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    The Effect of Electrolytes on the Interaction of C. I. Reactive Orange 16-Tetradecyltrimethylammonium Bromide
    (Carl Hanser Verlag, 2013) Akbas, Halide; Taner, Tanzer
    The aim of this study is to investigate the interaction of a cationic surfactant tetradecyltrimethyl ammonium bromide (TTAB) on the electronic absorption spectra of azo dye Reactive Orange 16 (RO16) and to observe the effects of the kind and concentration of electrolytes on these interactions by means of UV-Vis spectroscopy in submicellar and micellar concentration range at a certain temperature (303 K). TTAB affects the electronic absorption spectra of dye solution that is dye-surfactant interaction results into formation of complex and therefore, a decrease in maximum absorption spectra (1.577 at 494 nm). The electrolyte anions cause an increase on the absorbance of TTAB-RO16 ion-pair complex in the following order: Br- > Cl- > SO42- > NO3- > CN- and also for cations; Na+ > K+ > NH4+ > Mg2+. The increase or decrease on absorption spectra of RO16-TTAB solution depends on concentration range of the electrolyte added.
  • Küçük Resim Yok
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    Katyonik alkiltrimetilamonyum bromür surfaktantlar ile C.I. reactive orange 16 etkileşimi
    (Trakya Üniversitesi, 2006) Taner, Tanzer; Akbaş, Halide
    Bir reaktif boya olan C.I Reactive Orange 16 ile katyonik surfaktantçözeltilerinin karıştırılması ile oluşturulan sistemlerdeki etkileşimler konduktometrik vespektrofotometrik metotla araştırıldı. Ayrıca elektrolitlerin ilavesi ile oluşan absorbansdeğerindeki değişimler spektrofotometrik olarak incelendi. Surfaktanların farklısıcaklıklardaki Kritik Misel Konsantrasyonları ( KMK) bulundu.Bu tezde katyonik surfaktant olarak alkiltrimetilamonyum bromür serisinin( CnTAB, n = 12, 14, 16, 18 ) farklı sıcaklıklardaki konsantrasyon değişimiyleiletkenlikleri ölçülerek kritik misel konsantrasyon ( KMK ) değerleri bulundu. Anyonikboya sabit konsantrasyonda, katyonik surfaktantlar ise KMK değerinin altında veüzerindeki konsantrasyonlarda alınarak iletkenlikleri araştırıldı ve bu çözeltilerinspektrofotometrik metotla absorbans değişimleri incelendi.Çalışmanın ikinci kısmında elektrolitlerden KCl sabit tutuldu ve surfaktanlardeğiştirilerek boya absorbansındaki değişim incelendi. Sonra surfaktanlardan TTABsabit tutuldu ve elektrolitler ( KCN, KNO3, KCl, NH4Cl, NaCl, NaBr, MgCl2 ve K2SO4)değiştirilerek surfaktant-boya çözeltisinin absorbansındaki değişim ve elektrolitlerinnasıl bir etki yaptığı incelendi. Spektral değişimler surfaktantlar ve elektrolitin cinsineve konsantrasyonuna bağlıdır.Bu tez 2006 yılında 70 sayfa olarak hazırlanmıştır.ANAHTAR KEL MELER: Anyonik boyarmadde, Katyonik surfaktant, boyarmadde -surfaktant etkileşimi, Kritik misel oluşumu, karışık misel, iletkenlik
  • Küçük Resim Yok
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    Spectroscopic studies of interactions between CI Reactive Orange 16 with alkyltrimethylammonium bromide surfactants
    (Pergamon-Elsevier Science Ltd, 2009) Akbas, Halide; Taner, Tanzer
    In the present study, the influence of surfactants on spectral properties of an azo dye in aqueous solutions has been investigated by means of UV-vis spectroscopy in submicellar and micellar concentration range. The spectral signature of the polarity of the azo dye C.I. Reactive Orange 16 (RO16) exhibits sensitivity to the polarity of the dye's environment. This dependence of absorption on microenvironment was used to investigate the ion pair complex formed from electrostatic interaction of a series of alkyltrimethylammonium bromide surfactants (C(m) TAB, m = 12, 14, 16 and 18) with the anionic azo dye R016. It was observed that the aggregation of surfactant and dye takes place at surfactant concentration far below the critical micelle concentration of the individual surfactant. Aggregation is reflected by the appearance of a new absorption band in the spectrum of the dye. Spectral behavior of dye-surfactant solution with varying concentration of surfactant confirms that electrostatic interaction between dye and surfactant occurs up to a certain level. Beyond this concentration, with addition of surfactant, micelles occur and all dye molecules are accommodated into a normal micelle as monomeric molecules. The short-range hydro phobic interactions are very important factors as the long-range electrostatic forces on the dye-surfactant aggregation in aqueous solution. The effect of the length of the alkyl chain of the surfactant on the complex formation between cationic surfactant and reactive dye was that the hydrophobicity of alkyl chains plays an important role in complex formation. Going from less hydrophobic solution to the more hydrophobic micellar environment, the occurrence of complex is found at lower surfactant concentration. Because the CIVIC values of dye-surfactant solution are decreased with increasing alkyl chain length. (C) 2009 Elsevier B.V. All rights reserved.