Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Phthalocyanine (10)
- 1 (6)
- Phthalocyanines (4)
- Singlet oxygen (4)
- Synthesis (4)
-
- Fluorescence (3)
- Oxidation (3)
- 2 (2)
- 3 (2)
- 4-oxadiazole (2)
- Acyl phosphonates (2)
- Adsorption (2)
- Aggregation (2)
- Antimicrobial activities (2)
- Azo dye (2)
- Boric acid (2)
- Calixarene (2)
- Calixpenam (2)
- DFT (2)
- Electrochemistry (2)
- Enzyme inhibition (2)
- Extraction (2)
- Fluorescence quenching (2)
- Methylene blue (2)
- Microwave (2)
- Microwave irradiation (2)
- Molecular docking (2)
- Photodynamic therapy (2)
- Preconcentration (2)
- Pyrimidine (2)
Articles 31 - 60 of 106
Full-Text Articles in Physical Sciences and Mathematics
Green Synthesis Of Fe_3o_4 Nanoparticles By One-Pot Saccharide-Assisted Hydrothermal Method, Ayşe Demi̇r, Abdulhadi̇ Baykal, Hüseyi̇n Sözeri̇
Green Synthesis Of Fe_3o_4 Nanoparticles By One-Pot Saccharide-Assisted Hydrothermal Method, Ayşe Demi̇r, Abdulhadi̇ Baykal, Hüseyi̇n Sözeri̇
Turkish Journal of Chemistry
A saccharide-assisted hydrothermal route starting from a single iron precursor was employed to study the influence of reducing saccharides on the formation of iron oxide (Fe_3O_4) nanoparticles (NPs). Fe_3O_4 NPs, which were confirmed by X-ray diffraction analysis, were successfully synthesized by a hydrothermal method in which mannose, maltose, lactose, and galactose served as reducing agents. The formation of Fe_3O_4 NPs was also confirmed by Fourier transform infrared spectroscopy. Samples exhibited different crystallite sizes estimated based on line profile fitting as 12 \pm 2, 9 \pm 2, 13 \pm 3, and 9 \pm 3 nm for mannose, maltose, lactose, and galactose, …
Graphite Oxide As An Efficient Solid Reagent For Esterification Reactions, Maryam Mirzaaghayan, Rabah Boukherroub, Mahshid Rahimifard
Graphite Oxide As An Efficient Solid Reagent For Esterification Reactions, Maryam Mirzaaghayan, Rabah Boukherroub, Mahshid Rahimifard
Turkish Journal of Chemistry
Esterification of organic acids with alcohols under mild conditions in high yields using graphite oxide, a readily available and inexpensive material, as an effective reagent is described.
Synthesis Of Tertiary Propargylic Phosphonates By Addition Of Trialkynylaluminum Reagents To Acyl Phosphonates And Investigation Of Their Antimicrobial Activities, Muhammed Shakhawoat Hossain, Sidika Polat Çakir, Ayşe Betül Karaduman, Mustafa Yamaç, Ayhan Sitki Demi̇r
Synthesis Of Tertiary Propargylic Phosphonates By Addition Of Trialkynylaluminum Reagents To Acyl Phosphonates And Investigation Of Their Antimicrobial Activities, Muhammed Shakhawoat Hossain, Sidika Polat Çakir, Ayşe Betül Karaduman, Mustafa Yamaç, Ayhan Sitki Demi̇r
Turkish Journal of Chemistry
A series of propargylic alcohols containing phosphonates was synthesized by addition reactions of tris-(propynyl) and tris-(phenylethynyl)aluminum reagents to acyl phosphonates in good yields. Aromatic moieties of the acyl phosphonates with electron-withdrawing groups generally resulted in better isolated chemical yield. Selected propargylic phosphonates were tested for antimicrobial activities. Compounds 3a and 3h showed noticeable antifungal activity, especially against molds.
