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Preparation, Structure Elucidation, And Antioxidant Activity Of New Bis(Thiosemicarbazone) Derivatives, Hasan Yakan
Preparation, Structure Elucidation, And Antioxidant Activity Of New Bis(Thiosemicarbazone) Derivatives, Hasan Yakan
Turkish Journal of Chemistry
Schiff-base-bearing new bis(thiosemicarbazone) derivatives were prepared from terephthalaldehyde and various thiosemicarbazides. FT--IR,$^{\, 1}$H NMR, $^{13}$C NMR, and UV--Vis spectroscopic methods and elemental analysis were used to elucidate the identification of the synthesized molecules. The in vitro antioxidant activity of the synthesized compounds was analysed with the 1,1-diphenyl-2-picryl hydrazyl free-radical-trapping process. The synthesized compounds exhibited lower antioxidant activity than the standard ascorbic acid. IC$_{50}$ values of the synthesized molecules measured from 3.81 $\pm $ 0.01 to 29.05 $\pm $ 0.11 $\mu$M. Among the synthesized compounds, compound 3 had the best antioxidant activity. Moreover, this study explained the structure--activity relationship of the …
Fluorescent Sensing Platform For Low-Cost Detection Of Cu$^{\Mathbf{2+}}$ By Coumarin Derivative: Dft Calculation And Practical Application In Herbal And Black Tea Samples, Tahi̇r Savran, Abdurrahman Karagöz, Şükri̇ye Ni̇han Karuk Elmas, Duygu Aydin, Furkan Özen, Kenan Koran, Fatma Nur Arslan, Ahmet Orhan Görgülü, İbrahi̇m Yilmaz
Fluorescent Sensing Platform For Low-Cost Detection Of Cu$^{\Mathbf{2+}}$ By Coumarin Derivative: Dft Calculation And Practical Application In Herbal And Black Tea Samples, Tahi̇r Savran, Abdurrahman Karagöz, Şükri̇ye Ni̇han Karuk Elmas, Duygu Aydin, Furkan Özen, Kenan Koran, Fatma Nur Arslan, Ahmet Orhan Görgülü, İbrahi̇m Yilmaz
Turkish Journal of Chemistry
A fluorogenic probe based on a coumarin-derivative for Cu$^{2+}$ sensing in CH$_{3}$CN/H$_{2}$O media (v/v, 95/5, 5.0 \textmu M) was developed and applied in real samples. 3-(4-chlorophenyl)-6,7-dihydroxy-coumarin (MCPC) probe was obtained by synthetic methodologies and identified by spectral techniques. The probe MCPC showed remarkable changes with a ``turn-off'' fluorogenic sensing approach for the monitoring of Cu$^{2+}$ at 456 nm under an excitation wavelength of 366 nm. The response time of the probe MCPC was founded as only 1 min. The detection limit of the probe MCPC was recorded to be 1.47 nM. The binding constant and possible stoichiometric ratio (1:1) values …
New Protocols For The Synthesis Of 5-Amino-7-(4-Phenyl)-4,7-Dihydro-[1,2,4]Triazolo[1,5-A]Pyrimidine-6-Carboxylate Esters Using An Efficient Additive, Nader Ghaffari Khaligh, Taraneh Mihankah, Salam Titinchi, Zohreh Shahnavaz, Mohd Rafie Johan
New Protocols For The Synthesis Of 5-Amino-7-(4-Phenyl)-4,7-Dihydro-[1,2,4]Triazolo[1,5-A]Pyrimidine-6-Carboxylate Esters Using An Efficient Additive, Nader Ghaffari Khaligh, Taraneh Mihankah, Salam Titinchi, Zohreh Shahnavaz, Mohd Rafie Johan
Turkish Journal of Chemistry
This work introduces a new additive named 4,4'-trimethylenedipiperidine for the practical and ecofriendly preparation of ethyl 5-amino-7-(4-phenyl)-4,7-dihydro-[1,2,4]triazolo[1,5-$a$]pyrimidine-6-carboxylate derivatives. This chemical is commercially available and easy to handle. It also possesses a low melting point and a broad liquid range temperature, high thermal stability, and good solubility in water. Based on green chemistry principles, the reaction was performed in a) a mixture of green solvents i.e. water and ethanol (1:1 v/v) at reflux temperature, and b) the additive was liquefied at 65 $^{\circ}$C and the reaction was conducted in the liquid state of the additive. High yields of the desired triazolo-pyrimidines …
New Sandwich-Type Polymeric Potassium-Dicyanoargentate(I) Complex: Synthesis, Characterization And Enzymatic Activity, Nesri̇n Korkmaz
New Sandwich-Type Polymeric Potassium-Dicyanoargentate(I) Complex: Synthesis, Characterization And Enzymatic Activity, Nesri̇n Korkmaz
Turkish Journal of Chemistry
