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- Phthalocyanine (10)
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Articles 31 - 60 of 106
Full-Text Articles in Physical Sciences and Mathematics
Antioxidant, Anticholinesterase, And Antimicrobial Activities And Fatty Acid Constituents Of Achillea Cappadocica Hausskn. Et Bornm., Abdulselam Ertaş, Mehmet Boğa, Nesri̇n Haşi̇mi̇, Yeter Yeşi̇l, Ahmet Ceyhan Gören, Gülaçti Topçu, Ufuk Kolak
Antioxidant, Anticholinesterase, And Antimicrobial Activities And Fatty Acid Constituents Of Achillea Cappadocica Hausskn. Et Bornm., Abdulselam Ertaş, Mehmet Boğa, Nesri̇n Haşi̇mi̇, Yeter Yeşi̇l, Ahmet Ceyhan Gören, Gülaçti Topçu, Ufuk Kolak
Turkish Journal of Chemistry
This study was the first fatty acid analysis and biological activity report on an endemic Achillea species, Achillea cappadocica Hausskn. et Bornm. The major compounds in the fatty acid were identified as oleic (34.7 %), palmitic (23.1 %), and linoleic acids (20.6 %). The methanol and water extracts indicated higher ABTS cation radical scavenging activity than that of \alpha-tocopherol and BHT at 100 \mu g/mL. The acetone extract showed 70.62 % inhibitory activity against butyrylcholinesterase at 200 \mu g/mL. The acetone and methanol extracts exhibited moderate antimicrobial activity.
Synthesis Of Novel Imidazo[1,2-A]Pyridines And Evaluation Of Their Antifungal Activities, Füsun Göktaş, Nesri̇n Cesur, Di̇lek Şatana, Meltem Uzun
Synthesis Of Novel Imidazo[1,2-A]Pyridines And Evaluation Of Their Antifungal Activities, Füsun Göktaş, Nesri̇n Cesur, Di̇lek Şatana, Meltem Uzun
Turkish Journal of Chemistry
New 2-(imidazo[1,2-a]pyridin-2-ylcarbonyl)-N-substituted hydrazinecarbothioamides (4a--j), N'-(3-substituted-4-oxo-1,3-thiazolidin-2-ylidene)imidazo[1,2-a]pyridine-2-carbohydrazides (5a--f), and N-(nonsubstituted/4-substituted phenyl)-5-(imidazo[1,2-a]pyridine-2-yl)-1,3,4-oxadiazole-2-amines (6a--d) were synthesized from imidazo[1,2-a]pyridine-2-carbohydrazide (3) and evaluated for antifungal activity against Microsporum gypseum NCPF 580, M. canis, Trichophyton tonsurans NCPF 245, T. rubrum, Candida albicans ATCC 10231, and C. parapsilosis ATCC 22019 using amphotericin B as the standard. The chemical structures of the compounds were confirmed by elemental analysis, IR, ^1H NMR, ^{13}C NMR, HMBC (^{13}C, ^1H), and mass spectra. Most of the tested compounds showed moderate antifungal activity. Hydrazinecarbothioamide derivatives 4h and 4f exhibited the highest activity against M. canis (MIC: 2 \mu g mL^{-1} and 4 \mu g …
Oxidation Of Hydrocarbons With Tetra-N-Butylammonium Peroxy Monosulfate Catalyzed By \Beta-Tetrabromo-Meso-Tetrakis(4-Methoxyphenyl)- And \Beta-Tetrabromo-Meso-Tetraphenylporphyrinatomanganese(Iii), Saeed Rayati, Saeed Zakavi, Hossein Valinejad
Oxidation Of Hydrocarbons With Tetra-N-Butylammonium Peroxy Monosulfate Catalyzed By \Beta-Tetrabromo-Meso-Tetrakis(4-Methoxyphenyl)- And \Beta-Tetrabromo-Meso-Tetraphenylporphyrinatomanganese(Iii), Saeed Rayati, Saeed Zakavi, Hossein Valinejad
Turkish Journal of Chemistry
\beta-Tetrabromo-meso-tetrakis(4-methoxyphenyl)porphyrin, H_2T(4-OCH_3P)PBr_4, was synthesized and characterized by UV-Vis and ^1H NMR spectroscopy. Oxidation of alkanes and olefins with tetra-n-butylammonium peroxymonosulfate (n-Bu_4NHSO_5) was studied in the presence of MnT(4-OCH_3P)PBr_4(OAc) and MnTPPPBr_4(OAc) (TPP = meso-tetraphenylporphyrin). While significance differences were observed between the catalytic activities of the title complexes in the oxidation of alkanes, the 2 manganese porphyrins showed comparable activities in oxidation of most of the olefins used. However, the latter showed greater catalytic performance in the oxidation of the hydrocarbons. Moreover, the oxidative degradation of the former (60 %) was greater than that of the latter (45 %) in the oxidation …
Organic Biomolecules Bind To Phosphate Through Borate Linkages In Aqueous Solutions, Nazi̇k Aydoğmuş, Dursun Ali̇ Köse, Michael Andrew Beckett, Bi̇rgül Karan