Rosmarinic Acid: A Potent Carbonic Anhydrase Isoenzymes Inhibitor, Meryem Topal, İlhami̇ Gülçi̇n
Rosmarinic Acid: A Potent Carbonic Anhydrase Isoenzymes Inhibitor, Meryem Topal, İlhami̇ Gülçi̇n
Turkish Journal of Chemistry
Rosmarinic acid is a water-soluble ester of caffeic acid and 3,4-dihydroxyphenyllactic acids, and is mainly found in plant species including Boraginaceae and Lamiaceae. In this research, we determined the inhibition property of rosmarinic acid on carbonic anhydrase isoenzymes I and II (hCA I and II) purified from human erythrocytes by using Sepharose-4B affinity column chromatography. hCA I and II isoenzymes were obtained with a yield of 57.9% and 67.2% and 76.5- and 509.3-fold purification of each isoenzyme, respectively. In order to show the purity of the isoenzymes, SDS-PAGE was performed and one band was observed. In vitro inhibition of both …
Effect Of The Anchoring Group In Porphyrin Sensitizers: Phosphonate Versus Carboxylate Linkages, Christine Stern, Alla Bessmertnykh Lemeune, Yulia Gorbunova, Aslan Tsivadze, Roger Guilard
Effect Of The Anchoring Group In Porphyrin Sensitizers: Phosphonate Versus Carboxylate Linkages, Christine Stern, Alla Bessmertnykh Lemeune, Yulia Gorbunova, Aslan Tsivadze, Roger Guilard
Turkish Journal of Chemistry
Porphyrins are an important family of organic chromophores that have attracted attention as photosensitizers in TiO_2-based dye-sensitized solar cells (DSSCs). This brief review is dedicated to comparative studies of phosphonic and carboxylic acid anchoring groups for attachment of porphyrin sensitizers on semiconductors or conductors surface. Here we have selected some representative examples of recently described phosphonate/carboxylate porphyrins with the aim to demonstrate that porphyrin phosphonate should be a promising anchoring group for such systems.
Electrochemistry Of Fe(Iv) And Mn(Iv) Corroles Containing Meso-Dichlorophenyl Substituents And The Use Of These Compounds As Catalysts For The Electroreduction Of Dioxygen In Acid Media, Lina Ye, Zhongping Ou, Deying Meng, Mingzhu Yuan, Yuanyuan Fang, Karl M. Kadish
Electrochemistry Of Fe(Iv) And Mn(Iv) Corroles Containing Meso-Dichlorophenyl Substituents And The Use Of These Compounds As Catalysts For The Electroreduction Of Dioxygen In Acid Media, Lina Ye, Zhongping Ou, Deying Meng, Mingzhu Yuan, Yuanyuan Fang, Karl M. Kadish
Turkish Journal of Chemistry
Two meso-dichlorophenyl substituted metallocorroles were synthesized and characterized as to their electrochemical and spectroelectrochemical properties in dichloromethane, benzonitrile, and pyridine containing 0.1 M tetra-n-butylammonium perchlorate (TBAP) as supporting electrolyte. The examined compounds are represented as (Cl_2Ph)_3CorFe^{IV}Cl and (Cl_2Ph)_3CorMn^{IV}Cl where (Cl_2Ph)_3Cor is the trianion of 5,10,15-tri(2,4-dichlorophenyl)corrole. Each metallocorrole was examined as to its catalytic activity for the electoreduction of dioxygen when coated on an edge-plane pyrolytic graphite electrode in 1.0 M HClO_4. Cyclic voltammetry combined with linear sweep voltammetry at a rotating disk electrode (RDE) and a rotating ring disk electrode (RRDE) was utilized to evaluate the catalytic activity for the …
History, Development, And A New Concept Of Phthalocyanines In Turkey, Özer Bekaroğlu
History, Development, And A New Concept Of Phthalocyanines In Turkey, Özer Bekaroğlu
Turkish Journal of Chemistry
This paper reviews the history of phthalocyanines in Turkey. Phthalocyanines are chemical compounds that were accidently discovered nearly a century ago. The relevant research and articles have grown dramatically in Turkey since our first paper on them containing four [15]crown[5] published in 1986. The ball-type phthalocyanines were produced and published as a new concept in phthalocyanine chemistry for the first time by our group in Turkey in 2006. Unfortunately, with the exception of our work on this subject, almost no papers have been published in Turkey or in other countries since then. We strongly urge scientists to consider working on …
Td-Dft Calculations And Mcd Spectroscopy Of Porphyrin And Phthalocyanine Analogues: Rational Design Of Photosensitizers For Pdt And Nir Region Sensor Applications, John Mack, Martijn Wildervanck, Tebello Nyokong
Td-Dft Calculations And Mcd Spectroscopy Of Porphyrin And Phthalocyanine Analogues: Rational Design Of Photosensitizers For Pdt And Nir Region Sensor Applications, John Mack, Martijn Wildervanck, Tebello Nyokong
Turkish Journal of Chemistry
Geometry optimizations and TD-DFT calculations have been carried out on series of fused-ring-expanded phthalonitriles, phthalocyanines, and aza-dipyrromethene boron difluoride (aza-BODIPY) dyes and trends in their optical and redox properties have been analyzed. The potential utility of fused-ring-expanded phthalocyanine and aza-BODIPY analogues for photodynamic therapy and near infrared region sensor applications is assessed on this basis. Recent attempts to prepare fused-ring-expanded aza-BODIPY analogues with benzene, pyrazine, and naphthalene rings have demonstrated that the properties of aza-BODIPYs vary markedly when different fused ring systems are added to the \beta-carbons of the pyrrole rings. A comparison of the TD-DFT calculations demonstrates that, as …
Nature Of Second-Order Nonlinear Optical Response In Phthalocyanine Derivatives: A Density Functional Theory Study, Chiming Wang, Chao Chen, Qingqi Zhang, Dongdong Qi, Jianzhuang Jiang
Nature Of Second-Order Nonlinear Optical Response In Phthalocyanine Derivatives: A Density Functional Theory Study, Chiming Wang, Chao Chen, Qingqi Zhang, Dongdong Qi, Jianzhuang Jiang
Turkish Journal of Chemistry
Density functional theory was employed to investigate a series of phthalocyanine derivatives, discovering the limitation when the expansion of the conjugated system was employed to improve the hyper-Rayleigh scattering response coefficient. Furthermore, an unusually C_{\infty v}-type octupolar population was found by electrostatic potential analysis. In addition, the dynamic and static hyper-Rayleigh scattering responses (\beta_{HRS}) were simulated using the coupled perturbed density functional theory, showing an increasing dynamic \beta_{HRS} value along with an increase in incident light energy.