Coordination compounds containing dicyanoargentate(I) have remarkable biological potential due to their therapeutic antibacterial, antifungal, antibiofilm, and anticancer properties. In this study, a new dicyanoargentate(I)-based complex was synthesized and characterized by various procedures (elemental, thermal, FT-IR for complex) involving crystal analysis of the complex. In addition, the biological activity of this new compound on the acetylcholinesterase (AChE) enzyme, an important enzyme for the nervous system, was investigated. When the infrared (IR) spectrum of the complex is examined, the OH vibration peak resulting from H$_{2}$O molecules in the structure at 3948-3337 cm$^{-1}$ and at 2138 cm$^{-1}$, along with a CN peak coordinated …
Effect Of Cnt Incorporation On Pan/Ppy Nanofibers Synthesized By Electrospinning Method, Ati̇ke İnce Yardimci, Meti̇n Tanoğlu, Selahatti̇n Yilmaz, Yusuf Selamet
Effect Of Cnt Incorporation On Pan/Ppy Nanofibers Synthesized By Electrospinning Method, Ati̇ke İnce Yardimci, Meti̇n Tanoğlu, Selahatti̇n Yilmaz, Yusuf Selamet
Turkish Journal of Chemistry
In this study, carbon nanotubes (CNTs) added polyacrylonitrile/polypyrrole (PAN/PPy) electrospun nanofibers were produced. Average diameters of the nanofibers were measured as 268 and 153 nm for 10 and 25 wt% of PPy contents, respectively. A relatively higher strain to failure values (23.3%) were observed for the low PPy content. When as-grown CNTs (1 and 4 wt%) were added into the PAN/PPy blends, disordered nanofibers were observed to form within the microstructure. To improve the interfacial properties of CNTs/PAN/PPy composites, CNTs were functionalized with H$_{2}$SO$_{4}$/HNO$_{3}$/HCl solution. The functionalized CNTs were well dispersed within the nanofibers and aligned along the direction of …
A Comparative Study On The Monovalent And Divalent Cation Separation Of Polymeric Films And Membranes From Salt Solutions Under Diffusion-Dialysis, Serkan Acar, Hacer Yeşi̇m Cengi̇z, Ayça Ergün, Eymen Konyali, Hüseyi̇n Deli̇göz
A Comparative Study On The Monovalent And Divalent Cation Separation Of Polymeric Films And Membranes From Salt Solutions Under Diffusion-Dialysis, Serkan Acar, Hacer Yeşi̇m Cengi̇z, Ayça Ergün, Eymen Konyali, Hüseyi̇n Deli̇göz
Turkish Journal of Chemistry
This study deals with selective separation of mono- and divalent cations from aqueous salt solutions using polymeric films based on polyethylene (PE) and polyamide6 (PA6), and two different commercial nanofiltration (NF) membranes. The diffusion rates (D) of ions (Na$^{+}$ and Ca$^{2+})$, separation factors ($\alpha )$ and ion rejections (R) of the films and NF membranes are examined comparatively as well as their surface morphology and hydrophilicity. It is observed that the diffusion rates of Na$^{+}$are in the range of 0.7-1.8 $\times $ 10$^{-8}$cm$^{2}$.s$^{-1\, }$in the decreasing order of PE $>$ NF90 $>$ NF270 $>$ PA6 while Ca$^{2+\, …
Bis Benzothiophene Schiff Bases: Synthesis And In Silico-Guided Biological Activity Studies, Yasemi̇n Ünver, Di̇lek Ünlüer, Şahi̇n Di̇rekel, Serdar Durdaği
Bis Benzothiophene Schiff Bases: Synthesis And In Silico-Guided Biological Activity Studies, Yasemi̇n Ünver, Di̇lek Ünlüer, Şahi̇n Di̇rekel, Serdar Durdaği
Turkish Journal of Chemistry
Since benzo [$b$] thiophene scaffold is one of the privileged structures in drug discovery as this core exhibitsactivities for different biological problems, in this study bis (benzo[$b$]thiophene-2-yl) alkyl methanimine derivatives (1-9) were synthesized by reacting benzo[$b$]thiophene-2-carbaldehyde with diamines. All newly compounds were characterized by IR, $^{1}$H NMR and $^{13}$C NMR spectroscopic methods. Synthesized compounds were investigated using binary QSAR-based models on therapeutic activity prediction of synthesized compounds and they showed high predicted activities in following diseases: bacterial, angina, allergy, depression and obesity. Thus, they were then tested for their antimicrobial and antileishmanial activities as a result of this theoretical study. …
A Novel Proton-Exchange Porous Silicon Membrane Production Method For \Textmu Dmfcs, Meltem Gör Bölen, Tevhi̇t Karacali
A Novel Proton-Exchange Porous Silicon Membrane Production Method For \Textmu Dmfcs, Meltem Gör Bölen, Tevhi̇t Karacali
Turkish Journal of Chemistry
This study introduces a new production method to use as a porous silicon-based proton exchange membrane for μDMFCs. In this respect, EIS, fuel crossover test, and fuel cell performance test at the μDMFC sample cell are performed at room temperature on a porous silicon-based membrane that was produced for passive mode μDMFC as a proton exchange membrane. The reason for performing the fuel crossover test is to ensure the silicon opened pores along the silicon wafer and to examine the fuel permeability of the membrane. The fuel crossover test shows that the fuel cell provides energy for about 60 min …
