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

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• 作者：H. Gü ; l Yağ ; lı ; oğ ; lu ; Metin Arslan ; Ş ; aziye Abdurrahmanoğ ; lu ; Hü ; seyin Ü ; nver ; Ayhan Elmali ; Ö ; zer Bekaroğ ; lu
• 关键词：A. Organometallic compounds ; B. Chemical synthesis ; D. Optical properties
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2008
• 出版时间：January 2008
• 年：2008
• 卷：69
• 期：1
• 页码：161-167
• 全文大小：249 K

文摘

A 4-(4,6-diaminopyrimidin-2-ylthio) substituted double-decker Lu(III) phthalocyanines (4) have been prepared and characterized by elemental analysis, IR, UV–vis and ¹H 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/cm² 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/cm² peak intensity at 10 Hz. We measured the effective nonlinear refractive index of the material as 1.2×10⁻¹¹ esu at 3.5×10⁻⁴ M concentration with the peak intensity less than 0.72 GW/cm² and we found that nonlinear absorption was very small. On the other hand, when concentration is increased to 2.4×10⁻³ M material's nonlinear absorption becomes dominant mechanism for the nonlinear response and the compound 4 indicates OL behavior at 2.4×10⁻³ M concentration.