Synthesis And Electrochemical And Spectroelectrochemical Characterization Of Chloromanganese(Iii) Phthalocyanines, Mukaddes Özçeşmeci̇, Ilgin Nar, Esi̇n Hamuryudan
Synthesis And Electrochemical And Spectroelectrochemical Characterization Of Chloromanganese(Iii) Phthalocyanines, Mukaddes Özçeşmeci̇, Ilgin Nar, Esi̇n Hamuryudan
Turkish Journal of Chemistry
The synthesis of novel, symmetrical, tetrasubstituted manganese phthalocyanine complexes bearing 4 hexylthio, 2',3',4',5',6'-pentafluorobenzyloxy, 2',3',5',6'-tetrafluoro-4'-hexylthio-benzyloxy, and 2',3',5',6'-tetrafluoro-4'-pentoxy-benzyloxy units is reported. The new compounds have been characterized by using elemental analyses and UV-Vis, FT-IR, and mass spectroscopic data. The electrochemical properties of the manganese phthalocyanine complexes were investigated by cyclic and square wave voltammetry and the nature of the observed redox processes was studied by spectroelectrochemistry.
N-Bridged Dimers Of Tetrapyrroles Complexed By Transition Metals: Syntheses, Characterization Methods, And Uses As Oxidation Catalysts, Ümi̇t İşci̇, Fabienne Dumoulin, Alexander B. Soroki̇n, Vefa Ahsen
N-Bridged Dimers Of Tetrapyrroles Complexed By Transition Metals: Syntheses, Characterization Methods, And Uses As Oxidation Catalysts, Ümi̇t İşci̇, Fabienne Dumoulin, Alexander B. Soroki̇n, Vefa Ahsen
Turkish Journal of Chemistry
N-bridged dimers of tetrapyrroles complexed by transition metals have been known for nearly four decades, and gained renewed attention when their powerful oxidation properties were recently evidenced. This article is a state of the art review of the reported complexes and of their synthetic methods. Beyond classical chemistry characterization tools, specific methods appropriate to their structure are used and are presented in detail. Finally, their uses and importance of oxidation catalysts are reviewed.
Novel Metal-Free And Metallophthalocyanines Containing Four 21-Membered Pentathiadiaza Macrocycles: Synthesis, Characterization, And Study Of Aggregation Properties, Hali̇l Zeki̇ Gök, Berna Farsak, Hülya Keleş, Mustafa Keleş
Novel Metal-Free And Metallophthalocyanines Containing Four 21-Membered Pentathiadiaza Macrocycles: Synthesis, Characterization, And Study Of Aggregation Properties, Hali̇l Zeki̇ Gök, Berna Farsak, Hülya Keleş, Mustafa Keleş
Turkish Journal of Chemistry
Metal-free phthalocyanine 3 and its metallophthalocyanine derivatives 4, 5, and 6 (M = Zn, Co, and Ni) substituted with four 21-membered pentathiadiaza macrocycles were synthesized and their structures identified by elemental analysis, IR, ^1H NMR, mass, and UV-Vis spectroscopy techniques. The aggregation properties of phthalocyanines 4, 5, and 6 were investigated in different solvents and at different concentrations of dimethylformamide.
