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Articles 1 - 30 of 118
Full-Text Articles in Physical Sciences and Mathematics
Synthesis Of Silane- And Quaternary Ammonium-Bearing Copolymers And Application As A Coating Resin On Cotton Fabric, Ayşe Marti̇n, Nazgül Güler, İlknur Yerli̇, Hande Hançer, Tüli̇n Özbek, Tarik Eren
Synthesis Of Silane- And Quaternary Ammonium-Bearing Copolymers And Application As A Coating Resin On Cotton Fabric, Ayşe Marti̇n, Nazgül Güler, İlknur Yerli̇, Hande Hançer, Tüli̇n Özbek, Tarik Eren
Turkish Journal of Chemistry
In this study, silane and quaternary ammonium functional methacrylate monomers were synthesized and used to construct a copolymer using an emulsion polymerization technique to control the reaction rate. The copolymer was then designed using different ratios of silane and quaternary ammonium groups to investigate the relationship between the structure and properties. The presence of the ethoxy silane group in the copolymer series provided covalent bonding through the silanol group onto cotton fabric. The presence of cationic groups also helped to cover the fabric surface. After coating the cotton textile fabric, the resistance of the dye on the fabric surface to …
Polypyrrole Fabricated Laponite Rd Conductive Nanocomposites: Influence Of Grafting Efficiency On Structural And Conductive Properties, Shafiq Ur Rehman, Shaista Taimur, Asif Raza, Tariq Yasin
Polypyrrole Fabricated Laponite Rd Conductive Nanocomposites: Influence Of Grafting Efficiency On Structural And Conductive Properties, Shafiq Ur Rehman, Shaista Taimur, Asif Raza, Tariq Yasin
Turkish Journal of Chemistry
In the present work novel conductive organic-inorganic nanocomposites were produced by grafting of pyrrole monomer onto silanized Laponite RD utilizing emulsion graft polymerization. Influence of some important factors like concentration of monomer, initiator and surfactant were investigated on grafting efficiency. Grafting of polypyrrole chains onto modified Laponite RD was verified by Fourier transform infrared spectroscopy (FT-IR). Scanning electron microscope (SEM) revealed the spherical particles of nanocomposite with average diameter of 271.5 nm. XRD pattern showed that molecular framework of pure polypyrrole almost remains same in nanocomposite. Surface area and pore volume of Laponite RD, measured by Brunauer-Emmett-Teller (BET) analysis, was …
Sustainable Graphitic Carbon From Biomass To Be Suitable For Technological Devices, Gökçen Akgül
Sustainable Graphitic Carbon From Biomass To Be Suitable For Technological Devices, Gökçen Akgül
Turkish Journal of Chemistry
Technological devices are mostly manufactured by conductive and semiconductive materials. As advancement in the last decades, carbon nanomaterials have been explored in electrical/electronic technology due to their unique performances for manufacturing developing, and prudential miniaturized and flexible electrical/electronic devices. In the era of sustainable and clean carbon technology; renewable, alternative, biodegradable, and eco-friendly new carbon resources are required. Biomass could be the answer to offer inspiring carbon allotropes from nature to be suitable for developing electrical/electronic devices. In this article, deriving of the technological carbonaceous material from biomass, studies although they are very limited in the literature on obtaining the …
Poly(Vinyl Alcohol)/Zsm-5 Zeolite Mixed Matrix Membranes For Pervaporation Dehydration Of Ethanol And N-Propanol, Ji Ting Wang, Zhen Huang, Ya Tong Zhu, Si Ning Wang
Poly(Vinyl Alcohol)/Zsm-5 Zeolite Mixed Matrix Membranes For Pervaporation Dehydration Of Ethanol And N-Propanol, Ji Ting Wang, Zhen Huang, Ya Tong Zhu, Si Ning Wang
Turkish Journal of Chemistry
