Yazar "Subasi, Elif" seçeneğine göre listele

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    Photochemical reactions of [M(CO)5THF] (M: Cr, Mo and W) with tetradentate Schiff-bases
    (Taylor & Francis Inc, 2008) Karahan, Senem; Koese, Pelin; Subasi, Elif; Temel, Hamdi
    The new complexes, [(mu-CO)(2)Cr-2(eta(4)-H2L)(2)], 1; [(mu-CO)M-2(CO)(2)(eta(4)- H2L)(2)], [M=Mo; 2, W; 3]; [(mu-CO)(2)Cr-2(eta(4)-H2L')(2)], 4 and [(mu-CO)M-2(CO)(2)(eta(4)-H2L')(2)], [M=Mo; 5, W; 6] have been synthesized by the photochemical reactions of photogenerated intermediate, M(CO)(5)THF (M=Cr, Mo, W) with two oxygen and nitrogen donor Schiff base ligands, N,N'-bis(2-hydroxynaphtalin-1-carbaldehydene)-1,2-bis(p-aminophenoxy)ethane (H2L) and N,N'-bis(2-hydroxynaphtalin-1-carbaldehydene)-1,4-bis(p-aminophenoxy)butane (H2L'). The complexes have been characterized by elemental analyses, LC-mass spectrometry, magnetic studies, FTIR and H-1-NMR spectroscopy. The spectroscopic studies show that H2L and H2L' ligands are coordinated to the central metal as tetradentate ligands coordinating via their imine N and O donor atoms in (1-6).
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    Öğe
    Photochemical reactions of [M(CO)5THF] (M: Cr, Mo, and W) with tetradentate Schiff-bases
    (Taylor & Francis Inc, 2008) Karahan, Senem; Kose, Pelin; Subasi, Elif; Temel, Hamdi
    The new complexes, [(mu-CO)(2)Cr-2(4-H2L)(2)], 1; [(mu-CO)M-2(CO)(2)(eta(4)-H2L)(2)], [M = Mo; 2, W; 3]; [(mu-CO)(2)Cr-2(eta(4)-H2L')(2)], 4, and [(mu-CO)M-2(CO)(2)(eta(4)-H2L')(2)], [M = Mo; 5, W; 6] have been synthesized by the photochemical reactions of photogenerated intermediate, M(CO)(5)THF (M = Cr, Mo, W) with two oxygen and nitrogen donor Schiff base ligands, N,N'-bis(2-hydroxynaphtalin-1-carbaldehydene)-1,2-bis(p-aminophenoxy)ethane (H2L) and N,N'-bis(2-hydroxynaphtalin-1-carbalde-hydene)-1,4-bis(p-aminophenoxy)butane (H2L'). The complexes have been characterized by elemental analyses, LC-mass spectrometry, magnetic studies, FTIR, and H-1-NMR spectroscopy. The spectroscopic studies show that H2L and H2L' ligands are coordinated to the central metal as tetradentate ligands coordinating via their imine N and O donor atoms in (1-6).
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    Öğe
    Photochemical reactions of M(CO)5THF (M = Cr, Mo, W) with thio Schiff bases
    (Springer, 2008) Karahan, Senem; Kose, Pelin; Subasi, Elif; Alp, Huseyin; Temel, Hamdi
    The hitherto unknown complexes, [M-2(CO)(6)-(mu-CO)(mu-L)], [M = Cr; 1, Mo; 2, W; 3] and [M-2(CO)(6)-(mu-CO)(mu-L ')], [M = Cr; 4, Mo; 5, W; 6] have been synthesized by the photochemical reactions of photogenerated intermediate, M(CO)(5)THF (M = Cr, Mo, W) with thio Schiff base ligands, N,N '-bis(2-aminothiophenol)-1,4-bis(2-carboxaldehydephenoxy)butane (H2L) and N,N '-bis(2-aminothiophenol)- 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane (H2L '). The complexes have been characterized by elemental analysis, LC-mass spectrometry, magnetic studies, FT-IR and H-1 NMR spectroscopy. The spectroscopic studies show that H2L and H2L ' ligands are converted to benzothiazole derivatives, L and L ' after UV irradiation and coordinated to the central metal as bridging ligands via the central azomethine nitrogen and sulphur atoms in 1-6.
