The nonlinear refraction and nonlinear absorption in 4-(4,6-diaminopyrimidin-2-ylthio) substituted double-decker Lu(III) phthalocyanine


Yaglioglu H. G. , Arslan M., ABDURRAHMANOĞLU Ş. , ÜNVER H., ELMALI A., Bekaroglu O.

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, cilt.69, ss.161-167, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 69 Konu: 1
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.jpcs.2007.08.012
  • Dergi Adı: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
  • Sayfa Sayıları: ss.161-167

Özet

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.