In this study, mixed matrix membranes (MMMs) composed of poly(vinyl alcohol) (PVA) and porous ZSM-5 zeolite are thoroughly investigated for concentrating alcohols of ethanol and n-propanol via dewatering pervaporation. The effects of the zeolite content (10–30 wt.%), feed composition (5–30 wt.% water), and feed temperature (50–90 °C) on the pervaporation flux/separation factor and component permeance/selectivity of these MMMs are examined in detail. These MMMs achieve higher separation efficiency and pervaporation flux than their pure PVA counterparts as expected, even if the dehydration results strongly depend on the pervaporation conditions. The disparity in pervaporation performances acquired for different alcohol solutions may …
Comparison Of Metal-Carbenoid Reactions Of Β-2-Five-Membered Heteroaryl Substituted Α,Β-Unsaturated Ketones, Kumsal Eroğlu, Olcay Anaç, Füsun Şeyma Kişkan
Comparison Of Metal-Carbenoid Reactions Of Β-2-Five-Membered Heteroaryl Substituted Α,Β-Unsaturated Ketones, Kumsal Eroğlu, Olcay Anaç, Füsun Şeyma Kişkan
Turkish Journal of Chemistry
In this study, β-2-heteroaryl substituted (N-methyl 2-pyrrolyl, 2-thiophenyl, 2-furyl) α,β-unsaturated ketones were reacted with two α-diazo carbonyl compounds that had different characteristics (dimethyl diazo malonate and 1-diazo-1-phenyl-propane-2-one) in the presence of both copper and rhodium catalysts. In the case of reactions with N-methyl 2-pyrrolyl α,β-unsaturated ketones, the major product was the insertion derivative. However, in the reactions of 2-thiophenyl and 2-furyl α,β-unsaturated ketones with dimethyl diazomalonate (acceptor-acceptor disubstituted), only dihydrofuran products were formed over carbonyl ylides. When 2-thiophenyl and 2-furyl α,β-unsaturated ketones were reacted with 1-diazo-1-phenyl-propane-2-one (donor-acceptor disubstituted), 1-phenylpropane-1,2-dione was obtained under our reaction conditions.
Intercalation Of Pyrazolone-Based Oxalamide Metal Complexes Into Na-Montmorillonite For Catalytic Liquid-Phase Oxidation Of Phenol Using H2o2, Serhat Uzan, Eyüp Başaran
Intercalation Of Pyrazolone-Based Oxalamide Metal Complexes Into Na-Montmorillonite For Catalytic Liquid-Phase Oxidation Of Phenol Using H2o2, Serhat Uzan, Eyüp Başaran
Turkish Journal of Chemistry
The intercalation of pyrazolone-based oxalamide metal complexes into Na-montmorillonite (Na-MMT) for catalytic liquid-phase oxidation of phenol using H2O2 was undertaken by a flexible ligand method using metal ions including Mn(II), Zn(II), and Sn(II). First, the metal ions were exchanged with the sodium ions of Na-MMT, and then these metal ions were complexed with a new pyrazolone-based oxalamide ligand. The intercalated metal complexes were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, elemental analysis, and thermogravimetric analysis. Phenol was successfully oxidized by heterogeneous catalysts based on Mn(II), Zn(II), and Sn(II) pyrazolone-based oxalamide complexes intercalated into …
Phytochemical Investigation On The Aerial Parts Of Veratrum Versicolor F. Viride Nakai And Their Biological Activities, Seong Su Hong, Jae Yeon Lee, Yeon Woo Jeong, Ji Eun Lee, Yun-Hyeok Choi, Wonsik Jeong, Eun-Kyung Ahn, Chun Whan Choi, Il Ho Ahn, Joa Sub Oh
Phytochemical Investigation On The Aerial Parts Of Veratrum Versicolor F. Viride Nakai And Their Biological Activities, Seong Su Hong, Jae Yeon Lee, Yeon Woo Jeong, Ji Eun Lee, Yun-Hyeok Choi, Wonsik Jeong, Eun-Kyung Ahn, Chun Whan Choi, Il Ho Ahn, Joa Sub Oh
Turkish Journal of Chemistry
Veratrum spp. have traditionally been used in folk medicine to treat various pathologies. In this study, nine compounds, comprising one simple phenolic compound (1), three stilbenoids (2–4), and five flavonoids (5–9), were isolated from the aerial parts of Veratrum versicolor f. viride Nakai. The structures of these compounds were elucidated by spectroscopic analyses and comparison with reported data. Together, all reported compounds were isolated from V. versicolor f. viride for the first time in the study. Among them, two flavone aglycone tricetins (7 and 9) have never been isolated from the genus Veratrum or the family Melanthiaceae. The ethanol extract …
Optimum Pyrolysis Conditions To Prepare The Most Crystalline Boron Carbide Powder From Boric Acid–Mannitol Complex Ester, Abdullah Devri̇m Pekdemi̇r, Müşerref Önal, Yüksel Sarikaya
Optimum Pyrolysis Conditions To Prepare The Most Crystalline Boron Carbide Powder From Boric Acid–Mannitol Complex Ester, Abdullah Devri̇m Pekdemi̇r, Müşerref Önal, Yüksel Sarikaya