Effect Of Mg Doping On Morphology, Photocatalytic Activity And Related Biological Properties Of Zn$_{\Mathbf{1-X}}$ Mg$_{X}$ O Nanoparticles, Bestenur Yalçin, Doğan Akcan, İbrahi̇m Ertuğrul Yalçin, Mehmet Can Alphan, Kenan Şentürk, İbrahi̇m İlker Özyi̇ği̇t, Lütfi̇ Arda
Effect Of Mg Doping On Morphology, Photocatalytic Activity And Related Biological Properties Of Zn$_{\Mathbf{1-X}}$ Mg$_{X}$ O Nanoparticles, Bestenur Yalçin, Doğan Akcan, İbrahi̇m Ertuğrul Yalçin, Mehmet Can Alphan, Kenan Şentürk, İbrahi̇m İlker Özyi̇ği̇t, Lütfi̇ Arda
Turkish Journal of Chemistry
The objective of this study is to synthesize ZnO and Mg doped ZnO (Zn$_{1-x}$Mg$_{x}$O) nanoparticles via the sol-gel method, and characterize their structures and to investigate their biological properties such as antibacterial activity and hemolytic potential.Nanoparticles (NPs) were synthesized by the sol-gel method using zinc acetate dihydrate (Zn(CH$_{3}$COO)$_{2}$.2H$_{2}$O) and magnesium acetate tetrahydrate (Mg(CH$_{3}$COO)$_{2}$.4H$_{2}$O) as precursors. Methanol and monoethanolamine were used as solvent and sol stabilizer, respectively. Structural and morphological characterizations of Zn$_{1-x}$Mg$_{x}$O nanoparticles were studied by using XRD and SEM-EDX, respectively. Photocatalytic activities of ZnO and selected Mg-doped ZnO (Zn$_{1-x}$Mg$_{x}$O) nanoparticles were investigated by degradation of methylene blue (MeB). Results …
Synthesis Of New Cyclotriphosphazene Derivatives Bearing Schiff Bases And Theirthermal And Absorbance Properties, Semi̇h Doğan, Süreyya Oğuz Tümay, Ceylan Mutlu Balci, Serkan Yeşi̇lot, Serap Beşli̇
Synthesis Of New Cyclotriphosphazene Derivatives Bearing Schiff Bases And Theirthermal And Absorbance Properties, Semi̇h Doğan, Süreyya Oğuz Tümay, Ceylan Mutlu Balci, Serkan Yeşi̇lot, Serap Beşli̇
Turkish Journal of Chemistry
In this study, a series of cyclotriphosphazene derivatives containing a Schiff base (3a-3d) were synthesized by the reactions of hexachlorocyclotriphosphazene (1) with bis-aryl Schiff bases (2a-2d) having different terminal groups (H, F, Cl, and Br). The products (3a-3d) were characterized by elemental and mass analyses, FT-IR, and $^{1}$H, $^{13}$C, and 31 P NMR spectroscopies. Furthermore, the structure of compound 3a was also determined by X-ray crystallography. The thermal behaviors and the spectral properties of the new cyclotriphosphazene compounds (3a-3d) were investigated and the results were compared in the series.
Synthesis And Spectroscopic Properties Of (N/O) Mono- Anddispirocyclotriphosphazene Derivatives With Benzyl Pendant Arms: Study Ofbiological Activity?, Özlem İşcan, Reşi̇t Cemaloğlu, Nuran Asmafi̇li̇z, Zeynel Kiliç, Leyla Açik, Peli̇n Özbeden, Tuncer Hökelek
Synthesis And Spectroscopic Properties Of (N/O) Mono- Anddispirocyclotriphosphazene Derivatives With Benzyl Pendant Arms: Study Ofbiological Activity?, Özlem İşcan, Reşi̇t Cemaloğlu, Nuran Asmafi̇li̇z, Zeynel Kiliç, Leyla Açik, Peli̇n Özbeden, Tuncer Hökelek
Turkish Journal of Chemistry
The Cl replacement reactions of hexachlorocyclotriphosphazene (trimer; N3 P3 Cl6) with sodium (N-benzyl)- aminopropanoxides (1 and 2) produced monospiro- (3 and 4), cis-, and trans-dispirocyclotriphosphazenes (13-16). The monospiro tetrakis-aminocyclotriphosphazenes (5-12) were obtained by the Cl substitutions of 3 and 4 with different secondary amines. The cis- (13 and 14) and trans-dispirophosphazenes (15 and 16) possessed 2 chiral P centers, and they were able to present meso and racemic forms, respectively. Moreover, the structures of compounds 5 and 14 were designated using X-ray data. The absolute configuration of compound 14 was found as SR in the solid state. Analytical and spectroscopic …
Highly Sensitive Fluorometric Method Based On Nitrogen-Doped Carbon Dotclusters For Tartrazine Determination In Cookies Samples, Abi̇di̇n Gümrükçüoğlu, Aysel Başoğlu, Sevgi̇ Kolayli, Sali̇ha Di̇nç, Meryem Kara, Mi̇raç Ocak, Ümmühan Ocak
Highly Sensitive Fluorometric Method Based On Nitrogen-Doped Carbon Dotclusters For Tartrazine Determination In Cookies Samples, Abi̇di̇n Gümrükçüoğlu, Aysel Başoğlu, Sevgi̇ Kolayli, Sali̇ha Di̇nç, Meryem Kara, Mi̇raç Ocak, Ümmühan Ocak
