Synthesis, third-order nonlinear absorption and refraction of fullerene dyads containing fluorene

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• 作者：Xinhua Ouyang ; Gongchang Zeng ; Heping Zeng ; Wei Ji
• 关键词：Fullerene– ; fluorene ; Nonlinear optical properties ; Two-photon absorption
• 刊名：Journal of Photochemistry and Photobiology A: Chemistry
• 出版年：2010
• 出版时间：10 June 2010
• 年：2010
• 卷：213
• 期：1
• 页码：7-13
• 全文大小：1372 K

文摘

Two new fullerene–fluorene dyads, N-methyl-2-(2-fluorenyl)-3,4-[60]fuller-pyrrolydine (1) and N-methyl-2-(2-fluorenyl)-3,4-[70]fullerpyrrolydine (2), were synthesized and their structures were confirmed by MALDI-MS, ¹H NMR and FT-IR. Their electrochemical and optical properties were investigated by cyclic voltammetry and Z-scan technique, including, electronic potentials, two-photon absorption cross-sections (σ₂), nonlinear refractive indexes (n₂), microscopic second-order hyperpolarizabilities (γ_R) and third-order nonlinear susceptibilities ( and ). Importantly, the and σ₂ in 2 were increased above 35 % due to [70]fullerene unit than that of 1.