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ABDURRAHMANOĞLU, ŞAZİYE

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ABDURRAHMANOĞLU

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ŞAZİYE

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2008 - 20092
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End date: 2009 × Subject: SANDWICH DILUTETIUM TETRAPHTHALOCYANINE ×

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    The nonlinear refraction and nonlinear absorption in 4-(4,6-diaminopyrimidin-2-ylthio) substituted double-decker Lu(III) phthalocyanine
    (PERGAMON-ELSEVIER SCIENCE LTD, 2008) ABDURRAHMANOĞLU, ŞAZİYE; Yaglioglu, H. Guel; Arslan, Metin; Abdurrahmanoglu, Saziye; Unver, Huseyin; Elmali, Ayhan; Bekaroglu, Ozer
    A 4-(4,6-diaminopyrimidin-2-ylthio) substituted double-decker Lu(III) phthalocyanines (4) have been prepared and characterized by elemental analysis, IR, LIV-vis and H-1 NMR spectroscopies. The nonlinear refractive index, nonlinear absorption and the optical limiting (OL) performance of the compound 4 in a 0.5 mm spectroscopic cell in DMF solution were investigated by using 4 ns pulse laser at 532 nm. Z-scan experiments have been conducted between 0.24 and 2.39 GW/cm(2) peak intensities for 10 Hz repetition rate and also between 2.39 and 23.89 GW/cm2 peak intensities for 1 Hz repetition rate. The thermal effect contributes to the nonlinear response of the material higher than 0.72 GW/cm(2) peak intensity at 10 Hz. We measured the effective nonlinear refractive index of the material as 1.2 x 10(-11) esu at 3.5 x 10(-4) M concentration with the peak intensity less than 0.72 GW/cm(2) and we found that nonlinear absorption was very small. On the other hand, when concentration is increased to 2.4 x 10(-3) M material's nonlinear absorption becomes dominant mechanism for the nonlinear response and the compound 4 indicates OL behavior at 2.4 x 10(-3) M concentration. (C) 2007 Elsevier Ltd. All rights reserved.
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    Synthesis and Characterization of Novel Zn(II) Dimeric Phthalocyanines
    (SPRINGER, 2009) ABDURRAHMANOĞLU, ŞAZİYE; Abdurrahmanoglu, Saziye; Bulut, Mustafa; Bekaroglu, Oezer; Sener, B
    Starting with tetracyanodibenzo(1,4,7,10-tetrathia-(12-crown-4)) (1) and 4-nitro-1,2-dicyanobenzene (2), nitro-substituted dimeric phthalocyanine (3) was synthesized. In the second step, using hydrazine hydrate as a reductant, amine-substituted dimeric phthalocyanine (4) was synthesized from nitro-substituted dimeric phthalocyanine. Structrures of all synthesized compounds were determined by elemental analyses, UV/vis, H-1-NMR and IR spectroscopy.