Turkish Journal of Chemistry
Nitrogen-doped carbon nanodots (CDs) were prepared via the solvothermal method, using urea and triethylene glycol as the starting materials. The as-prepared CDs had individual diameters of approximately 100 nm and were in clusters of different sizes. The surface composition and optical properties of the as-prepared CDs were characterized. They exhibited multicolor emission properties in the visible range when excited with a wide wavelength range. The aqueous solution of the CDs was used in highly sensitive tartrazine determination. The fluorescence quenching of the CDs was in a linear relationship with the concentrations of tartrazine in the range of 0.5-30.0 μM. The …
Synthesis, Optical, And Structural Properties Of Bisphenol-Bridgedaromatic Cyclic Phosphazenes, Bünyemi̇n Çoşut, Burcu Topaloğlu Aksoy, Süreyya Oğuz Tümay, Ahmet Şenocak, Serkan Yeşi̇lot
Synthesis, Optical, And Structural Properties Of Bisphenol-Bridgedaromatic Cyclic Phosphazenes, Bünyemi̇n Çoşut, Burcu Topaloğlu Aksoy, Süreyya Oğuz Tümay, Ahmet Şenocak, Serkan Yeşi̇lot
Turkish Journal of Chemistry
Phenoxy- and naphthoxy-substituted bisphenol-bridged cyclic phosphazenes were synthesized in 2 steps and their thermal, photophysical, and electrochemical properties were investigated. The structures of the cyclic phosphazene compounds were determined by ESI-MS mass spectrometry and $^{1}$H, $^{13}$C, and $^{31}$P NMR spectroscopies. The photophysical studies of phenoxy- and naphthoxy-substituted bridged cyclophosphazenes were investigated by means of absorption and fluorescence spectroscopies in different solvents. Thermal and electrochemical properties of the target compounds were also studied. Furthermore, the excimer emissions through intramolecular interactions in solution and in solid state were investigated by fluorescence spectroscopy and the theoretical calculations were performed in detail using DFT.
Chemosensor Properties Of 7-Hydroxycoumarin Substituted Cyclotriphosphazenes?, Gönül Yeni̇lmez Çi̇ftçi̇, Sergen Yilmaz, Nagi̇han Bayik, Eli̇f Şenkuytu, Esra Nur Kaya, Mahmut Durmuş, Mustafa Bulut
Chemosensor Properties Of 7-Hydroxycoumarin Substituted Cyclotriphosphazenes?, Gönül Yeni̇lmez Çi̇ftçi̇, Sergen Yilmaz, Nagi̇han Bayik, Eli̇f Şenkuytu, Esra Nur Kaya, Mahmut Durmuş, Mustafa Bulut
Turkish Journal of Chemistry
The newly synthesized cyclotriphosphazene cored coumarin chemosensors 5, 6, and 7 were successfully characterized by $^{1}$H NMR, $^{31}$P NMR, and MALDI-TOF mass spectrometry. Additionally, the photophysical and metal sensing properties of the targeted compounds were determined by fluorescence spectroscopy in the presence of various metals (Li$^{+}$, Na$^{+}$ , K$^{+}$ , Cs$^{+}$ , Mg2$^{+}$ , Ca2$^{+}$ , Ba2$^{+}$ , Cr3$^{+}$ , Mn2$^{+}$ , Fe3$^{+}$ , Co2$^{+}$ , Al3$^{+}$ , Hg$^{+}$ , Cu2$^{+}$ , Zn2$^{+}$ , Ag$^{+}$ , and Cd2$^{+}$) . The fluorescence titration results showed that compounds 5, 6, and 7 could be employed as fluorescent chemosensors for Fe3$^{+}$ ions with …
Nucleophilic Substitution Reactions Of Monofunctional Nucleophilic Reagents Withcyclotriphosphazenes Containing 2,2-Dioxybiphenyl Units, Esra Tanriverdi̇ Eçi̇k, Hani̇fe İbi̇şoğlu, Gönül Yeni̇lmez Çi̇ftçi̇, Gi̇zem Demi̇r, Eda Erdemi̇r, Fatma Yüksel
Nucleophilic Substitution Reactions Of Monofunctional Nucleophilic Reagents Withcyclotriphosphazenes Containing 2,2-Dioxybiphenyl Units, Esra Tanriverdi̇ Eçi̇k, Hani̇fe İbi̇şoğlu, Gönül Yeni̇lmez Çi̇ftçi̇, Gi̇zem Demi̇r, Eda Erdemi̇r, Fatma Yüksel
Turkish Journal of Chemistry
The nucleophilic substitution reactions of mono- and bis-spiro-2,2' -dioxybiphenyl cyclotriphosphazenes (3 and 4) with cyclopropanemethylamine (5) and aniline (6) were performed in the presence of trimethylamine in THF. Five novel cyclopropanemethylamino- and anilino-substituted spiro-2,2' -dioxybiphenyl cyclotriphosphazene derivatives (7-11) were obtained from these reactions. The molecular structures of the new cyclotriphosphazene derivatives (7- 11) were characterized by elemental analysis, MALDI-TOF MS, FT-IR, and NMR ( $^{31}$P and $^{1}$H) spectroscopies. The structure of the spiro-(2,2' -dioxybiphenyl)-bis-(anilino)-cyclotriphosphazene (11) was also determined by single-crystal X-ray crystallography.
