Yazar "Cabir, Beyza" seçeneğine göre listele

Listeleniyor 1 - 5 / 5
  • [ X ]
    Öğe
    Computational DFT calculations, photovoltaic properties and synthesis of (2R, 3S)-2, 3, 4-trihydroxybutoxy substituted phthalocyanines
    (Taylor & Francis Inc, 2020) Cabir, Beyza; Yildiko, Umit; Agirtas, Mehmet Salih; Horoz, Sabit
    In this study, 4-((2R, 3S)-2, 3, 4-trihydroxybutoxy) phthalonitrile was synthesized and characterized as starting material. This new starting material reacts with cobalt and copper metal salts to obtain metallophthalocyanine complexes. The electronic absorption of cobalt and copper phthalocyanine compounds in different concentrations of THF was investigated. In addition, the solubility and absorption of the compounds in different solvents were investigated. Density functional theory was also performed to support the relevant experimental results of the synthesized copper and cobalt center atomic compound. The photovoltaic performance of compounds was measured as current density-voltage (J-V).
  • Küçük Resim
    Öğe
    Novel cobalt (II), zinc (II) phthalocyanines bearing discrete substituents: Synthesis, characterization, aggregation behavior, electrochemical properties and antioxidant activity
    (Synthesis and Reactivity in Inorganic, Metal-Organic & Nano Metal Chemistry, 2014) Ağırtaş, Salih; Cabir, Beyza; Dündar, Abdurrahman; Okumuş, Veysi; Ceyhan, Gökhan
    A new phthalonitrile derivative bearing 3,4,5-trimethoxybenzyloxy and chloro-substituents at peripheral position was prepared by a nucleophilic displacement reaction. Cyclotetramerization of phthalonitrile derivative in dimethylsulfoxide (DMSO) gave the metallophthalocyanines. Novel Co(II), Zn(II) phthalocyanines (Pcs) were obtained from the reaction 4-[(3,4,5- trimethoxybenzyloxy]-5-chlorophthalonitrile and metal salts. The novel compounds have been characterized by using elemental analysis, UV-Vis, FTIR, 1H-NMR spectral data. The aggregation behaviors of Co(II), Zn(II) Pcs were also investigated. These metallophthalocyanines do not show any aggregation behavior between 1.2 × 10−5 and 4.0 × 10−6Mconcentration range in DMF. The antioxidant activities of Pcs were investigated antioxidant assays such as free radical scavenging ability of 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and ferrous ion chelating ability. Furthermore, the redox properties of the Pcs complexes were investigated by using cyclic voltammetry.
  • [ X ]
    Öğe
    Novel Cobalt(II), Zinc(II) Phthalocyanines Bearing Discrete Substituents: Synthesis, Characterization, Aggregation Behavior, Electrochemical Properties, and Antioxidant Activity
    (Taylor & Francis Inc, 2014) Agirtas, M. Salih; Cabir, Beyza; Dundar, Abdurrahman; Okumus, Veysi; Ceyhan, Gokhan
    A new phthalonitrile derivative bearing 3,4,5-trimethoxy- benzyloxy and chloro-substituents at peripheral position was prepared by a nucleophilic displacement reaction. Cyclotetramerization of phthalonitrile derivative in dimethylsulfoxide (DMSO) gave the metallophthalocyanines. Novel Co(II), Zn(II) phthalocyanines (Pcs) were obtained from the reaction 4-[(3,4,5-trimethoxybenzyloxy]-5-chlorophthalonitrile and metal salts. The novel compounds have been characterized by using elemental analysis, UV-Vis, FTIR, H-1-NMR spectral data. The aggregation behaviors of Co(II), Zn(II) Pcs were also investigated. These metallophthalocyanines do not show any aggregation behavior between 1.2 x 10(-5) and 4.0 x 10(-6) M concentration range in DMF. The antioxidant activities of Pcs were investigated antioxidant assays such as free radical scavenging ability of 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and ferrous ion chelating ability. Furthermore, the redox properties of the Pcs complexes were investigated by using cyclic voltammetry.
  • [ X ]
    Öğe
    Novel metal (II) phthalocyanines with 3,4,5-trimethoxybenzyloxy-substituents: Synthesis, characterization, aggregation behaviour and antioxidant activity
    (Elsevier Sci Ltd, 2013) Agirtas, M. Salih; Cabir, Beyza; Ozdemir, Sadin
    A new substituted phthalonitrile derivative was prepared by a nucleophilic displacement reaction of 3,4,5-trimethoxybenzyl alcohol with 4-nitrophthalonitrile. Novel metallophthalocyanines IM: Zn (II), Co (II), Ni (II)1 with four peripheral 3,4,5-trimethoxybenzyloxy groups were synthesized by cyclotetramerization of phthalonitrile derivative. These compounds were purified by crystallization and column chromatography. They were characterized by elemental analysis, FTIR, H-1 NMR, C-13 NMR and UV-VIS spectral data. The aggregation investigations carried out in different concentrations indicate that 3,4,5-trimethoxybenzyloxy-substituted phthalocyanine compounds do not have any aggregation behaviour in concentration range of 10(-2)-10(-8) M. The antioxidant activities of phthalocyanines were investigated by in vitro antioxidant assays such as free radical scavenging ability of 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferrous ion chelating ability. The highest DPPH activity and ferrous ion chelating activity were obtained from Tetrakis [(3,4,5-trimethoxybenzyloxy) phthalocyaninato] cobalt and 4-(3,4,5-trimethoxybenzyloxy) phthalonitrile, respectively. 4-(3,4,5-trimethoxybenzyloxy) phthalonitrile was shown to have a fairly ferrous ion chelating activity. (C) 2012 Elsevier Ltd. All rights reserved.
  • Küçük Resim
    Öğe
    Synthesis, Aggregation, Antioxidant and DNA-Binding Properties of Metallophthalocyanines Bearing 5-Tert-butyl-2-hydroxyphenoxy groups
    (Chemistry Select, 2017) Ağırtaş, Salih; Cabir, Beyza; Özdemir, Sadin; Okumuş, Veysi; Aslantaş, Ali
    In this study, the synthesis and characterization of new substituted metallophthalocyanines are described. A new phthalonitrile, 4-(5-tert-butyl-2-hydroxyphenoxy)-5-chlorophthalonitrile (3) was prepared. New compounds were characterized by UV–Vis, IR, 1HNMR, and elemental analysis. The aggregation behavior of the cobalt (II), magnesium (II) and copper (II) phthalocyanines were studied in tetrahydrofuran and in known concentration ranges. The antioxidant activities of compounds were evaluated. Their radical-scavenging capacity, metal chelating activity and reducing power was fully studied. The compound 3 showed 100% chelating activity as EDTA at concentration 50 mg/L. The DNA interaction of copper (II) phthalocyanine compound (6) was studied using UV/Vis titration, gel electrophoresis, cyclic voltammetry. The results indicated that compound 6 interacts with CT-DNA via intercalation binding mode.