The fullerene dimer C120 and related carbon allotropes
The fullerene dimer C120 and related carbon allotropes
复制标题
DOI：
10.1016/s0008-6223(00)00051-8
复制
发表时间：
2000-01-01
期刊：
影响因子：
10.9
通讯作者：
Murata, Y
中科院分区：
文献类型：
--
作者：
Komatsu, K;Fujiwara, K;Murata, Y
发现在钾盐如KCN、KOH和KOAc，或少量碱金属，或什至有机固体胺如4-氨基吡啶存在下，C-60在固态机械化学反应条件下二聚生成C-120。推测该反应涉及C-60自由基阴离子的形成，并且在C-60和C-120之间达到平衡状态。当固相反应在4-氨基吡啶催化下进行时，还观察到形成少量（收率约4%）的富勒烯三聚体C-180。通过APCI MS光谱证实三聚体C-180为其氰化衍生物，并通过红外和紫外-可见光谱进行表征。根据HPLC分析结果，C-180至少有四种异构体。在 4-氨基吡啶存在下，C-60 与 C-70 发生固态反应，除了 C-120 (6%) 之外，还以低产率 (接近 2%) 提供交叉二聚体 C-130。二聚体C-130也通过APCI MS光谱证实为氰化衍生物，并通过UV-vis和C-13 NMR光谱进行了表征。 (C) 2000 Elsevier Science Ltd. 保留所有权利。
Dimerization of C-60 under the solid-state mechanochemical reaction conditions to give C-120 was found to occur in the presence of potassium salts such as KCN, KOH, and KOAc, or of a small amount of alkali metals, or even of organic solid amines such as 4-aminopyridine. The reaction is presumed to involve the formation of the C-60 radical anion, and an equilibrium state is attained between C-60 and C-120. When the solid-state reaction was conducted under the catalysis of 4-aminopyridine, the formation of a small amount (similar to 4% yield) of fullerene trimer C-180 was also observed. The trimer C-180 was confirmed as its cyanated derivative by APCI MS spectroscopy, and was characterized by IR and UV-Vis spectroscopies. Based on the results of HPLC analyses, there are at least four isomers of C-180. The solid-state reaction of C-60 with C-70 in the presence of 4-aminopyridine afforded the cross-dimer C-130 in a low yield (similar to 2%) in addition to C-120 (6%). The dimer C-130 was also confirmed as the cyanated derivative by APCI MS spectroscopy, and was characterized by UV-vis and C-13 NMR spectroscopies. (C) 2000 Elsevier Science Ltd. All rights reserved.