State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
J Phys Chem B. 2012 Mar 8;116(9):2643-50. doi: 10.1021/jp210712y. Epub 2012 Feb 24.
High-pressure Raman studies have been carried out on single crystalline C(60)(Fc)(2) nanosheets up to 25.4 GPa. Our results show that the charge transfer between Fc (ferrocene) and C(60) increases in the low-pressure range. Above 5 GPa, C(60) molecules start to form a chainlike polymer structure, and this polymerization is reversible upon decompression, in contrast to that of pristine C(60). The special layered structure of C(60)(Fc)(2) restricts the polymerization of C(60) molecules in some directions and explains the formation of the linear chainlike polymeric structure of the C(60) lattice under pressure. We suggest that the reversible polymerization is related to the increased charge transfer and the overridden steric repulsion of counterions.
高压拉曼研究已经在单晶 C(60)(Fc)(2)纳米片上进行到 25.4 GPa。我们的结果表明，Fc（二茂铁）和 C(60)之间的电荷转移在低压范围内增加。在 5 GPa 以上，C(60)分子开始形成链状聚合物结构，与原始 C(60)相比，这种聚合在减压时是可逆的。C(60)(Fc)(2)的特殊层状结构限制了 C(60)分子在某些方向上的聚合，并解释了在压力下 C(60)晶格形成线性链状聚合物结构的原因。我们认为，可逆聚合与增加的电荷转移和抗衡离子的空间排斥克服有关。
