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Full-Text Articles in Physical Sciences and Mathematics
Synthesis And Characterization Of New (E)-N'-(Substituted Benzylidene)-2-(3-(2-Methyl)-4-Oxo-3,4-Dihydroquinazolin-2-Ylthio)Acetohydrazides, Aamer Saeed, Shams-Ul Mahmood, Ulrich Flörke
Synthesis And Characterization Of New (E)-N'-(Substituted Benzylidene)-2-(3-(2-Methyl)-4-Oxo-3,4-Dihydroquinazolin-2-Ylthio)Acetohydrazides, Aamer Saeed, Shams-Ul Mahmood, Ulrich Flörke
Turkish Journal of Chemistry
A small library of new azomethine derivatives of 3-aryl-2-thioxo-2,3-dihydroquinazolin-4(1H)-ones was synthesized. The key intermediates 2-thioxo-quinazolinones (3a--e), obtained in 2 steps from the corresponding anilines, were treated with methyl chloroacetate to afford S-substituted esters (4a,d), which were then converted into corresponding acetohydrazides (5a,d). Further, acetohydrazide (5d) was converted to the azomethines derivatives (6a--k) by reacting with a number of suitably substituted benzaldehydes. FTIR, ^1H NMR, ^{13}C NMR, GC-MS, and elemental analyses were used to confirm the assigned structures of the synthesized compounds. Further, compounds 3a, 5, and 6j were also confirmed by X-ray diffraction data.
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 …
The Chemistry Concerned With The Sonochemical-Assisted Synthesis Of Ceo_2/Poly(Amic Acid) Nanocomposites, Shiva Yazdani, Mehdi Hatami, Seyed Mohammad Vahdat
The Chemistry Concerned With The Sonochemical-Assisted Synthesis Of Ceo_2/Poly(Amic Acid) Nanocomposites, Shiva Yazdani, Mehdi Hatami, Seyed Mohammad Vahdat
Turkish Journal of Chemistry
A series of new poly(amic acid) (PAA) surface-modified cerium oxide (CeO_2) nanocomposites were prepared by sonochemical-assisted method. In the first step, treatment of the surface of CeO_2 nanoparticles with hexadecyltrimethoxysilane as a surface modifier was achieved. In the second step, the partially surface-treated nanoparticles were incorporated into PAA by different weight from 4% to 12%. PAA was synthesized by polycondensation reaction of benzophenone tetracarboxylic dianhydride and 3,5-diamino-N-(4-hydroxyphenyl) benzamide in N-methyl-2-pyrrolidone. The chemical structure of PAA was confirmed by ^1H NMR and FTIR spectroscopy. The polymer had an inherent viscosity of 0.38 dL/g. Three PAA/CeO_2 nanocomposite formulations were prepared from the …
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 …