碱金属掺杂 AxC60 薄膜的拉曼研究（A = Na、K、Rb 和 Cs；x = 0、3 和 6）。

Raman Studies of Alkali-Metal Doped AxC60 Films (A = Na, K, Rb, and Cs; x = 0, 3, and 6).

出版信息

Science. 1991 Dec 13;254(5038):1625-7. doi: 10.1126/science.254.5038.1625.

DOI:10.1126/science.254.5038.1625

Abstract

The room temperature Raman spectra of the intramolecular modes between 100 cm(-1) and 2000 cm(-1) are reported for alkali-metal doped AxC(60) films. For A = K, Rb, and Cs, phase separation is observed with the spectra of C(60), K(3)C(60), K(6)C(60), Rb(3)C(60), Rb(6)C(60), and Cs(6)C(60) phases reported. The x = 3 phases show only three Raman active modes: two of Ag symmetry and only the lowest frequency Hg mode. The other Hg modes regain intensity in the x = 6 films, with several mode splittings observed. For A = Na, such phase separation is not clearly observed, and reduced mode shifts are interpreted as due to incomplete charge transfer in these films.

摘要

报道了室温下 100 cm(-1) 到 2000 cm(-1) 之间的分子内模式的碱金属掺杂 AxC(60) 薄膜的拉曼光谱。对于 A = K、Rb 和 Cs，观察到相分离，报道了 C(60)、K(3)C(60)、K(6)C(60)、Rb(3)C(60)、Rb(6)C(60) 和 Cs(6)C(60) 相的光谱。x = 3 相仅显示三个拉曼活性模式：两个 Ag 对称和仅最低频率 Hg 模式。其他 Hg 模式在 x = 6 薄膜中恢复强度，观察到几个模式分裂。对于 A = Na，没有明显观察到这种相分离，并且模式位移减小解释为这些薄膜中不完全的电荷转移。