Yazar "Ozdemir, Saliha" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Synthesis and characterization of novel series of Fe(II)-mixed ligand complexes involving 2,2 '-bipyridyl ligand
    (Elsevier Sci Ltd, 2013) Soliman, Ahmed A.; Amin, Mina A.; El-Sherif, Ahmed A.; Ozdemir, Saliha; Varlikli, Canan; Zafer, Ceylan
    Mixed ligand complexes of Fe(II) with 2,2'-Bipyridyl (bipy) and some aromatic amines (L) (L = 3,4-diamino benzoic acid (DABA), 2-hydazinopyridine (hzpy) or 4-chloro-o-phenylenediamine (4-Cl-o-PDA) have been synthesized and characterized using IR, Mass, and UV-Vis spectrometry, magnetic susceptibility and thermal analysis. The complexes have been proved to have an octahedral geometry with equilibrium between high spin and low spin states which is reflected from the values of the mu(eff) (3.34-4.09). The electrochemical properties of these complexes have been studied using cyclic voltammetry. The structure of the Fe(II)-complexes have been geometrically optimized using parameterized PM3 semiempirical method. The photovoltaic performances of the complexes have been tested. (C) 2013 Elsevier Ltd. All rights reserved.
  • Küçük Resim Yok
    Öğe
    The synthesis of 1,8-naphthalimide groups containing imidazolium salts/ionic liquids using I-, PF6-, TFSI- anions and their photophysical, electrochemical and thermal properties
    (Elsevier Sci Ltd, 2010) Ozdemir, Saliha; Varlikli, Canan; Oner, Ilker; Ocakoglu, Kasim; Icli, Siddik
    1,8-Naphthalimide groups containing imidazolium iodide salts of different alkyl chain length on the imidazole group were synthesized. Hexafluorophosphate and bis(trifluoromethanesulfonyl)imide salts were obtained by ion exchange reactions. The synthesized salts were characterized using a variety of spectroscopic techniques. Fluorescence emission quenching of iodide and bis(trifluoromethanesulfonyl) imide salts were studied using a ruthenium dye, whilst that of hexafluorophosphate salts were performed using tris(8-hydroxyquinoline)aluminum. Calculated fluorescence quenching rate constants were as high as 10(14)M(-1)s(-1) and values of the Gibbs free energy of electron transfer were [-32.04/-33.681],[-17.52/-20.741] and [-26.50/-30.89] kcal mol(-1) for the iodide, hexafluorophosphate and bis(trifluoromethanesulfonyl) imide salts, respectively. The thermal stability of the synthesized salts was high especially in the case of bis (trifluoromethanesulfonyl)imide salts for which values of 470-498 degrees C were achieved. Photostability studies of hexafluorophosphate and bis(trifluoromethanesulfonyl)imide salts were also performed: calculated photodegradation half-life values ranged from 19.25 to 48.12 h. (C) 2010 Elsevier Ltd. All rights reserved.