Turkish Journal of Chemistry
A weak acidic complex ester (CE) in solid form was prepared by a condensation reaction between very weak boric acid (BA: H3BO3) and (D)-mannitol (MA: C6H14O6) by the molar ratio of BA/MA = 2. A boron carbide (B4C) precursor was obtained from heating of the CE at 400 °C for 4 h. The precursor was pyrolyzed under argon flow in the interval of 1300–1550 °C for 4 h and at 1400 °C for 1–4 h, respectively. The materials were examined using several techniques such as X-ray diffraction analysis, thermal analysis, scanning electron microscopy, particle size distribution, and nitrogen adsorption/desorption. The …
Accelerated Iron Valence Cycling In Fenton System Using Activated Hydrogen Enhanced By Mil-100(Fe) Modified By Nano-Pd0 Particle, Yun-Dong Wang, Yi-Jun Chen, Mei-Na Cheng, Xin Liu
Accelerated Iron Valence Cycling In Fenton System Using Activated Hydrogen Enhanced By Mil-100(Fe) Modified By Nano-Pd0 Particle, Yun-Dong Wang, Yi-Jun Chen, Mei-Na Cheng, Xin Liu
Turkish Journal of Chemistry
In this paper, a novel Fenton reaction system which was called MHACF-MIL-100(Fe) was constructed. In this system, based on active hydrogen-accelerated FeIII reduction, the hydroxyl radical was continuously produced with a trace amount of total iron. The MIL-100(Fe) modified with the nano-Pd0 particle could be used to activate the H2. Under normal temperature and pressure, the target organic pollutants, such as sulfamethazine and 4-chloro phenol, could be degraded fast. In the condition of initial aqueous solution pH 3, 2 g L–1 dosage of MIL-100(Fe) catalyst loaded with nano-Pd0, Pd/MIL-100(Fe), 20 mM 30 wt% hydrogen peroxide, 25 μM ferrous chloride and …
Exploring The Photocatalytic And Photodynamic Effects Of Bodipy-Linked Titanium Dioxide Nanoparticles, Seda Demi̇rel Topel
Exploring The Photocatalytic And Photodynamic Effects Of Bodipy-Linked Titanium Dioxide Nanoparticles, Seda Demi̇rel Topel
Turkish Journal of Chemistry
This study aimed to investigate the photocatalytic and photodynamic actions of a 2,6-diiodinated-BODIPY (2,6-diI2-Bod) photosensitizer (PS) covalently linked to TiO2 nanoparticles (NPs). The TiO2 NPs were synthesized utilizing the hydrothermal technique, yielding an average particle size of 4–5 nm as ascertained by transmission electron microscopy and 6.4 nm as determined by dynamic light scattering measurements. The integration of the nonsoluble Bod PS to TiO2 NPs provided increased dispersibility in physiological media, making it more applicable to photodynamic therapy applications. Bod-TiO2 NPs exhibited moderate efficiency of 56.9% in singlet oxygen generation. Additionally, the photocatalytic behavior of the TiO2 NPs was evaluated …
Scope And Limitations Of The Preparation Of Xanthones Using Eaton’S Reagent, Johann Bosson
Scope And Limitations Of The Preparation Of Xanthones Using Eaton’S Reagent, Johann Bosson
Turkish Journal of Chemistry
Xanthones comprise a large family of heterocycles displaying fascinating biological properties. Many synthetic protocols have been developed for the preparation of natural and nonnatural xanthone derivatives. Among them, condensation reactions between salicylic acid derivatives and phenol partners are highly desirable. Those reactions can be satisfactorily performed using Eaton’s reagent (P2O5 in CH3SO3H). Despite being highly effective with a variety of substrates, this approach presents limitations that depend on the electronic nature of the reaction precursors. The scope and limitations of the Eaton’s reagent-mediated preparation of xanthones are herein presented and discussed. In short, this approach is limited to the utilization …
Extraction/Transportation Of Co2+ Metal Ions With Bis(2-Ethylhexyl) Phosphate Dissolved In Kerosene Using A Multidropped Liquid Membrane Technique, Volkan Demi̇rel, Ramazan Donat
Extraction/Transportation Of Co2+ Metal Ions With Bis(2-Ethylhexyl) Phosphate Dissolved In Kerosene Using A Multidropped Liquid Membrane Technique, Volkan Demi̇rel, Ramazan Donat
Turkish Journal of Chemistry