Coupling Ferrocene To Brominated Tetraazaporphyrin: Exploring An Alternative Synthetic Pathway For Preparation Of Ferrocene-Containing Tetraazaporphyrins, Victor N. Nemykin, Elena A. Makarova, Nathan R. Erickson, Pavlo V. Solntsev
Coupling Ferrocene To Brominated Tetraazaporphyrin: Exploring An Alternative Synthetic Pathway For Preparation Of Ferrocene-Containing Tetraazaporphyrins, Victor N. Nemykin, Elena A. Makarova, Nathan R. Erickson, Pavlo V. Solntsev
Turkish Journal of Chemistry
A Castro--Stephens coupling reaction between metal-free 3(2),8(7)-dibromo- 2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and (ferrocenylethynyl)copper resulted in the formation of copper 2(3),7(8),12(13), 17(18)-tetra-tert-butyl-3(2), 8(7)-di(ferrocenylethynyl)-5,10,15,20-tetraazaporphyrin and copper 2(3),7(8),12(13),17(18)-tetra-tert-butyl-3(2)-ferrocenylethynyl-5, 10,15,20-tetraazaporphyrin, which were separated in the form of 2 positional isomers along with copper 3(2)-bromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and copper 2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin. A similar reaction with metal-free 3(2),8(7),13(12), 18(17)-tetrabromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin resulted in only a trace amount of 3(2),8(7),13(12)-tribromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-18(17) -ferrocenylethynyl-5,10,15,20-tetraazaporphyrin, while no products with larger number of organometallic substituents were observed. Direct coupling between ferrocenelithium and 3(2),8(7)-dibromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin resulted in a debromination reaction accompanied by very minor dimerization of the tetraazaporphyrin core, which was explained based on the steric properties of the parent tetraazaporphyrin. The …
Diphenylethoxy-Substituted Metal-Free And Metallophthalocyanines As Potential Photosensitizer For Photodynamic Therapy: Synthesis And Photophysical And Photochemical Properties, Yusuf Yilmaz, Ali̇ Erdoğmuş, Muhammet Kasim Şener
Diphenylethoxy-Substituted Metal-Free And Metallophthalocyanines As Potential Photosensitizer For Photodynamic Therapy: Synthesis And Photophysical And Photochemical Properties, Yusuf Yilmaz, Ali̇ Erdoğmuş, Muhammet Kasim Şener
Turkish Journal of Chemistry
The synthesis of a 4-(2,2-diphenylethoxy)phthalonitrile (1) and its organosoluble free base (2), zinc(II) (3), nickel(II) (4), and cobalt(II) (5) phthalocyanine derivatives is presented in this work. The novel complexes were characterized by elemental analyses and spectral data such as infrared, nuclear magnetic resonance, ultraviolet visible, and mass data. General tendencies were described for photophysics (fluorescence) and photochemistry (photodegradation and singlet oxygen quantum yields) of the free base and zinc(II) phthalocyanine derivatives in dimethylformamide. The quantum yield values of fluorescence (\Phi_F), singlet oxygen formation (\Phi_{\Delta}), and photodegradation (\Phi_d) for the zinc phthalocyanine were found to be 0.37, 0.48, and 9.12 \times …
Synthesis And Properties Of Novel Polymeric Metal-Free And Metallophthalocyanines Containing Peripherally Long 1,2-Bis[(3-Oxapropyl)Oxa]Benzene Derivatives, Ahmet Bi̇lgi̇n, Durmuş Yanmaz, Çi̇ğdem Yağci
Synthesis And Properties Of Novel Polymeric Metal-Free And Metallophthalocyanines Containing Peripherally Long 1,2-Bis[(3-Oxapropyl)Oxa]Benzene Derivatives, Ahmet Bi̇lgi̇n, Durmuş Yanmaz, Çi̇ğdem Yağci
Turkish Journal of Chemistry
New polymeric phthalocyanine moieties (M = 2H, Zn, Ni, Cu, and Co) were synthesized via polytetracyclomerization reaction of o-bis[3-(3,4-dicyanophenoxy)propyloxy]benzene (3), which can be obtained by the reaction of 4-nitrophthalonitrile with o-bis[(3-hydroxypropyl)oxy]benzene. Aggregation and disaggregation behavior of the polymeric phthalocyanine (5) was studied with some alkali and earth alkali metal cations. Measured intrinsic viscosities of the polymeric phthalocyanines exhibited a substantial decreasing tendency with dilution of the solution. Thermogravimetric analysis was performed under air by using DSC and DTG/TGA techniques and indicated that these polymers have good thermal stability. AC and DC electrical conductivities of the polymeric phthalocyanines were investigated in …
Microwave-Assisted Synthesis And Characterization Of Co(Ii) Phthalocyanine And Investigation Of Its Catalytic Activity On 4-Nitrophenol Oxidation, Ece Tuğba Saka, Zekeri̇ya Biyiklioğlu, Hali̇t Kanteki̇n
Microwave-Assisted Synthesis And Characterization Of Co(Ii) Phthalocyanine And Investigation Of Its Catalytic Activity On 4-Nitrophenol Oxidation, Ece Tuğba Saka, Zekeri̇ya Biyiklioğlu, Hali̇t Kanteki̇n
Turkish Journal of Chemistry
In this study, new cobalt phthalocyanine containing a 2-(2-benzothiazolylthio)ethoxy group at peripheral positions has been synthesized and characterized by spectroscopic methods (IR, UV-Vis elemental analysis, and mass spectroscopies). Catalytic activity of Co(II) phthalocyanine has been investigated in the presence of oxidants such as tert-buthylhydroperoxide, m-chloroperoxybenzoic acid, and H_2O_2. Co(II) phthalocyanine shows catalytically activity and product conversion under mild conditions. To find the optimal conditions in the oxidation process, substrate ratio, oxidant ratio, temperature, and oxidant type were examined over 3 h. The results exhibit the best optimum reaction conditions in this catalytic system.
