Near-Infrared Photoluminescence Properties of Endohedral Mono- and Dithulium Metallofullerenes

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• 作者：Zhiyong Wang ; Noriko Izumi ; Yusuke Nakanishi ; Takeshi Koyama ; Toshiki Sugai ; Masayoshi Tange ; Toshiya Okazaki ; Hisanori Shinohara
• 刊名：ACS Nano
• 出版年：2016
• 出版时间：April 26, 2016
• 年：2016
• 卷：10
• 期：4
• 页码：4282-4287
• 全文大小：445K
• 年卷期：0
• ISSN：1936-086X

文摘

The optical properties of endohedral metallofullerene molecules can be tuned by changing the fullerene size as well as the number of metal atoms inside the fullerene cages. In this work we have synthesized and isolated a series of mono- and dithulium metallofullerenes, including Tm@C₈₂ (isomers I, II, III, IV), Tm@C₈₈ (I–IV), Tm₂@C₈₂ (I–III), and (Tm₂C₂)@C₈₂ (I–III). Near-infrared photoluminescence is observed from the thulium metallofullerenes. By changing the number of Tm ion in the fullerene cage, we have found that one can vary and tune the photoluminescence from 1200 to 1300–2000 nm observed for Tm²⁺ (4f¹³) in Tm@C₈₈ and Tm³⁺ (4f¹²) in (Tm₂C₂)@C₈₂, respectively. The photoluminescence intensity depends sensitively on the fullerene cages. (Tm₂C₂)@C₈₂ (III) exhibits the highest photoluminescence intensity among the three structural isomers because of its large HOMO–LUMO energy gap.