The transport properties of Co2+ ions from the aqueous donor phase to aqueous acceptor phase with the recently developed multidroplet liquid membrane (MDLM) extraction system were studied. This system serves as a continuous process for the transportation of ions and requires fewer reagents for starting and conducting the procedure. Moreover, the procedure results in fewer waste chemicals and mixtures in comparison to traditional extraction methods. During extraction, bis(2-ethylhexyl) phosphate (D2EHPA) was used as a carrier material and 5% potassium thiocyanate (KSCN) solution was used to obtain a colored complex for UV-Vis detection. By means of several experiments, the optimum D2EHPA …
Removal Of Toxic Cr(Vi) From Aqueous Medium With Effective Magnetic Carbon-Based Nanocomposites, Ferda Ci̇van Çavuşoğlu, Gülsüm Özçeli̇k, Şahi̇ka Sena Bayazi̇t
Removal Of Toxic Cr(Vi) From Aqueous Medium With Effective Magnetic Carbon-Based Nanocomposites, Ferda Ci̇van Çavuşoğlu, Gülsüm Özçeli̇k, Şahi̇ka Sena Bayazi̇t
Turkish Journal of Chemistry
Cr(VI), which has toxic effects, is a heavy metal and it must be removed from the environment due to the various damages it causes. In this study, the removal of Cr(VI) pollutants from aqueous solutions with Fe3O4-based materials using a batch adsorption technique was investigated. Magnetically modified graphene nanoplatelet (GNP)-based nanocomposites were prepared and their structures were characterized by FTIR, XRD, SEM, BET, and TGA techniques. The effects of various physicochemical parameters such as adsorbent dose, contact time, initial Cr(VI) solution concentration, pH, and the presence of coexisting ions (NaCl) on the adsorption process were investigated. Accordingly, the optimum conditions …
Bromination And Conversion Of Tetrahydro-1h-Indene To Bisoxirane With A New Approach: Synthesis, Structural Characterization By Spectroscopic And Theoretical Methods, And Biological Analysis Supported By Dft And Docking, Raşi̇t Fi̇kret Yilmaz, Sultan Erkan, Sali̇h Ökten, Ahmet Tutar, Ertan Şahi̇n
Bromination And Conversion Of Tetrahydro-1h-Indene To Bisoxirane With A New Approach: Synthesis, Structural Characterization By Spectroscopic And Theoretical Methods, And Biological Analysis Supported By Dft And Docking, Raşi̇t Fi̇kret Yilmaz, Sultan Erkan, Sali̇h Ökten, Ahmet Tutar, Ertan Şahi̇n
Turkish Journal of Chemistry
In this study, a new method for synthesizing diepoxides is proposed. Tetrahydroindene 1 was brominated with NBS in the presence of LiClO4 and acetic acid, resulting in the formation of dibromodiacetate derivatives 2 and 3. Treatment of compounds 2 and 3 with NaOH in methanol produced a mixture of diepoxides 4 and 5. Additionally, direct bromination of tetrahydro-1H-indene yielded tetrabromo octahydroindene isomers 6 and 7. The structures of the compounds were characterized using spectroscopic techniques such as 1H NMR, 13C NMR, APT, COSY, and XRD. The new method provides an easy and selective route to access epoxides for the synthesis …
Photophysical, Thermal, And Dft Studies On A Tetraaryl-Azadipyrromethene Ligand And Its Zinc(Ii) Complex, Gökhan Sevi̇nç
Photophysical, Thermal, And Dft Studies On A Tetraaryl-Azadipyrromethene Ligand And Its Zinc(Ii) Complex, Gökhan Sevi̇nç
Turkish Journal of Chemistry
An azadipyrromethene ligand (H1) and homoleptic zinc(II) (H1-Zn) complex were synthesized. The resulting structures were elucidated by NMR, FTIR, and HRMS techniques. The photophysical properties and effects of complexing the zinc(II) atom to azadipyrromethene ligands in solution were studied by means of UV-Vis absorption and fluorescence spectroscopy. Experimental findings were elucidated using density functional theory computations and interfragment charge transfer (IFCT) and electron-hole analyses. The fluorescence features were found to be negligible. The ligand molecule decayed at a rate of 3% while the complex decayed at 2% upon photoirradiation based on photostability experiments. The singlet oxygen quantum yields of the …
Ph Responsive Curcumin Released From Urea-Amine Group Functionalized Mesoporous Organosilica Nanoparticles, Osman Tayyar Arli, Yaşar Gök, Hali̇l Zeki̇ Gök
