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Enhanced 1520 nm photoluminescence from Er3+ ions in di-erbium-carbide metallofullerenes (Er2C2)@C-82 (isomers I, II, and III)

Ito, Yasuhiro and Okazaki, Toshiya and Okubo, Shingo and Akachi, Masahiro and Ohno, Yutaka and Mizutani, Takashi and Nakamura, Tetsuya and Kitaura, Ryo and Sugai, Toshiki and Shinohara, Hisanori (2007) Enhanced 1520 nm photoluminescence from Er3+ ions in di-erbium-carbide metallofullerenes (Er2C2)@C-82 (isomers I, II, and III). ACS NANO, 1 (5). pp. 456-462.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nn700235z

Abstract

Di-erbium and di-erbium-carbide endohedral metallofullerenes with a C-82, cage such as Er-2@C-82 (isomers I, II, and III) and (Er2C2)@C-82 (isomers I, II, and III) have been synthesized and chromatographically isolated (99%). The structures of Er-2@C-82 (I II, III) and (Er2C2)@C-82 (I, II, III) metallofullerenes are characterized by comparison with the UV-vis- NIR absorption spectra of (Y2C2)@C-82 (I, II, III), where molecular symmetries of the structures are determined to be C-s, C-2v and C-3v, respectively. Furthermore, enhanced near-infrared photoluminescence (PL) at 1520 nm from Er3+ ions in Er-2@C-2 (I, III) and (Er2C2)@C-82 (I, III) have been observed at room temperature. The PL intensities have been shown to depend on the symmetry of the C-82 cage. In particular, the PL. intensity of (Er2C2)@C-82 (III) has been the strongest among the isomers of Er-2@C-82 and (Er2C2)@C-82. optical measurements indicate that the PL properties of Er-2@C-82 (I, II, III) and (Er2C2)@C-82 (I, II III) correlate strongly with the absorbance at 1520 nm and the HOMO-LUMO energy gap of the C-82 cage.

Item Type:Article
Uncontrolled Keywords:metallofullerene; erbium; photoluminescence; metal-carbide; endohedral fullerene
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:2888
Deposited By:Farnush Anwar
Deposited On:12 Jan 2009 11:48
Last Modified:23 Jan 2009 10:48

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