Organic Biomolecules Bind To Phosphate Through Borate Linkages In Aqueous Solutions, Nazi̇k Aydoğmuş, Dursun Ali̇ Köse, Michael Andrew Beckett, Bi̇rgül Karan
Turkish Journal of Chemistry
Solutions of salicyclic, ascorbic, and citric acids were reacted with boric acid, followed by NaH_2PO_4. The products, triphosphateborate ester of salicylic acid (1), orthosphateborate ester of ascorbic acid (2), triphosphateborate ester of ascorbic acid (3), and orthosphateborate ester of citric acid (4), were flash precipitated with cold acetone and characterised by microanalysis, thermal analysis, FT-IR, Raman, ^{11}B NMR, ^{31}P MAS NMR, and mass spectroscopic techniques. Analytical results indicated the presence of --C--O--B--O--P-- linkages with the attached phosphate groups varying between orthophosphate and triphosphate, depending on the starting material. The biomolecules studied in this work may serve as models in the …
Convenient Synthesis Of New Polysubstituted Isoindole-1,3-Dione Analogues, Ayşe Tan, Mustafa Zahri̇tti̇n Kazancioğlu, Derya Aktaş, Özlem Gündoğdu, Ertan Şahi̇n, Nurhan Ki̇shali, Yunus Kara
Convenient Synthesis Of New Polysubstituted Isoindole-1,3-Dione Analogues, Ayşe Tan, Mustafa Zahri̇tti̇n Kazancioğlu, Derya Aktaş, Özlem Gündoğdu, Ertan Şahi̇n, Nurhan Ki̇shali, Yunus Kara
Turkish Journal of Chemistry
Three new polysubstituted isoindole-1,3-diones were prepared from 2-ethyl-5-hydroxy-3a,4,5,7a-tetrahydro-isoindole-1,3-dione. The reaction of 2-ethyl-5-hydroxy-3a,4,5,7a-tetrahydro-isoindole-1,3-dione with m-CPBA gave the corresponding epoxide. The triacetate derivative was obtained via cis-hydroxylation using OsO_4, followed by acetylation. An aromatic derivative, a secondary reaction product, was also formed during the acetylation. Finally, a tricyclic derivative from 2-ethyl-5-hydroxy-3a,4,5,7a-tetrahydro-isoindole-1,3-dione was synthesized via dichloroketene addition under microwave irradiation. The exact structures of epoxide and tricyclic derivatives were determined by X-ray diffraction analysis.
Synthesis And Characterization Of A Novel 3-Amino-1,2,4-Triazole Lead(Ii) Coordination Polymer, Şebnem Esen Sözerli̇, Arzu Özen, İbrahi̇m Kani̇, Deni̇z Demi̇r
Synthesis And Characterization Of A Novel 3-Amino-1,2,4-Triazole Lead(Ii) Coordination Polymer, Şebnem Esen Sözerli̇, Arzu Özen, İbrahi̇m Kani̇, Deni̇z Demi̇r
Turkish Journal of Chemistry
A novel [Pb_2(\mu-atrz)_2(\mu-CH_3COO)(CH_3COO)]_n (atrz = 3-amino-1,2,4-triazole) complex was synthesized and characterized by IR spectroscopy, thermogravimetric analysis, and single crystal X-ray diffraction. The molecular structure shows that the complex is a coordination polymer in which there are 2 different lead(II) ions with coordination number of 5, Pb(2), and, with a coordination number of 4, Pb(1). Each atrz acts as a bridging ligand between 2 Pb(II) ions through the 2 adjacent nitrogen atoms of the triazole ring. The acetate anions show different types of coordination mode: one acts as a bridge by coordination of the same oxygen atom with Pb(II) ions and …
Aqueous Dabco, An Efficient Medium For Rapid Organocatalyzed Knoevenagel Condensation And The Gewald Reaction, Mohammad Saeed Abaee, Somayeh Cheraghi
Aqueous Dabco, An Efficient Medium For Rapid Organocatalyzed Knoevenagel Condensation And The Gewald Reaction, Mohammad Saeed Abaee, Somayeh Cheraghi
Turkish Journal of Chemistry
In the presence of water and 1,4-diazabicyclo[2.2.2]octane, several aldehydes and cyclic ketones underwent efficient Knoevenagel condensation with malononitrile and ethyl cyanoacetate to produce the respective \alpha.\beta-unsaturated systems within fairly short time periods. As a result, high yields of conjugated products were easily obtained. Products could be engaged in a Gewald reaction, either stepwise or in situ, to produce efficiently their respective 2-aminothiophenes within 4--7 h.