One-Pot Synthesis Of Vox /Al2 O3 As Efficient Catalysts For Propanedehydrogenation, Guangjian Wang, Hao Xu, Kai Lu, Zhihao Ding, Liancheng Bing
One-Pot Synthesis Of Vox /Al2 O3 As Efficient Catalysts For Propanedehydrogenation, Guangjian Wang, Hao Xu, Kai Lu, Zhihao Ding, Liancheng Bing
Turkish Journal of Chemistry
Vanadium oxides, as highly efficiently catalysts, are widely applied in various catalytic reactions, such as the dehydrogenation of light alkanes and epoxidation of alkenes. In this paper, a series of VO$_{x}$ /Al$_{2}$O$_{3}$ catalysts were fabricated by the 1-pot method for catalytic propane dehydrogenation. The results indicated that the VO$_{x}$ /Al$_{2}$O$_{3}$ catalysts with loading of 10 wt.% vanadium exhibited optimized catalytic performance. The as-prepared catalysts were characterized by N$_{2}$ adsorption-desorption, XRD, TEM, H$_{2}$ -TPR, and XPS to explore the texture properties, morphology, and electronic environment of vanadium. In addition, several vanadium catalysts were also prepared by the incipient wetness impregnation (IWI) …
Ranolazine-Functionalized Cuo Nps: Efficient Homogeneous And Heterogeneouscatalysts For Reduction Of 4-Nitrophenol, Gul Naz Laghari Baloch, Sarfaraz Ahmed Mahesar, Sirajuddin Khan, Jan Nisar, Syed Tufail Hussain Sherazi
Ranolazine-Functionalized Cuo Nps: Efficient Homogeneous And Heterogeneouscatalysts For Reduction Of 4-Nitrophenol, Gul Naz Laghari Baloch, Sarfaraz Ahmed Mahesar, Sirajuddin Khan, Jan Nisar, Syed Tufail Hussain Sherazi
Turkish Journal of Chemistry
In the present study copper oxide nanoparticles (CuO NPs) were synthesized using a hydrothermal method with ranolazine as a shape-directing agent. Ranolazine-functionalized CuO NPs were characterized by various analytical techniques such as scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). The SEM pattern confirmed the morphology of ranolazine-functionalized CuO NPs with well-defined rice-like structures. FTIR spectroscopy confirmed the interaction between CuO NPs and ranolazine. The XRD analysis indicated that the structure of ranolazine-functionalized CuO NPs was monoclinic crystalline and the size ranged between 9 and 18 nm with an average particle size of 12 nm. …
Highly Improved Electrocatalytic Oxidation Of Dimethylamine Borane On Silvernanoparticles Modified Polymer Composite Electrode, Çağri Ceylan Koçak, Süleyman Koçak, Şükri̇ye Karabi̇beroğlu, Zekerya Dursun
Highly Improved Electrocatalytic Oxidation Of Dimethylamine Borane On Silvernanoparticles Modified Polymer Composite Electrode, Çağri Ceylan Koçak, Süleyman Koçak, Şükri̇ye Karabi̇beroğlu, Zekerya Dursun
Turkish Journal of Chemistry
Dimethylamine borane (DMAB) is a promising fuel alternative for fuel cell applications. In this work cyclic voltammetric behavior of DMAB was investigated on the polymerized aminophenol film decorated with Ag nanoparticles in alkaline media. The polymer film was formed on the glassy carbon electrode by electrochemical technique and then, the surface was modified with Ag nanoparticles. The surface of the modified electrode was identified by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy techniques. The developed electrode has displayed high electrocatalytic activity for DMAB oxidation in alkaline media depending on the supporting electrolyte concentration. Experimental …
Entrapment Of Organic Fluorophores In Calcium Phosphate Nanoparticles Withslow Release, Laila Sadallah, Aicha Boukhriss, Hassan Hannache, Said Gmouh
Entrapment Of Organic Fluorophores In Calcium Phosphate Nanoparticles Withslow Release, Laila Sadallah, Aicha Boukhriss, Hassan Hannache, Said Gmouh
Turkish Journal of Chemistry
Two organic fluorophores, fluorescein (F) and rhodamine B (Rd), were entrapped in calcium phosphate nanoparticles. The as-obtained nanoparticles can be used for biological release applications. For this aim, calcium phosphate nanoparticles were synthesized using the precipitation method. Structural analysis of these nanoparticles was performed using XRD, FTIR, and Raman spectroscopy, confirming that the synthesized nanoparticles were hydroxyapatite. TEM and SEM analyses demonstrated that these nanoparticles had a size of 20 nm and a well-defined morphology. F and Rd (about 0.5 wt.%) were entrapped in these nanoparticles and their release, as a function of time, was studied via UV-Vis spectroscopy. The …
