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  • Küçük Resim
    Öğe
    Antimicrobial activities, absorption characteristics and tautomeric structures of o,o’-hydroxyazo dyes containing an acryloyloxy group and their chromium complexes
    (Hacettepe University, 2012) Alp Avcı, Gülçin; Özkınalı, Sevil; Özlük, Aydın; Avcı, Emre; Kocaokutgen, Hasan
    E-1-((2-hydroxy-5-methylphenyl)diazenyl)naphthalene-2,7-diol’ün ve akrilat türevlerinin ve onların krom komplekslerinin farklı çözücüler, pH ve sıcaklıklardaki UV-VIS davranışları tespit edildi. Çözücü içinde boyalar azo ve hidroazo tautomeric dengede bulundu. Aynı zamanda o,o’-dihydroksi azo boyaları ve krom komplekleri Enterococcus faecalis, Staphylococcus aureus, Pseudomonas aeroginosa, Escherichia coli ve Candida albicans antimikrobiyal aktivite açısından test edildi. Boya I genellikle tüm mikroorganizmalar üzerine etkili iken, II, III ve IV’ cü bileşikler P. aeroginosa ve E. coli üzerine daha fazla etkilidir. Boya I hem bakteriler hem de mayalar üzerinde antimikrobiyal etkiye sahip olduğu için, tekstilde lif boyaması ve biyomedikal çalışmalar gibi çeşitli uygulamalarda kullanımı uygun bulunmuştur. Bu boya önemli ölçüde yeni antifungal ilaçların geliştirilmesine yol açabilir.
  • [ X ]
    Öğe
    Synthesis, spectral characterisation and thermal behaviours of some new p-tert-butylcalix[4]arene and calix[4]arene-esters containing acryloyl groups
    (2013) Özkınalı, Sevil; Kocaokutgen, Hasan
    The mono-, di-, tri-, and tetra-acryloyl esters of p-tert-butylcalix [4]arene and calix[4]arene were synthesised by reacting acryloyl chloride with sodium salts of p-tert-butylcalix[4]arene and calix[4]arene in THF. The structures of these compounds were characterised by IR, UV-VIS, 1H NMR, and 13C NMR. Thermal behaviour of the compounds were also examined by means of differential thermal analysis (DTA), thermogravimetry (TG), and derivative thermogravimetry (DTG). © 2012 Elsevier B.V. All rights reserved.
  • [ X ]
    Öğe
    Synthesis, Spectroscopic and Thermal Analysis and Investigation of Dyeing Properties of o-Hydroxy Schiff Bases and Their Metal Complexes
    (Wiley-V C H Verlag Gmbh, 2020) Ozkinali, Sevil; Yavuz, Senol; Tosun, Tugce; Ali Kose, Dursun; Gur, Mahmut; Kocaokutgen, Hasan
    Two series of new Schiff base metal complexes (Cu(II), Ni(II), Co(II), Mn(II), Zn(II)) were synthesized and used to study their fastness and thermal properties. All of the dyes were applied on cotton, polyester and cellulose acetate fabrics as reactive dyes by using temperature and 1 : 20 Flotte ratio. Washing, rubbing and light fastness was investigated by ISO 105-C06 A2S, TS EN ISO 105-X12 and ISO 105-B02 methods, respectively and obtained very well to excellent results. Structures of the metal complex dyes were elucidated by IR, UV-Vis, H-1-NMR, C-13-NMR, mass spectroscopic techniques, magnetic susceptibility measurements, elemental analysis, and thermal analysis. Spectroscopic results indicate that all of the complexes adopt octahedral geometry. Also the results indicate that the complexes are formed by the binding of a metal ion with two Schiff bases by using two >C=N- groups, two hydroxyl groups and two aqua ligands. In the present study, for the first time, fabrics were dyed with Schiff bases and metal complexes, and then, their fastness analyses were carried out and were obtained fine results.