N-Heterocyclic Carbene (Nhc) Palladium(Ii) Complexes Bearing Chiral Oxazoline Ligands And Their Catalytic Activities In Allylic Alkylation Reactions, Serpi̇l Deni̇zalti, Hayati̇ Türkmen, Beki̇r Çeti̇nkaya
N-Heterocyclic Carbene (Nhc) Palladium(Ii) Complexes Bearing Chiral Oxazoline Ligands And Their Catalytic Activities In Allylic Alkylation Reactions, Serpi̇l Deni̇zalti, Hayati̇ Türkmen, Beki̇r Çeti̇nkaya
Turkish Journal of Chemistry
NHC--Pd(II) complexes bearing a chiral oxazoline ligand (IIIa--f) were synthesized by cleavage of dimeric palladium complexes with the oxazoline ligand. They were fully characterized by ^1H and ^{13}C NMR and elemental analyses. The catalytic activity of the complexes (IIIa--f) in allylic alkylation reactions was evaluated. The complex IIIa was found to be the most active catalyst. Very low ee values indicate that the oxazoline is dissociated from the active catalytic species.
Linear Assembly And 3d Networks Of Peptide Modified Gold Nanoparticles, Şaban Kalay, Clement Blanchet, Mustafa Çulha
Linear Assembly And 3d Networks Of Peptide Modified Gold Nanoparticles, Şaban Kalay, Clement Blanchet, Mustafa Çulha
Turkish Journal of Chemistry
The charge and size of molecules chemically attached to nanoparticles (NPs) play an important role in their interaction behavior in suspensions. Gold nanoparticles (AuNPs) were modified systematically with peptides and the modification was verified with surface-enhanced Raman scattering (SERS). The behavior of the modified AuNPs in suspension and at the liquid--solid interface was monitored using small angle X-ray scattering (SAXS), UV/Vis spectroscopy and dynamic light scattering (DLS) in suspension, and atomic force microscopy (AFM) at the solid--liquid interface. It was found that while negatively charged peptide modified AuNPs behave very similar to citrate reduced AuNPs due to their negatively charged …
Effects Of Functional Groups Of Triple Bonds Containing Molecules On Nickel Electroplating, Esma Sezer, Belkiz Ustamehmetoğlu, Ramazan Katirci
Effects Of Functional Groups Of Triple Bonds Containing Molecules On Nickel Electroplating, Esma Sezer, Belkiz Ustamehmetoğlu, Ramazan Katirci
Turkish Journal of Chemistry
The effects of propargyl alcohol (PA), propynol ethoxylate (PME), propargyl sulfonate (PS), and diethylaminopropyne (DEP) compounds as additives in a Watts bath on coating brightness, thickness, and efficiency were investigated and compared using electrochemical methods such as linear and square wave voltammetry (SWV), chronoamperometry, chronopotentiometry, electrochemical impedance (EIS), and X-ray fluorescence (XRF) spectroscopy. The charge transfer resistance values obtained in the presence of PA and PME were similar and higher than the other values obtained; this result suggests that PA and PME have better adsorption. The optic and XRF measurements revealed that for the PS molecule the plating is the …
Simultaneous Determination Of Dexpanthenol, Lidocaine Hydrochloride, And Mepyramine Maleate In Combined Pharmaceutical Gel By Capillary Electrophoresis, Gülden Akyil, Hayri̇ye Eda Şatana Kara, Sezen Yarimkaya Baş, Nusret Ertaş, Ni̇lgün Günden Göğer
Simultaneous Determination Of Dexpanthenol, Lidocaine Hydrochloride, And Mepyramine Maleate In Combined Pharmaceutical Gel By Capillary Electrophoresis, Gülden Akyil, Hayri̇ye Eda Şatana Kara, Sezen Yarimkaya Baş, Nusret Ertaş, Ni̇lgün Günden Göğer
Turkish Journal of Chemistry
A new capillary electrophoresis method was developed for the simultaneous determination of dexpanthenol (DEX), lidocaine (LID), and mepyramine (MEP) in pharmaceutical preparations. The best results were obtained using 20 mM (pH 3.0) phosphate buffer as the background electrolyte. Separation was obtained using a fused-silica capillary (75 \mu m internal diameter, 50 cm total length, 41 cm effective length) and a potential of +30 kV at 20 °C. Standards and samples were injected using a pressure injection at 50 mbar for 5 s and the analytes were monitored at a detection wavelength of 200 nm. Under optimum conditions, migration times were …