Blue Dye Degradation In An Aqueous Medium By A Combined Photocatalytic Andbacterial Biodegradation Process, Gabriela Perez Osorio, Flor Del Rocio Hernandez Gomez, Janette Arriola Morales, Maribel Castillo Morales, Jose Carlos Mendoza Hernandez
Blue Dye Degradation In An Aqueous Medium By A Combined Photocatalytic Andbacterial Biodegradation Process, Gabriela Perez Osorio, Flor Del Rocio Hernandez Gomez, Janette Arriola Morales, Maribel Castillo Morales, Jose Carlos Mendoza Hernandez
Turkish Journal of Chemistry
This paper aimed at implementing a treatment system for polluted water with textile dyes, starting with a photocatalytic decomposition process using sunlight as a source of energy and continuing with a bacterial biodegradation process, in order to reach degradation percentages higher than those obtained using only one of the processes mentioned above. When water treatment with the dye in the combined system was over, an acute ecotoxicity test was performed to make sure that toxic metabolites were not produced due to biodegradation. Solophenyl Blue azoic dye, and Erionyl Blue and Terasil Blue anthraquinone dye-colored solutions were treated with the Pd/Al$_{80}$ …
Synthesis, Cytotoxic Assessment, And Molecular Docking Studies Of2,6-Diaryl-Substituted Pyridine And 3,4- Dihydropyrimidine-2(1h)-One Scaffolds, Zahra Hosseinzadeh, Nima Razzaghi-Asl, Ali Ramazani, Hamideh Aghahosseini, Ali Ramazani
Synthesis, Cytotoxic Assessment, And Molecular Docking Studies Of2,6-Diaryl-Substituted Pyridine And 3,4- Dihydropyrimidine-2(1h)-One Scaffolds, Zahra Hosseinzadeh, Nima Razzaghi-Asl, Ali Ramazani, Hamideh Aghahosseini, Ali Ramazani
Turkish Journal of Chemistry
Cancer is one of the main global health problems. In order to develop novel antitumor agents, we synthesized 3,4-dihydropyrimidine-2(1H)-one (DHPM) and 2,6-diaryl-substituted pyridine derivatives as potential antitumor structures and evaluated their cytotoxic effects against several cancer cell lines. An easy and convenient method is reported for the synthesis of these derivatives, employing cobalt ferrite (CoFe$_{2}$ O$_{4}$ @SiO$_{2}$ -SO$_{3}$ H) magnetic nanoparticles under microwave irradiation and solvent-free conditions. The structural characteristics of the prepared nanocatalyst were investigated by FTIR, XRD, SEM, and TGA techniques. In vitro cytotoxic effects of the synthesized products were assessed against the human breast adenocarcinoma cell line …
Effect Of Surfactant Types On Particle Size And Morphology Of Flame-Retardantzinc Borate Powder, Yeli̇z İpek
Effect Of Surfactant Types On Particle Size And Morphology Of Flame-Retardantzinc Borate Powder, Yeli̇z İpek
Turkish Journal of Chemistry
Zinc borate is a boron-containing chemical material that is used to increase the flame retardancy of polymeric materials, dyes, cables, fabrics, carpets, and the internal parts of automobiles and planes. Commercially used zinc borate, which has the formula of 2ZnO· 3B$_{2}$ O$_{3}$· 7H$_{2}$ O, has a particle size between 10 and 20 μm. However, recent studies have shown that nanosized flame retardants have more superior flame retardancy and less negative effects on mechanical properties than microsized flame retardants. Nanosized flame retardants disperse more homogeneously and even low quantities are sufficient to provide high flame resistance. In this study, nano zinc …
Development Of Thermoplastic Polyurethane/Polyaniline-Doped Membranes Forthe Separation Of Glycine Through Electrodialysis, Khurram ., Asif Ali Qaiser, Rashid Saleem, Naveed Shahzad Ali, Shahbaz Nazir, Tousif Hussain, Abdul Ghaffar
Development Of Thermoplastic Polyurethane/Polyaniline-Doped Membranes Forthe Separation Of Glycine Through Electrodialysis, Khurram ., Asif Ali Qaiser, Rashid Saleem, Naveed Shahzad Ali, Shahbaz Nazir, Tousif Hussain, Abdul Ghaffar
Turkish Journal of Chemistry