New Soluble Amidoamine Substituted Phthalocyanines: Synthesis, Characterization, And Investigation Of Their Solution Properties, Senem Çolak, Sali̇h Zeki̇ Yildiz
New Soluble Amidoamine Substituted Phthalocyanines: Synthesis, Characterization, And Investigation Of Their Solution Properties, Senem Çolak, Sali̇h Zeki̇ Yildiz
Turkish Journal of Chemistry
The synthesis of tetraaminopropylamid substituted phthalocyanines was targeted to prepare enhanced soluble phthalocyanines in common solvents from hydrophobic to hydrophilic that bore nonionic groups on their periphery. Metal-free (H_2Pc) and metallophthalocyanines (Zn(II) (ZnPc), Cu(II) (CuPc) and Co(II) (CoPc)) were prepared and characterized by UV-Vis, FT-IR, and mass spectroscopies. The ^1H NMR spectra were recorded for the diamagnetic phthalocyanine species H_2Pc and ZnPc. The phthalocyanines showed sufficient solubility in common organic solvents such as dimethyl sulfoxide, tetrahydrofuran, and ethanol. However, methanol was not a good solvent for CuPc and H_2Pc. Solubility and aggregation studies of H_2Pc and ZnPc were performed in …
Synthesis And Characterization Of Novel 2-{[2-(Dimethylamino)Ethyl](Methyl)Amino} Ethoxy-Substituted Metallophthalocyanines, Hi̇lal Zengi̇n, Hacer Yasemi̇n Yeni̇lmez, Ayfer Kalkan Burat, Zehra Altuntaş Bayir
Synthesis And Characterization Of Novel 2-{[2-(Dimethylamino)Ethyl](Methyl)Amino} Ethoxy-Substituted Metallophthalocyanines, Hi̇lal Zengi̇n, Hacer Yasemi̇n Yeni̇lmez, Ayfer Kalkan Burat, Zehra Altuntaş Bayir
Turkish Journal of Chemistry
The synthesis of novel, symmetrical, tetrasubstituted metallophthalocyanines (cobalt, zinc, and copper) bearing four 2-{[2-(dimethylamino)ethyl](methyl)amino} ethoxy units was reported. The dinitrile derivative was converted into the water-soluble quaternized product by its reaction with methyl iodide. The quaternized zinc phthalocyanine was obtained from the reaction of the water-soluble dinitrile derivative with zinc acetate. The structures of the newly synthesized molecules were proposed according to elemental analysis, ^1H NMR, FT-IR, and UV-Vis spectral data.
Water-Soluble Phthalocyanines Containing Azo Dye; Microwave-Assisted Synthesis And Photochemical Properties Of Znpcs, Ci̇han Kantar, Emrah Ataci, Selami̇ Şaşmaz
Water-Soluble Phthalocyanines Containing Azo Dye; Microwave-Assisted Synthesis And Photochemical Properties Of Znpcs, Ci̇han Kantar, Emrah Ataci, Selami̇ Şaşmaz
Turkish Journal of Chemistry
Novel water-soluble metallophthalocyanines (M: Co, Ni, Cu, Zn) containing azo dye were characterized. The structures were confirmed by IR, UV/vis, ^1H NMR, ^{13}C NMR, mass spectroscopy, and elemental analysis. Photochemical properties and aggregation behavior of zinc phthalocyanines were investigated. Singlet oxygen quantum yields of the zinc phthalocyanines (2d, 3d, 5d, and 6d) were 0.8, 0.57, 0.71, and 0.46, respectively.