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    Öğe
    Photochemical reactions of metal carbonyls [M(CO)6 (M=Cr, Mo, W)] with N,N?-bis(salicylidene)-1,2-bis-(o-aminophenoxy)ethane
    (Taylor & Francis Ltd, 2006) Subasi, Elif; Temel, Hamdi; Senturk, Ozan S.; Ugur, Fadime
    The complexes [M(CO)(4)(eta(2)-H2L)][M Cr; 1, Mo; 2, W; 3] have been synthesized by photochemical reactions of VIB metal carbonyls [M(CO)(6)] [M Cr, Mo, W] with N, N'-bis(salicylidene)-1,2-bis-(o-aminophenoxy) ethane (H2L) in THF and characterized by elemental analyses, FTIR, (HNMR)-H-1 and mass spectra. The H2L ligand is coordinated to the central metal as a bidentate ligand via the central azomethine nitrogen atoms in 1-3.
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    Photochemical reactions of VIB and VIIB group metal carbonyl complexes with a chiral Schiff base
    (Taylor & Francis Inc, 2007) Subasi, Elif; Temel, Hamdi
    The hitherto unknown complexes, [M(CO)(4)(eta(2)-H2L)], [M = Cr; 1, Mo; 2, W; 3]; fac-[Re(CO)(3)Br(eta(2)-H2L)], 4 and [(eta(5)-C5H5)Mn(CO)Br(eta(2)-H2L)], 5 have been synthesized by the photochemical reactions of VIB and VIIB metal carbonyls [M(CO)(6)] [M = Cr, Mo, W], Re(CO)(5)Br and (eta(5)-C5H5) Mn(CO)(3) with chiral Schiff base N,N'-bis-(2-hydroxynaphthalene-1-carbaldehydene)-(1R,2R)-(-)-diaminocyclohexane (H2L) in THF and characterized by elemental analyses, FTIR, H-1-NMR and mass spectra. The spectroscopic studies show that H2L ligand is coordinated to the central metal as a bidentate ligand coordinating via its imine nitrogens (C=N) in 1-5.
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    Ruthenium (II) complexes of thiosemicarbazone: Synthesis, biosensor applications and evaluation as antimicrobial agents
    (Elsevier Science Bv, 2014) Yildirim, Hatice; Guler, Emine; Yavuz, Murat; Ozturk, Nurdan; Yaman, Pelin Kose; Subasi, Elif; Sahin, Elif
    A conformationally rigid half-sandwich organoruthenium (II) complex [(eta(6)-p-cymene)RuClTSCN-S]Cl, (1) and carbonyl complex [Ru(CO)Cl(PPh3)(2)TSCN-S] (2) have been synthesized from the reaction of [{(eta(6)-p-cymene) RuCl}(2)(mu-Cl)(2)] and [Ru(H)(Cl)(CO)(PPh3)(3)] with thiophene-2-carboxaldehyde thiosemicarbazon (TSC) respectively and both novel ruthenium (II) complexes have been characterized by elemental analysis, FT-IR and NMR spectroscopy. The peripheral TSC in the complexes acts as an electrochemical coupling unit providing the ability to carry out electrochemical deposition (ED) and to form an electro-deposited film on a graphite electrode surface. The biosensing applicability of complexes 1 and 2 was investigated by using glucose oxidase (GOx) as a model enzyme. Electrochemical measurements at -0.9 V versus Ag/AgCl electrode by following the ED Ru(II) reduction/oxidation due to from the enzyme activity, in the presence of glucose substrate. The designed biosensor showed a very good linearity for 0.01-0.5 mM glucose. The in vitro antimicrobial activities of complexes 1 and 2 were also investigated against nine bacterial strains and one fungus by the disc diffusion test method. No activity was observed against the Gram-negative strains and fungus, whereas complex 1 showed moderate antibacterial activities against Gram-positive bacterial strains. (C) 2014 Elsevier B.V. All rights reserved.
