Reversible Polymerization in Doped Fullerides Under Pressure: The Case Of C60(Fe(C5H5)2)2

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• 作者：Wen Cui ; Mingguang Yao ; Dedi Liu ; Quanjun Li ; Ran Liu ; Bo Zou ; Tian Cui ; Bingbing Liu
• 刊名：The Journal of Physical Chemistry B
• 出版年：2012
• 出版时间：March 8, 2012
• 年：2012
• 卷：116
• 期：9
• 页码：2643-2650
• 全文大小：476K
• 年卷期：v.116,no.9(March 8, 2012)
• ISSN：1520-5207

文摘

High-pressure Raman studies have been carried out on single crystalline C₆₀(Fc)₂ nanosheets up to 25.4 GPa. Our results show that the charge transfer between Fc (ferrocene) and C₆₀ increases in the low-pressure range. Above 5 GPa, C₆₀ molecules start to form a chainlike polymer structure, and this polymerization is reversible upon decompression, in contrast to that of pristine C₆₀. The special layered structure of C₆₀(Fc)₂ restricts the polymerization of C₆₀ molecules in some directions and explains the formation of the linear chainlike polymeric structure of the C₆₀ lattice under pressure. We suggest that the reversible polymerization is related to the increased charge transfer and the overridden steric repulsion of counterions.