Synthesis And Characterization Of Tetra-Substituted Titanium(Iv) Phthalocyanines With Axial Ligand, Deni̇z Kutlu Tarakci, İlke Gürol
Synthesis And Characterization Of Tetra-Substituted Titanium(Iv) Phthalocyanines With Axial Ligand, Deni̇z Kutlu Tarakci, İlke Gürol
Turkish Journal of Chemistry
In this paper, the synthesis and characterization of peripheral tetra-2-(2-ethyloxyethyloxy)ethyloxy substituted oxo-titanium phthalocyanines (TiOPcs) are reported. The reaction of 2,2,3,3-tetrafluoropropoxy substituted and [2-(2-ethoxyethoxy)ethoxy] substituted TiOPcs (1 and 3) with 4-[(6-hydroxyhexyl)oxy]benzene-1,2-diol as a strongly chelating oxygen donor ligand is described. Compounds 1a and 3a bearing the hydroxyl group as an axial ligand of the bulky group are converted into a thiol group (1c and 3c). The new compounds are characterized by elemental analysis, FT-IR, ^1H NMR, and mass spectrometry. While the fluoropropoxy substituted TiOPc has good solubility in polar solvents such as acetone and THF, the other TiOPc is soluble in …
Synthesis Of Novel Triazoles Bearing 1,2,4-Oxadiazole And Phenylsulfonyl Groups By 1,3-Dipolar Cycloaddition Of Some Organic Azides And Their Biological Activities, Yaşar Dürüst, Hamza Karakuş, Muhsi̇ne Zeynep Yavuz, Ali̇ Akçahan Gepdi̇remen
Synthesis Of Novel Triazoles Bearing 1,2,4-Oxadiazole And Phenylsulfonyl Groups By 1,3-Dipolar Cycloaddition Of Some Organic Azides And Their Biological Activities, Yaşar Dürüst, Hamza Karakuş, Muhsi̇ne Zeynep Yavuz, Ali̇ Akçahan Gepdi̇remen
Turkish Journal of Chemistry
1,3-Dipolar cycloaddition of 5-azidomethyl-3-p-substituted phenyl-1,2,4-oxadiazoles to phenyl vinyl sulfone and bismaleimide gives rise straightforwardly to 1-((3-(p-substituted) phenyl-1,2,4-oxadiazol-5-yl)methyl)-4-(phenylsul\-fonyl)-4,5-dihydro-1H-1,2,3-triazoles and bisdihydropyrrolo[3,4-d][1,2,3]triazole-4,6(3aH,5H)-diones. The structures of the new cycloadducts were elucidated by means of IR, NMR (^1H, ^{13}C, 2D), mass spectra, and physical characteristics (mp and R_f values). In addition, anticancer activities of the cycloadducts against MCF-7 cells were also investigated.
Deposition And Characterization Of Cu_9s_5 Nanocrystals From Unsymmetrical [(Hex)(Me)Nc(S)Nc(O)C_6h_3(No_2)_2-3,5]_2cu(Ii) And [(Et)(Bu)Nc(S)Nc(O)C_6h_4-4-No_2]_2cu(Ii) Complexes By Colloidal Thermolysis Method, Sohail Saeed, Rizwan Hussain
Deposition And Characterization Of Cu_9s_5 Nanocrystals From Unsymmetrical [(Hex)(Me)Nc(S)Nc(O)C_6h_3(No_2)_2-3,5]_2cu(Ii) And [(Et)(Bu)Nc(S)Nc(O)C_6h_4-4-No_2]_2cu(Ii) Complexes By Colloidal Thermolysis Method, Sohail Saeed, Rizwan Hussain
Turkish Journal of Chemistry
Cu_9S_5 nanocrystals were synthesized from unsymmetrical [(Hex)(Me)NC(S)NC(O)C_6H_3(NO_2)_2-3,5]_2Cu(II) and [(Et)(Bu)NC(S)NC(O)C_6H_4-4-NO_2]_2 Cu(II) complexes by colloidal thermolysis in the presence of surfactant oleylamine. The unsymmetrical copper complexes were synthesized by the reaction of copper(II) acetate with N-[hexyl(methyl)carbamothioyl]-3,5-dinitrobenzamide and N-[ethyl(butyl)carbamothioyl]-4-nitrobenzamide. The complexes were used as single-source precursors for the preparation of Cu_9S_5 nanocrsytals. The Cu_9S_5 nanocrystals were characterized by X-ray powder diffraction and transmission electron microscopy.