Ph Responsive Curcumin Released From Urea-Amine Group Functionalized Mesoporous Organosilica Nanoparticles, Osman Tayyar Arli, Yaşar Gök, Hali̇l Zeki̇ Gök
Turkish Journal of Chemistry
Studies on natural products with anticancer properties have gained more importance in recent years in order to not damage healthy tissues during cancer treatments or to perform the treatment causing the least damage. Curcumin is a common natural product with anticancer properties, but its low solubility, instability, and bioavailability have limited its use in clinical applications in cancer research. As a proposed solution to this problem, a new mesoporous organosilica nanocarrier (MON-A) functionalized with a 1,2-diphenylethane-1,2-diamine structure capable of pH-controlled release was prepared in this study. MON-A was characterized by TGA, BET, XRD, FT-IR, and SEM-EDS analyses. Dispersion of MON-A …
Quaternized Chitosan/Pva/Natural Bioactive Agent Electrospun Wound Scaffolds: Production, Characterization, And Investigation Of Release Kinetics, Ezgi Eren Belgin, Cankiz Gi̇zem Deli̇balta
Quaternized Chitosan/Pva/Natural Bioactive Agent Electrospun Wound Scaffolds: Production, Characterization, And Investigation Of Release Kinetics, Ezgi Eren Belgin, Cankiz Gi̇zem Deli̇balta
Turkish Journal of Chemistry
Quaternized chitosan (HTCC) was synthesized and characterized to increase chitosan solubility. Then HTCC was electrospun with poly (vinyl alcohol) (PVA) and prepared natural bioactive agent (Calendula officinalis) extract was loaded onto fibers for wound scaffold applications. Morphological, structural, and mechanical characterization of the produced wound scaffolds was performed and their in vitro bioactive component release behavior was investigated. As a result, it was observed that the degree of quaternization of chitosan was 0.89, and synthesized HTCC was soluble in acidic, basic, alkaline media and could be electrospun with PVA in the presence of a natural bioactive agent. The presence of …
Production Of Gelatin Fibrous Mats Using Different Nanofiber Production Methods For Medical Applications And Comparison Of Their Properties, Melike Güngör, Kevser Sağlamkol, Zeynep Yağmur Baydemi̇r, Ali̇ Kiliç
Production Of Gelatin Fibrous Mats Using Different Nanofiber Production Methods For Medical Applications And Comparison Of Their Properties, Melike Güngör, Kevser Sağlamkol, Zeynep Yağmur Baydemi̇r, Ali̇ Kiliç
Turkish Journal of Chemistry
In the literature, there are studies on medical applications using different nanofiber production methods with natural polymers. However, each system has different fiber-forming capabilities. For this reason, in this study, we investigated the production of nanofibers from a biodegradable natural polymer, gelatin, using four separate nanofiber production methods, namely electrospinning (ES), electroblowing (EB), solution blowing (SB), and centrifugal spinning (CS). Our aim was to determine the most suitable fibrous web structure for medical applications and contribute to science in this respect. It was observed that the thinnest fibers (386 nm) and the heaviest mats (15.975 g m–2) were produced by …
Synthesis And Singlet Oxygen Generation Of Boron- 2-(4,5-Dibromo-1h-Imidazole-2-Yl)-3,5-Dipyrazolopyridine Complex For Antimicrobial Photodynamic Therapy, Zeynep Ekmekçi̇, Seda Karaoğlu
Synthesis And Singlet Oxygen Generation Of Boron- 2-(4,5-Dibromo-1h-Imidazole-2-Yl)-3,5-Dipyrazolopyridine Complex For Antimicrobial Photodynamic Therapy, Zeynep Ekmekçi̇, Seda Karaoğlu
Turkish Journal of Chemistry
In this study, the pyridine side of a boron 2-(2'-pyridyl) imidazole (BOPIM) core, which has very few derivatives synthesized in the literature and can show fluorescence properties in solid form, was derivatized with 1-methylpyrazole, predicted to have activity against fungi or bacteria according to the literature. Additionally, its imidazole side was brominated to increase the efficiency of singlet oxygen production by increasing the intersystem crossing. The photophysical properties of the new synthesized BOPIM derivative were investigated in general organic solvents with different polarities. While the wavelength of the maximum absorbance was determined as 406 nm in CH2Cl2 and THF, the …
