal of Chemistry
In the study, antibacterial film synthesis was aimed using sol-gel technique from POSS structure with various functional groups. For this purpose, antibacterial properties have been acquired by metronidazole to the films to be synthesized. The films obtained were coated on glass surface samples by dip coating method. Antibacterial activities of surface coated glass samples were observed in E.coli and S. aureus bacteria. Metronidazole release studies in the film samples were followed by UV spectrophotometer. It was observed that drug release reached 68.90% at the end of the 24th h. As a result, it is thought that the synthesized film will …