Recently, membrane-based separation processes, particularly electrodialysis, have attracted attention for the separation and purification of organic and amino acids from animal feedstock waste. In this study, cation exchange membranes were synthesized by making a composite of thermoplastic polyurethane and polyaniline (PANI) via the doping of various aromatic sulfonic acids, such as ß -naphthol sulfonic acid and phenol sulfonic acid. The PANI was prepared using a standard method, which was further used in the composite blending at varying concentrations of 10%- 20%. The impact of the concentration of PANI and the nature of the dopant on the membrane characteristics were comparatively …
Synthesis, Spectroscopic Studies, And Antioxidant Activities Of Novelthio/Carbohydrazones And Bis-Isatin Derivatives From Terephthalaldehyde, Hali̇t Muğlu, Hasan Yakan, Temel Kan Bakir
Synthesis, Spectroscopic Studies, And Antioxidant Activities Of Novelthio/Carbohydrazones And Bis-Isatin Derivatives From Terephthalaldehyde, Hali̇t Muğlu, Hasan Yakan, Temel Kan Bakir
Turkish Journal of Chemistry
New bis(isatins-thio/carbohydrazones) based on Schiff bases were prepared from terephthalaldehyde biscarbohydrazone and 5-substituted isatins in the presence of a drop of sulfuric acid under reflux in ethanol. Terephthalaldehyde bis(thio/carbohydrazone) was synthesized by the reaction of (thio)/carbohydrazide and terephthalaldehyde in the presence of a few drops of acetic acid under reflux in ethanol. The structures of these synthesized compounds were determined using IR, $^{1}$H NMR, and $^{13}$C NMR spectroscopy and elemental analysis. The in vitro antioxidant activity of all the compounds was determined by the 1,1-diphenyl-2-picryl hydrazyl (DPPH.) free radical scavenging method. Compound 2 showed the best antioxidant activity.
Bet, Ftir, And Raman Characterizations Of Activated Carbon From Waste Oil Fly Ash, Rizwan Ali, Zaheer Aslam, Reyad A. Shawabkeh, Anam Asghar, Ibnelwaleed A. Hussein
Bet, Ftir, And Raman Characterizations Of Activated Carbon From Waste Oil Fly Ash, Rizwan Ali, Zaheer Aslam, Reyad A. Shawabkeh, Anam Asghar, Ibnelwaleed A. Hussein
Turkish Journal of Chemistry
Activated carbon (AC), a porous material with high pore volume, attracts increasing attention owing to its potential applications in several fields. The development of a porous structure in AC marginally relies on both the treatment methods and the type of precursor. Thus far, both renewable and nonrenewable precursor sources have been used to synthesize AC with high surface area and pore volume. This study presents the synthesis of AC via physicochemical treatment of waste oil fly ash (OFA), a waste material produced from power plants. The aim was to produce AC by adding surface pores and surface functional groups to …
Synthesis And Bioactivities Of 1-(4-Hydroxyphenyl)-2-((Heteroaryl)Thio)Ethanones As Carbonic Anhydrase I, Ii And Acetylcholinesterase Inhibitors, Cem Yamali, Hali̇se İnci̇ Gül, Yeli̇z Demi̇r, Cavi̇t Kazaz, İlhami̇ Gülçi̇n
Synthesis And Bioactivities Of 1-(4-Hydroxyphenyl)-2-((Heteroaryl)Thio)Ethanones As Carbonic Anhydrase I, Ii And Acetylcholinesterase Inhibitors, Cem Yamali, Hali̇se İnci̇ Gül, Yeli̇z Demi̇r, Cavi̇t Kazaz, İlhami̇ Gülçi̇n
Turkish Journal of Chemistry
The discovery of enzyme targeting inhibitors is a popular area of drug research. Biological activities of the compounds bearing phenol and heteroaryl groups make them popular groups in drug design targeting important enzymes such as acetylcholinesterase (AChE, E.C.3.1.1.7) and carbonic anhydrases (CAs, EC 4.2.1.1). 1-(4-hydroxyphenyl)-2-((aryl)thio)ethanones as possible AChE and CAs inhibitors were synthesized, and their chemical structures were confirmed by IR, $^{1}$H NMR, $^{13}$C NMR, and HRMS. The compounds 2 and 4 were found potent AChE inhibitors with the Ki values of 22.13 ± 1.96 nM and 23.71 ± 2.95 nM, respectively, while the compounds 2 (Ki $=$ 8.61 ± …
Synthesis, Biological Evaluation Of Antioxidant-Antibacterial Activities And Computational Studies Of Novel Anthracene- And Pyrene-Based Schiff Base Derivatives, Ayşegül Gümüş, Veysi̇ Okumuş, Selçuk Gümüş
Synthesis, Biological Evaluation Of Antioxidant-Antibacterial Activities And Computational Studies Of Novel Anthracene- And Pyrene-Based Schiff Base Derivatives, Ayşegül Gümüş, Veysi̇ Okumuş, Selçuk Gümüş
Turkish Journal of Chemistry
