Nonlinear absorption behaviors of filled and unfilled d shell metal complexes of 5, 10, 15, 20-tetrakis(4-hydroxyphenyl)porphyrin


Dogan N., Dumanogullari F. M. , HAYVALI M., YILMAZ H., Kurum U., YAĞLIOĞLU H. G. , ...More

CHEMICAL PHYSICS LETTERS, vol.508, pp.265-269, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 508
  • Publication Date: 2011
  • Doi Number: 10.1016/j.cplett.2011.04.047
  • Title of Journal : CHEMICAL PHYSICS LETTERS
  • Page Numbers: pp.265-269

Abstract

We study nonlinear absorption behaviors of 5, 10, 15, 20-tetrakis(4-hydroxyphenyl)porphyrins with the central metal ions: Zn(2+), Ni(2+), Co(2+), and Fe(3+) by open aperture Z-scan technique with 65 ps or 4 ns pulse duration. For 65 ps pulse duration the filled d shell compounds exhibit nonlinear absorption while the unfilled d shell compounds exhibit saturable absorption. For 4 ns pulse duration Ni, Co and Fe compounds exhibit nonlinear absorption at high fluence while Ni compound exhibits saturable absorption at low fluence. The observed nonlinear absorption behaviors depending on the central metal ion and pulse duration are discussed using excited-state lifetimes found from pump-probe spectroscopy. (C) 2011 Elsevier B. V. All rights reserved.