Comparatively Sonophotochemical And Photochemical Studies Of Phthalocyanines With Cationic Substituents On Nonperipheral Positions, Mukaddes Özçeşmeci̇, Ceren Can Karanlik, Ali̇ Erdoğmuş, Esi̇n Hamuryudan
Comparatively Sonophotochemical And Photochemical Studies Of Phthalocyanines With Cationic Substituents On Nonperipheral Positions, Mukaddes Özçeşmeci̇, Ceren Can Karanlik, Ali̇ Erdoğmuş, Esi̇n Hamuryudan
Turkish Journal of Chemistry
The term sonophotodynamic therapy (SPDT) refers to a combination of sonodynamic therapy (SDT) and photodynamic therapy (PDT), in which the efficacy of the treatment is boosted by utilizing the proper amount of a sensitizer that is responsive to both light and ultrasound. Although it has been proven in photophysicochemical studies that SPDT enhances singlet oxygen production, related studies in the literature are very limited. Considering this situation, this study aims to investigate the efficacy of synthesized phthalocyanines in terms of PDT and SPDT. The singlet oxygen quantum values calculated as 0.13 for 5, 0.44 for 6, and 0.61 for 7 …
A Facile Tert-Butyl Nitrite-Assisted Preparation Of Deamino Graphitic Carbon Nitride (Da-Gcn) As A Photocatalyst For The C-H Arylation Of Heteroarenes Using Anilines As Radical Source, Palani Natarajan, Begümhan Karapinar Koç, Önder Meti̇n
A Facile Tert-Butyl Nitrite-Assisted Preparation Of Deamino Graphitic Carbon Nitride (Da-Gcn) As A Photocatalyst For The C-H Arylation Of Heteroarenes Using Anilines As Radical Source, Palani Natarajan, Begümhan Karapinar Koç, Önder Meti̇n
Turkish Journal of Chemistry
In pristine graphitic carbon nitride (g-CN), amino groups often function as structural defects that trap photogenerated charges, resulting in low photocatalytic activity as well as reaction with nitrite, aldehyde, etc., ensuing in poor product yield. Without significantly altering the optical characteristics, the removal of amino groups is necessary to increase the photocatalytic activity and structural stability of pristine g-CN. The deamino graphitic carbon nitride (DA-gCN-5) was prepared by tert-butyl nitrite (TBN)- treatment, characterized and used as a photocatalyst for the radical C-H arylation of heteroarenes using anilines as radical source. Indeed, the photophysical characteristics of DA-gCN-5 and those of pristine …
Reducible Tungsten(Vi) Oxide-Supported Ruthenium(0) Nanoparticles: Highly Active Catalyst For Hydrolytic Dehydrogenation Of Ammonia Borane, Serdar Akbayrak, Yalçin Tonbul, Sai̇m Özkar
Reducible Tungsten(Vi) Oxide-Supported Ruthenium(0) Nanoparticles: Highly Active Catalyst For Hydrolytic Dehydrogenation Of Ammonia Borane, Serdar Akbayrak, Yalçin Tonbul, Sai̇m Özkar
Turkish Journal of Chemistry
Reducible WO3 powder with a mean diameter of 100 nm is used as support to stabilize ruthenium(0) nanoparticles. Ruthenium(0) nanoparticles are obtained by NaBH4 reduction of ruthenium(III) precursor on the surface of WO3 support at room temperature. Ruthenium(0) nanoparticles are uniformly dispersed on the surface of tungsten(VI) oxide. The obtained Ru0 /WO3 nanoparticles are found to be active catalysts in hydrolytic dehydrogenation of ammonia borane. The turnover frequency (TOF) values of the Ru0 /WO3 nanocatalysts with the metal loading of 1.0%, 2.0%, and 3.0% wt. Ru are 122, 106, and 83 min-1, respectively, in releasing hydrogen gas from …
Phytochemical Analysis And Molecular Docking Studies Of Two Endemic Varieties Of Salvia Sericeotomentosa, Gülbahar Özge Ali̇m Toraman, Halil Şenol, Seçi̇l Yazici Tütüni̇ş, Nur Tan, Gülaçti Topçu
Phytochemical Analysis And Molecular Docking Studies Of Two Endemic Varieties Of Salvia Sericeotomentosa, Gülbahar Özge Ali̇m Toraman, Halil Şenol, Seçi̇l Yazici Tütüni̇ş, Nur Tan, Gülaçti Topçu
Turkish Journal of Chemistry