Synthesis And Characterization Of Magnesium Borate Minerals Of Admontite And Mcallisterite Obtained Via Ultrasonic Mixing Of Magnesium Oxide And Various Sources Of Boron: A Novel Method, Azmi̇ Seyhun Kipçak, Emek Moroydor Derun, Sabri̇ye Pi̇şki̇n
Synthesis And Characterization Of Magnesium Borate Minerals Of Admontite And Mcallisterite Obtained Via Ultrasonic Mixing Of Magnesium Oxide And Various Sources Of Boron: A Novel Method, Azmi̇ Seyhun Kipçak, Emek Moroydor Derun, Sabri̇ye Pi̇şki̇n
Turkish Journal of Chemistry
Magnesium borates can be used as detergent compounds or hydrocarbon catalyzers and in the ceramics industry for superconductor material manufacture owing to their high elastic coefficient and resistance to corrosion at high temperatures. In the present study, the synthesis of magnesium borate was facilitated via a novel ultrasonic method of mixing and the identification and characterization of the material were carried out via X-Ray diffraction (XRD), Fourier transform infrared (FT-IR), and Raman spectroscopies, and the B_2O_3 content was determined through titration. The surface morphology was investigated using scanning electron microscopy (SEM). The results of the XRD analysis identified the synthesized …
Ultrarapid Catalytic Reduction Of Some Dyes By Reusable Novel Erythromycin-Derived Silver Nanoparticles, Yasmeen Junejo, Abdulhadi̇ Baykal
Ultrarapid Catalytic Reduction Of Some Dyes By Reusable Novel Erythromycin-Derived Silver Nanoparticles, Yasmeen Junejo, Abdulhadi̇ Baykal
Turkish Journal of Chemistry
A novel green approach for the synthesis of silver nanoparticles using erythromycin as a reducing/capping agent is presented. Erythromycin-derived silver nanoparticles were characterized by ultraviolet-visible spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy, X-ray powder diffraction, and Fourier transform infrared spectroscopy. Monodispersed silver nanoparticles showed excellent and promising catalytic activity for reduction of 3 differently charged dyes (eosin B, methylene blue, and rose bengal) in the presence of NaBH_4. The study revealed that 100% reduction of these dyes can be achieved efficiently in just 150--250 s. They were easily recovered from the reaction medium and were reused 5 times, …
The Effects Of Ionic Strength And Temperature On The Dissociation Constants Of Adefovir And Cidofovir Used As Antiviral Drugs, Hasan Atabey, Hayati̇ Sari
The Effects Of Ionic Strength And Temperature On The Dissociation Constants Of Adefovir And Cidofovir Used As Antiviral Drugs, Hasan Atabey, Hayati̇ Sari
Turkish Journal of Chemistry
The effects of ionic strength and temperature on the dissociation constants of adefovir (PMEA) and cidofovir (HPMPC) used as antiviral drugs were studied at 298 K, 308 K, and 318 K in aqueous media and at different ionic strength backgrounds of NaCl potentiometrically. The dissociation constants of the ligands were determined via the calculation of the titration data with the SUPERQUAD computer program. The thermodynamic parameters (\Delta G, \Delta H, and \Delta S) for all species were calculated. The dissociation order of nitrogen and oxygen atoms in the ligands according to proton affinities values were obtained using PM6 semiempirical methods. …
Study On Transportation Of Phenol Through A Nanotubule Membrane, Yue Liu, Li Xie, Xiaoxue Fan, Dingyan Fan, Shasheng Huang
Study On Transportation Of Phenol Through A Nanotubule Membrane, Yue Liu, Li Xie, Xiaoxue Fan, Dingyan Fan, Shasheng Huang
Turkish Journal of Chemistry
Gold nanochannels were prepared by plating electrolessly gold within the pores of polycarbonate filter membranes (PCTMs). These PCTMs with cylindrical Au nanotubules of uniform radius and high density can be used as a convenient model system to investigate the mechanism of particle transport through nanotubules. The transport properties of phenol through a modified Au nanotubule membrane were studied. The permeate flux of phenol transport through the nanotubule membrane can be spatially and temporally manipulated by controlling the magnitude and direction of the current applied across the separation cell, and the electroosmotic flow (EOF) was investigated by measuring the flux of …