Azolylimidazoles: Synthetic Strategies And Medicinal Applications, Bakr Fathy Abdelwahab, Rizk Elsayed Khidre
Azolylimidazoles: Synthetic Strategies And Medicinal Applications, Bakr Fathy Abdelwahab, Rizk Elsayed Khidre
Turkish Journal of Chemistry
The current review summarizes the known routes to different azoles linked directly to imidazole. This review is divided into classes based on the type of azoles connected to an imidazole ring. Some medical applications are mentioned.
Hard Chromium Electrodeposition From A Trivalent Chromium Bath Containing Water-Soluble Polymer, Vyacheslav Protsenko, Viktor Gordiienko, Tatiana Butyrina, Elena Vasileva, Felix Danilov
Hard Chromium Electrodeposition From A Trivalent Chromium Bath Containing Water-Soluble Polymer, Vyacheslav Protsenko, Viktor Gordiienko, Tatiana Butyrina, Elena Vasileva, Felix Danilov
Turkish Journal of Chemistry
The effect of polyvinylpyrrolidones (PVPs) with different molecular weights as polymeric additives to a sulfate trivalent chromium bath was ascertained. Introduction of PVPs to the plating bath was stated to result in improvement in the surface appearance of chromium deposits and stabilization of current efficiency value in long-term electrolysis. The rate of metal deposition is practically independent of the deposition time. Thus, using PVP additive allows one to obtain high-quality Cr-coatings with a thickness of several tens of micrometers. It is found by means of turbidimetric analysis that the polymer additive has an accelerating effect on the aggregation of particles …
Nh-Acidities And Hammett Correlation Of 3-Para Substituted Phenyl-1,2,4-Oxadiazol-5(4h)-Ones And 1,2 \Lambda^43,5-Oxathiadiazole 2-Oxides In Nonaqueous Media, Nedi̇me Dürüst, Yaşar Dürüst, Emi̇ne Özge Gözlükaya
Nh-Acidities And Hammett Correlation Of 3-Para Substituted Phenyl-1,2,4-Oxadiazol-5(4h)-Ones And 1,2 \Lambda^43,5-Oxathiadiazole 2-Oxides In Nonaqueous Media, Nedi̇me Dürüst, Yaşar Dürüst, Emi̇ne Özge Gözlükaya
Turkish Journal of Chemistry
NH acidities of some 3-(p-substitutedphenyl)-1,2,4-oxadiazol-5(4H)-ones and 4-(p-substitutedphenyl)-1,2 \lambda^43,5-oxathiadiazole 2-oxides were determined in methanol by means of potentiometric titration with sodium methoxide. pK_a values of the title compounds calculated from the potentiometric data were interpreted on the basis of structural effects caused by para-substituted groups on the phenyl ring by plotting pK_a values versus Hammett \sigma_p^+ constants, which gave excellent linear correlations.
Immobilized Metal Ion Affinity Nanospheres For \Alpha-Amylase Immobilization, Tülden Kalburcu, Müni̇re Nalan Tüzmen, Si̇nan Akgöl, Adi̇l Deni̇zli̇
Immobilized Metal Ion Affinity Nanospheres For \Alpha-Amylase Immobilization, Tülden Kalburcu, Müni̇re Nalan Tüzmen, Si̇nan Akgöl, Adi̇l Deni̇zli̇
Turkish Journal of Chemistry
Immobilized metal chelate affinity chromatography (IMAC) support was practiced for \alpha-amylase immobilization. Poly(hydroxyethylmethacrylate-methacryloylamidotryptophan)-Ni^{2+} [p(HEMA-MAT)-Ni^{2+}] nanospheres, average diameter 100 nm, were produced by surfactant free emulsion polymerization. Characterizations of p(HEMA-MAT)-Ni^{2+} nanospheres were carried out by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM). In addition, average particle size, size distribution, and surface charge were specified. The amount of N-methacryloylamidotryptophan (MAT) incorporated to polymer was determined as 1.95 mmol/g polymers by using nitrogen stoichiometry. The specific surface areas of poly(hydroxyethylmethacrylate) [p(HEMA)] and p(HEMA-MAT) nanospheres were calculated as 1856 m^2/g and 1914 m^2/g, respectively. Protein adsorption increased with increasing initial protein …
Synthesis, Spectral, And Thermoanalytical Studies On The New Heterobimetallic [Mg(Ii)-Ti(Iv)]-\Mu-Oxoisopropoxide And Its \Beta-Diketonates, Rajesh Kumar
Turkish Journal of Chemistry