The use of medicinal plants for treating various diseases dates back thousands of years and has been a part of many cultures around the world. Various parts of plants, including roots, leaves, and flowers, and their extracts have been used to develop remedies to cure different ailments like fever, pain, inflammation, infections, among others. In this research, the aerial parts of both Salvia varieties were extracted with ethanol and water to obtain infusion and decoction, separately. S. sericeotomentosa var. hatayica Celep & Doğan (SH) and Salvia sericeotomentosa Rech. f. var. sericeotomentosa (ST) plants were chemically analyzed for polar compounds using …
Recommendations For Improving The Experimental Protocol For The Determination Of Photocatalytic Activity By Nitric Oxide Oxidation Measurements, Seli̇n Ernam, Zeynep Ece Akgül, Deni̇z Üner
Recommendations For Improving The Experimental Protocol For The Determination Of Photocatalytic Activity By Nitric Oxide Oxidation Measurements, Seli̇n Ernam, Zeynep Ece Akgül, Deni̇z Üner
Turkish Journal of Chemistry
The photocatalytic nitric oxide (NO) oxidation reaction is used as a standard diagnostic tool for photocatalytic activity according to the well-defined protocol described by ISO Standard 22197-1-2007. This protocol identifies the negative peak showing a NOx concentration drop during a gas flow switch from the calibration bypass to the reactor as adsorption of NOx on the surface. Evidence is provided for this first transient to be due to a dilution effect in the gas phase within the reactor. With proper models of residence time distribution analysis, this transient revealed the internal hydrodynamics and it can be used to determine the …
Electrochemical Dna Biosensors Developed For The Monitoring Of Biointeractions With Drugs: A Review, Kadri̇ye Arzum Erdem Gürsan, Muhammed Hüseyi̇n Şentürk, Esma Yildiz Göz, Meltem Maral, Ayla Yildirim, Ayşen Bozoğlu, Burak Kivrak, Nesli̇han Ceren Ay
Electrochemical Dna Biosensors Developed For The Monitoring Of Biointeractions With Drugs: A Review, Kadri̇ye Arzum Erdem Gürsan, Muhammed Hüseyi̇n Şentürk, Esma Yildiz Göz, Meltem Maral, Ayla Yildirim, Ayşen Bozoğlu, Burak Kivrak, Nesli̇han Ceren Ay
Turkish Journal of Chemistry
The interaction of drugs with DNA is important for the discovery of novel drug molecules and for understanding the therapeutic effects of drugs as well as the monitoring of side effects. For this reason, many studies have been carried out to investigate the interactions of drugs with nucleic acids. In recent years, a large number of studies have been performed to electrochemically detect drug-DNA interactions. The fast, sensitive, and accurate results of electrochemical techniques have resulted in a leading role for their implementation in this field. By means of electrochemical techniques, it is possible not only to demonstrate drug-DNA interactions …
Comparative Study Of Electrochemical-Based Sensors And Immunosensors In Terms Of Advantageous Features For Detection Of Cancer Biomarkers, Göksu Özçeli̇kay, Ahmet Çeti̇nkaya, Sari̇ye İrem Kaya, Si̇bel Ayşil Özkan
Comparative Study Of Electrochemical-Based Sensors And Immunosensors In Terms Of Advantageous Features For Detection Of Cancer Biomarkers, Göksu Özçeli̇kay, Ahmet Çeti̇nkaya, Sari̇ye İrem Kaya, Si̇bel Ayşil Özkan
Turkish Journal of Chemistry
Cancer, becoming increasingly common globally, has a high mortality rate. Despite the much research on diagnosis and treatment methods, the benefits of technological developments, and newly developed sensor devices, cancer is still one of the leading causes of death worldwide. Early detection using powerful and noninvasive tools could be a future focus for prognosis and treatment follow-up. Therefore, electrochemical biosensors can be a strong choice for the detection of cancer biomarkers (such as alpha-fetoprotein, cytochrome c, prostate-specific antigen, myoglobin, carcinoembryonic antigen, alpha-fetoprotein, a cancer antigen, epidermal growth factor receptor, vascular endothelial growth factor, circulating tumor cell, and breast cancer antigen …
Metal-Organic Frameworks As Photocatalysts In Energetic And Environmental Applications, Eli̇f Özcan, Zeli̇ha Mermer, Yunus Zorlu