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, …
Calixcephems: Clustered Cephalosporins Analogous To Calixpenams As Novel Potential Anti-Mrsa Agents, Fazel Nasuhi Pur, Karim Akbari Dilmaghani
Calixcephems: Clustered Cephalosporins Analogous To Calixpenams As Novel Potential Anti-Mrsa Agents, Fazel Nasuhi Pur, Karim Akbari Dilmaghani
Turkish Journal of Chemistry
Two novel clusters of cephalosporin based on calixarene were synthesized directly or by ring expansion of the penicillin arms of calixpenams to the corresponding cephem arms via sulfoxide intermediates. Antibiotic tests showed that calixcephems have a noteworthy increase in antibacterial activity against methicillin-resistant strains of Staphylococcus aureus (MRSA) with respect to parent calixpenams and their corresponding single cephems.
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.
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 …
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.
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.
Encapsulation Of Phthalocyanine-C_{60} Fullerene Conjugates Into Metallosupramolecular Subphthalocyanine Capsules: A Turn Of The Screw, Irene Sanchez-Molina, Mine Ince, Giovanni Bottari, Christian Georges Claessens, Maia Victoria Martinez Diaz, Tomas Torres
Encapsulation Of Phthalocyanine-C_{60} Fullerene Conjugates Into Metallosupramolecular Subphthalocyanine Capsules: A Turn Of The Screw, Irene Sanchez-Molina, Mine Ince, Giovanni Bottari, Christian Georges Claessens, Maia Victoria Martinez Diaz, Tomas Torres
Turkish Journal of Chemistry
In this communication, encapsulation studies between metallosupramolecular capsule 1, formed by 2 subphthalocyanines (SubPcs) coordinated to 3 metallic centers, and phthalocyanine (Pc)-C_{60} fullerene conjugates 2--5 have been carried out. It was shown that the encapsulation of the C_{60} moiety by the SubPc cage occurred exclusively for dyads 2--4, whereas it was not observed in the case of triad 5. The rigidity of the linker between the Pc and the fullerene unit proved to have an important impact in the complex formation. Complex formation was tested in 2 different solvents, where the importance of solvophobic effects was highlighted. The resulting multicomponent …
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.
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 …
Microwave-Assisted Synthesis Of Novel Nonperipherally Substituted Metallophthalocyanines Bearing (7-(Trifluoromethyl)Quinolin-4-Yl)Oxy Groups, Di̇dem Evren, Hacer Yasemi̇n Yeni̇lmez, Ayfer Kalkan Burat
Microwave-Assisted Synthesis Of Novel Nonperipherally Substituted Metallophthalocyanines Bearing (7-(Trifluoromethyl)Quinolin-4-Yl)Oxy Groups, Di̇dem Evren, Hacer Yasemi̇n Yeni̇lmez, Ayfer Kalkan Burat
Turkish Journal of Chemistry
The synthesis, characterization, and spectroscopic properties of novel nonperipherally tetrasubstituted metallophthalocyanines (zinc, cobalt, copper, manganese, and indium) bearing 4 (7-(trifluoromethyl)quinolin-4-yl)oxy units has been reported. The new compounds have been characterized using UV-Vis, IR, ^1H NMR, ^{13}C NMR, ^{19}F NMR, and mass spectroscopic data. The absorption properties of these new complexes were compared to those of peripherally substituted phthalocyanine derivatives. Based on the structural, spectroscopic, and absorption studies, it was found that the substitution effect altered the electronic structures significantly. The results provide useful information to understand the effect of peripheral or nonperipheral substitution on the properties of this macrocyclic ring. …
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.
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.