The new heterobimetallic [Mg(II)-Ti(IV)]-\mu-oxoisopropoxide was synthesized on treatment of magnesium acetate with titanium(IV) isopropoxide in refluxing decalin in 1:2 molar ratio and characterized by liberated isopropanol, elemental, spectral (IR, ^1H and ^{13}C NMR, and mass), thermal analysis, and molecular weight data. The reactions of [Mg(II)-Ti(IV)]-\mu-oxoisopropoxide compound with \beta-diketones in different molar ratios (1:1--1:4) yielded mono to tetra derivatives [{MgO_2Ti_2(OPr^i)_{6-n}L_n}] (where n is 1--4 and L = acetylacetonate/benzoylacetonate anion)] of the \mu-oxo complex and were characterized by elemental, liberated isopropanol, and spectral analysis (IR and ^1H and ^{13}C NMR). These studies revealed interesting facets in support of plausible structures of the …
Selective Catalytic Reduction Of Sulfur Dioxide By Carbon Monoxide Over Iron Oxide Supported On Activated Carbon, Guangjian Wang, Liancheng Bing, Zhijian Yang, Jiankang Zhang
Selective Catalytic Reduction Of Sulfur Dioxide By Carbon Monoxide Over Iron Oxide Supported On Activated Carbon, Guangjian Wang, Liancheng Bing, Zhijian Yang, Jiankang Zhang
Turkish Journal of Chemistry
The selective reduction of sulfur dioxide with carbon monoxide to elemental sulfur was studied over AC-supported transition-metal oxide catalysts. According to the study, Fe_2O_3/AC was the most active catalyst among the 4 AC-supported catalysts tested. By using Fe_2O_3/AC, the best catalyst, when the feed conditions were properly optimized (CO/SO_2 molar ratio = 2:1; sulfidation temperature, 400 °C; Fe content, 20 wt%; GHSV = 7000 mL g^{-1} h^{-1}), 95.43% sulfur dioxide conversion and 86.59% sulfur yield were obtained at the temperature of 350 °C. Catalyst samples were characterized by X-ray powder diffraction in order to relate the phase composition to the …
Synthesis, Structure, And Luminescent Properties Of 2 Novel 5-Chlorhydroxybenzoate-Imidazole Metal-Organic Complexes, Hong Chen, Si Yuan Luo, Xiuling Wu, Yongqian Wang, Bo Hu, Chao Hu, Gang Huang, Qiao Xin Du
Synthesis, Structure, And Luminescent Properties Of 2 Novel 5-Chlorhydroxybenzoate-Imidazole Metal-Organic Complexes, Hong Chen, Si Yuan Luo, Xiuling Wu, Yongqian Wang, Bo Hu, Chao Hu, Gang Huang, Qiao Xin Du
Turkish Journal of Chemistry
Two novel Zn and Cu complexes with 5-chlorhydroxybenzoate and imidazole ligands, C_{41}H_{36}Zn_2N_8O_{13}Cl_4 (1) and C_{26}H_{22}Cl_2Cu_2N_8O_6 (2), were prepared by slow evaporation method. Single crystal X-ray diffraction analysis was used to determine their structures. The purity of the complexes was confirmed by powder X-ray diffraction analysis. In 1 the Zn^{2+} cation is tetracoordinated with 2 nitrogen atoms from 2 imidazoles and 2 oxygen atoms from the 2 carboxyl groups in 5-chlorhydroxybenzoate. In 2 the coordination polyhedrons of Cu^{2+} center can be described as distorted square pyramidal geometry sharing common edges, with an oxygen atom on the top of the pyramid. The …
A New And Simple Dp Polarographic Method For The Determination Of Uric Acid In Serum After Elimination Of The Interference Of Ascorbic Acid And Dopamine, Ali̇ Cengi̇z Çalişkan, Güler Somer
A New And Simple Dp Polarographic Method For The Determination Of Uric Acid In Serum After Elimination Of The Interference Of Ascorbic Acid And Dopamine, Ali̇ Cengi̇z Çalişkan, Güler Somer
Turkish Journal of Chemistry
Determination of trace amounts of uric acid (UA) in serum is of great importance since its level in serum may show disorders in purine metabolism. With this method, trace amounts of UA in blood serum can be determined by a fast and simple procedure using differential pulse polarography (DPP). The limit of detection was estimated to be 2 \times 10^{-7} M (S/N = 3), lower than that given in previous studies. Among the many electrolytes studied, the best electrolyte condition was found to be 0.05 M phosphate buffer, pH 10--12, in 0.1 M KNO_3. The peak for UA appeared at …