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    Synthesis and Characterization of Stable Hetereocyclic (Schiff Base) Divalent Tin Species and Photogeneration of Their Transition Metal Carbonyl Complexes
    (Taylor & Francis Inc, 2013) Subasi, Elif; Cetin, Salih; Temel, Hamdi
    New stable divalent heterocyclic species [SnL1; 1, SnL2; 2] using ONNO and SNNS tetradentate Schiff bases; N,N'-bis(salicylidene)-1,2-bis(o-aminophenoxy)ethane (H2L1) and N,N'-bis(2-aminothiophenol)-1,4-bis(2-carboxaldehydephenoxy)butane (H2L2) were obtained in good yields by alcolysis of the M-N bonds of the divalent precursor Sn[N(SiMe3)2]2 by diols. They have been isolated as solids at ambient temperature and are monomeric. FT-IR, 1H and 119Sn-NMR spectra are suggestive of N ... M intramolecular coordination. Then the synthesis and characterization of the new stable mono and cis-disubstituted Sn(II) chromium and tungsten carbonyl complexes [L1Sn]M(CO)5 (M= Cr, 3; W, 4); [L2Sn]M(CO)5 (M= Cr, 5; W, 6); cis-[L1Sn]2M(CO)4 (M= Cr, 7; W, 8) and cis-[L2Sn]2M(CO)4 (M= Cr, 9; W, 10) are described. Pentacarbonyl complexes (36) were obtained in high yields by treatment of the M(CO)5THF (M= Cr, W) intermediates with the divalent species [SnL1; 1, SnL2; 2] and tetracarbonyl complexes (710) were synthesized by the photochemical reactions of [LnSn]M(CO)5 with [LnSn] (n = 1, 2). Each of the new carbonyl complexes has been characterized by IR, 1H, 13C, 119Sn-NMR spectroscopy, and mass spectrometry. The sigma donor and pi acceptor ability of the divalent tin species [SnL1, 1; SnL2, 2] as ligands in the transition metal carbonyl complexes (310) is discussed by comparing ?(CO) stretching frequencies.
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    Synthesis, structural characterization, oxygen sensitivity, and antimicrobial activity of ruthenium(II) carbonyl complexes with thiosemicarbazones
    (Taylor & Francis Ltd, 2014) Ozturk, Nurdan; Yaman, Pelin Kose; Yavuz, Murat; Oter, Ozlem; Timur, Suna; Subasi, Elif
    Ru(II) carbonyl complexes were prepared by reacting [Ru(H)(Cl)(CO)(PPh3)(3)] with the respective thiosemicarbazone ligands and the complexes were characterized by UV-vis, FT-IR, and H-1 and P-31 NMR spectroscopy. Oxygen sensitivities and antimicrobial activities of the complexes were determined. [Ru(CO)(PPh3)(2)(eta(3)-O, N-3, S-TSC1)] (1), [Ru(Cl)(CO)(PPh3)(2)(eta(2)-N-3, S-TSC2)] (2), and [Ru(Cl)(CO) (PPh3)2(eta(2)-N-3,S-TSC3)] (3) have been prepared by reacting [Ru(H)(Cl)(CO)(PPh3)(3)] with the respective thiosemicarbazones TSC1 (2-hydroxy-3-methoxybenzaldehyde thiosemicarbazone), TSC2 (3-hydroxybenzaldehyde thiosemicarbazone), and TSC3 (3,4-dihydroxybenzaldehyde thiosemicarbazone) in a 1 : 1 M ratio in toluene and all of the complexes have been characterized by UV-vis, FT-IR, and H-1 and P-31 NMR spectroscopy. The spectroscopic studies showed that TSC1 is coordinated to the central metal as a tridendate ligand coordinating via the azomethine nitrogen (C=N), phenolic oxygen, and sulfur to ruthenium in 1, whereas TSC2 and TSC3 are coordinated to ruthenium as a bidentate ligand through azomethine nitrogen (C=N) and sulfur in 2 and 3. Oxygen sensitivities of 1-3 and [Ru(Cl)(CO)(PPh3)(2)(eta(2)-N-3, S-TSC4)] (4), and antimicrobial activities of 1-3 have been determined.