Schiff base derivatives with anthracene- and pyrene-based units, A1-A6 and P1-P6 were synthesized (89%-99% yields). Schiff base derivatives were designed to possess an heterocyclic moiety on one side to enhance the coordination ability towards metals. To investigate the biological assay of the newly synthesized compounds, their DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging, metal chelating, reducing power, antibacterial and DNA binding activities were tested. A6 (63.1%) showed the maximum free radical scavenging activity among all. However, compound P3 at concentration of 200 \textmu g/mL possessed the highest metal chelating (45.8%) activity and power of reduction. In addition, P3 and A6 showed antibacterial activity …
Magnetite Nanoparticles-Based Hydroxyl Radical Scavenging Activity Assay Ofantioxidants Using N, N-Dimethyl-P-Phenylenediamine Probe, Zi̇ya Can, Büşra Keski̇n, Ayşem Arda, Erol Erçağ, Mustafa Reşat Apak
Magnetite Nanoparticles-Based Hydroxyl Radical Scavenging Activity Assay Ofantioxidants Using N, N-Dimethyl-P-Phenylenediamine Probe, Zi̇ya Can, Büşra Keski̇n, Ayşem Arda, Erol Erçağ, Mustafa Reşat Apak
Turkish Journal of Chemistry
Excessive amounts of reactive oxygen species (ROS), unless counterbalanced by antioxidants, can cause cellular damage under oxidative stress conditions; therefore, antioxidative defenses against ROS must be measured. With the development of nanotechnology, nanoparticles have found numerous applications in science, health, and industries. Magnetite nanoparticles (Fe$_{3}$O$_{4}$:MNPs) have attracted attention because of their peroxidase-like activity. In this study, hydroxyl radicals (?OH) generated by MNPs-catalyzed degradation of H$_{2}$O$_{2}$ converted the N,N-dimethyl-p-phenylenediamine (DMPD) probe into its colored DMPD$^{•+}$ radical cation, which gave an absorbance maximum at λ = 553 nm. In the presence of antioxidants, $^{•}$OH was partly scavenged by antioxidants and produced less …
Synthesis, Characterization And Evaluation Of Antidengue Activity Of Enantiomeric Schiffbases Derived From S-Substituted Dithiocarbazate, Maqsood Maryam, Sang Loon Tan, Karen Ann Crouse, Mohamed Ibrahim Mohamed Tahir, Hui Yee Chee
Synthesis, Characterization And Evaluation Of Antidengue Activity Of Enantiomeric Schiffbases Derived From S-Substituted Dithiocarbazate, Maqsood Maryam, Sang Loon Tan, Karen Ann Crouse, Mohamed Ibrahim Mohamed Tahir, Hui Yee Chee
Turkish Journal of Chemistry
A series of Schiff bases have been successfully synthesized through the acid-catalyzed condensation of S-substituted dithiocarbazates and three enantiomerically pure monoterpenes, (1R)-(+)-camphor, (1S)-(-)-camphor, (1R)-(-)-camphorquinone, (1S)- (+)-camphorquinone, (R)-(-)-carvone and (S)-(+)-carvone. Spectroscopic results revealed that the Schiff bases containing camphor or carvone likely adopted an E-configuration along the characteristic imine bond while those containing camphorquinone assumed a Z-configuration. The antidengue potential of these compounds was evaluated based on DENV 2 caused cytopathic effect (CPE) reduction-based in vitro evaluation. The compounds were validated through secondary foci forming unit reduction assay (FFURA). Compounds were also tested for their cytotoxicity against Vero cells. The compounds …
Preparation Of Different Thin Film Catalysts By Direct Current Magnetron Sputtering Forhydrogen Generation, Gamze Bozkurt, Abdulkadi̇r Özer, Ayşe Bayrakçeken Yurtcan
Preparation Of Different Thin Film Catalysts By Direct Current Magnetron Sputtering Forhydrogen Generation, Gamze Bozkurt, Abdulkadi̇r Özer, Ayşe Bayrakçeken Yurtcan
Turkish Journal of Chemistry
In this study, thin films of Co, Ni, Pd, and Pt were prepared on Co$_{3}$O$_{4}$ support material in pellet form using the direct current (DC) magnetron sputtering method for use as catalysts for hydrogen generation from NaBH4.Characterization of the catalysts was carried out using X-ray diffraction (XRD), scanning electronic microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). According to cross-sectional SEM images, catalyst thicknesses were observed in the range of approximately 115.3-495.8 nm. The particle sizes were approximately 25.0, 21.4, 33.9, and 9.5 nm for Ni-Co$_{3}$O$_{4}$, Co-Co$_{3}$O$_{4}$, Pd-Co$_{3}$O$_{4}$, and Pt-Co$_{3}$O$_{4}$ catalysts, respectively. The increase in NaOH initial concentration provides an increase …