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    Characterization and use of (E)-2-[(6-methoxybenzo[d]thiazol-2-ylimino)methyl]phenol as an anion sensor and a DNA-binding agent
    (Pergamon-Elsevier Science Ltd, 2016) Barare, Belygona; Yıldız, Mustafa; Unver, Hyseyin; Aslan, Kadir
    We report the spectroscopic characterization, DNA binding, and anion sensor properties, of a Schiff base, that is, (E)-2-[(6-methoxybenzo[d]thiazol-2-ylimino)methyl]phenol from the reaction of 2-hydroxyben-zaldehyde with 2-amino-6-methoxybenzothiazole. Colorimetric measurements revealed that the title compound was sensitive to F-, AcO-, CN-, and OH- anions. Fluorescence measurements demonstrated that the title compound can be used to detect CN-. The interactions between the receptor and anions were confirmed using H-1 NMR titration method. The UV-Vis spectroscopy studies of the interactions between the compound and calf thymus DNA (CT-DNA) revealed intercalative binding of CT-DNA to the title compound. (C) 2015 Elsevier Ltd. All rights reserved.
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    Öğe
    N-Benzoyl-S-(undecyl)-dithiocarbamate: Synthesis, characterization, X-ray single crystal structure, thermal behavior and computational studies
    (Elsevier, 2020) Aydin, Fatma; Arslan, N. Burcu; Aslan, Kadir
    A new dithiocarbamate molecule, named as N-benzoyl-S-(undecyl)-dithiocarbamate (C19H29NOS2), was synthesized and characterized by (HNMR)-H-1, (CNMR)-C-13, FT-IR spectroscopic methods. X-ray analysis of the crystal structure of title compound showed the presence of triclinic space group with a = 4.2417 (8) angstrom, b = 20.010 (4) angstrom, c = 27.959 (6) angstrom, Z = 4, V = 2338.9 angstrom(3). Detailed investigation of molecular packing of the molecule indicated the presence of intermolecular hydrogen bond between C1-H1 center dot center dot center dot S4(i) and C24 -H24 center dot center dot center dot S2(v) that generates R-2(2) (10) motifs, and intermolecular hydrogen bonds between N1-H111 center dot center dot center dot S4(ii) and N2-H222 center dot center dot center dot S2(iv) atoms that forms R-2(2) (7) rings. Thermal properties of the title compound were investigated by thermogravimetric analysis (DTA/TG) and differential scanning calorimetry (DSC). Molecular electrostatic potential (MEP), the HOMO and LUMO energies and thermodynamic parameters of the title compound were calculated using density functional theory (DFT) with B3LYP/6-311G (d,p) level. (C) 2019 Published by Elsevier B.V.
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    Öğe
    Synthesis, characterization and applications of (E)-3- ((5-bromo-2-hydroxy-3-methoxycyclohexa-1,3-dienyl) methyleneamino)-6-(hydroxymethyl)-tetrahydro-2hpyran-2,4,5-triol
    (Open Access House of Science and Technology, 2016) Tadesse, Solomon; Alpaslan, Yelda Bingöl; Yıldız, Mustafa; Ünver, Hüseyin; Aslan, Kadir
    We present the synthesis, characterization, biological and sensing applications of a Schiff base, (E)- 3-((5-bromo-2-hydroxy-3-methoxycyclohexa-1, 3-dienyl)methyleneamino)-6-(hydroxymethyl)- tetrahydro-2H-pyran-2,4,5-triol. Characterization of the title compound was carried out using theoretical quantum-mechanical calculations and experimental spectroscopic methods. The molecular structure of the title compound was confirmed using NMR and FTIR, which was in good agreement with the structure predicted by the theoretical calculations. The title compound was evaluated for its ability to detect anions in DMSO and on a solid surface and for its antimicrobial activity against several common microorganisms. © 2016 Solomon Tadesse, Yelda Bingöl Alpaslan, Mustafa Yildiz, Hüseyin ünver and Kadir Aslan.
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    Öğe
    Synthesis, characterization, theoretical calculations, DNA binding and colorimetric anion sensing applications of 1-[(E)-[(6-methoxy-1,3-benzothiazol-2-yl)imino]methyl]naphthalen-2-ol
    (Elsevier Science Sa, 2015) Barare, Belygona; Yıldız, Mustafa; Alpaslan, Gokhan; Dilek, Nefise; Unver, Fluseyin; Tadesse, Solomon; Aslan, Kadir
    We report the synthesis of a Schiff base 1-(E)-[(6-methoxy-1,3-benzothiazol-2-yl)imino]methyl] naphthalen-2-ol from the reaction of 2-hydroxy-1-naphtaldehyde with 2-amino-6-methoxybenzothiazole. The molecular structure of the title compound was experimentally determined using X-ray single-crystal data and was compared to the structure predicted by theoretical calculations using density functional theory (DFT). In addition, nonlinear optical (NLO) effects of the title compound was predicted using DFT. The colorimetric response of the title compound in DMSO to the addition of equivalent amount of anions (F-, CN-, H2PO4-, OH-, Br-, I-, SCN-, ClO4-, HSO4- N-3(-) and AcO-) was investigated. In this regard, while the addition of F-, CN-, H2PO4-, OH-, and AcO- anions into the solution containing the title compound resulted in a significant color change, the addition of Br-, I-, SCN-, ClO4-, HSO4- and N-3(-) anions resulted in no color change. The most discernable color change in the title compound was caused by CN-, which demonstrated that the title compound can be used to selectively detect CN-. The order of anion-binding power of the title compound was determined to be OH- > CN- > F- similar to AcO- > H2PO4-. The interactions between the receptor and anions were investigated using H-1 NMR titration method. Theoretical and UV-VIS spectroscopy studies of the interactions between the title compound and calf thymus DNA (CT-DNA) showed that the title compound interacts with CT-DNA via intercalative binding. (C) 2015 Elsevier B.V. All rights reserved.