Metal-Organic Frameworks As Photocatalysts In Energetic And Environmental Applications, Eli̇f Özcan, Zeli̇ha Mermer, Yunus Zorlu
Turkish Journal of Chemistry
Metal-organic frameworks (MOFs) are an exciting new class of porous materials with great potential for photocatalytic applications in the environmental and energy sectors. MOFs provide significant advantages over more traditional materials when used as photocatalysts due to their high surface area, adaptable topologies, and functional ability. In this article, we summarize current developments in the use of MOFs as photocatalysts for a variety of applications, such as CO2 reduction, water splitting, pollutant degradation, and hydrogen production. We discuss the fundamental properties of MOFs that make them ideal for photocatalytic applications, as well as strategies for improving their performance. The opportunities …
Determination Of Ketamine Using Melamine-Modified Gold Nanoparticles, Güler Güneş, Zi̇ya Can, Ayşem Arda, Mustafa Reşat Apak
Determination Of Ketamine Using Melamine-Modified Gold Nanoparticles, Güler Güneş, Zi̇ya Can, Ayşem Arda, Mustafa Reşat Apak
Turkish Journal of Chemistry
Ketamine is used in medicine because of its anaesthetic and antidepressant effects at low doses. Unfortunately, due to its narcotic effect when used at high doses, its abuse among young people is increasing. It is also one of the most common drugs used in rape. Therefore, there is a need for fast and inexpensive tests that can be performed on-site. With the advancement of nanotechnology, nanoparticle-based approaches have found their place in selective analyses as in many fields. In the developed method, firstly gold nanoparticles were modified with melamine (AuNPs@Mel). Under optimized conditions, hydrogen bonds formed between ketamine and AuNPs@Mel …
Advanced Tetra Amino (Ata-100) Cobalt(Ii) Phthalocyanine-Based Metallo-Covalent Organic Polymer For Sensitively Detecting Volatile Organic Compounds, Günseli̇ Güney, Gülay Altindemi̇r Kaplan, Ci̇hat Taşaltin, İlke Gürol
Advanced Tetra Amino (Ata-100) Cobalt(Ii) Phthalocyanine-Based Metallo-Covalent Organic Polymer For Sensitively Detecting Volatile Organic Compounds, Günseli̇ Güney, Gülay Altindemi̇r Kaplan, Ci̇hat Taşaltin, İlke Gürol
Turkish Journal of Chemistry
The synthesis and characterization of a novel covalent organic polymer cobalt (II) phthalocyanine (ATA-100) including tetra amino group is described for the first time. This covalent organic polymer (COP) is characterized by FTIR, TGA, RAMAN, PXRD, and SEM-EDS. The developed sensor is tested for acetone, ethyl butyrate, n-hexane, chloroform, and n-butyraldehyde in a range of 80-10,900 ppm. ATA-100 showed the highest sensitivity for ethyl butyrate. The results have confirmed the possibility of utilizing ATA-100 COP-based surface acoustic wave (SAW) sensors for a wide variety of applications, including indoor air quality and environmental monitoring of volatile organic compounds (VOCs).
Benzimidazol-2-Ylidene Ruthenium Complexes For C-N Bond Formation Through Alcohol Dehydrogenation, Zahid Nawaz, Nevi̇n Gürbüz, Muhammed Naveed Zafar, Namik Özdemi̇r, Beki̇r Çeti̇nkaya, İsmai̇l Özdemi̇r
Benzimidazol-2-Ylidene Ruthenium Complexes For C-N Bond Formation Through Alcohol Dehydrogenation, Zahid Nawaz, Nevi̇n Gürbüz, Muhammed Naveed Zafar, Namik Özdemi̇r, Beki̇r Çeti̇nkaya, İsmai̇l Özdemi̇r
Turkish Journal of Chemistry
A low temperature hydrogen borrowing approach to generate secondary amines using benzimidazole-based N-heterocyclic carbene (BNHC) ruthenium complexes is reported. A series of the piano-stool complexes of the type [(η6 -p-cymene)(BNHC)RuCl2 ] (1a-g) were synthesized via one-pot reaction of the NHC salt precursor, Ag2 O, and [RuCl2 (p-cymene)]2 and characterized using conventional spectroscopic techniques. The geometry of two precursors, [(η6 -p-cymene)(Me4BnMe2 BNHCCH2OxMe)RuCl2 ] (1f) and [(η6 -p-cymene)(Me5BnMe2 BNHCCH2OxMe)RuCl2 ] (1g), was studied by single crystal X-ray diffraction. These catalysts were found to dehydrogenate alcohols efficiently at temperatures as low as 50 °C to allow Schiff-base condensation and subsequent …