How many [2+2] four-membered rings are formed on a C-60 molecule when photopolymerization is saturated?
How many [2+2] four-membered rings are formed on a C-60 molecule when photopolymerization is saturated?
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DOI：
10.1103/physrevlett.79.2987
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发表时间：
1997-10-20
影响因子：
8.6
通讯作者：
Takeuchi, K
中科院分区：
文献类型：
--
作者：
Onoe, J;Takeuchi, K
用X-射线光电子能谱测定了光聚C-60薄膜中相邻C-60分子间[2+2]四元交联键的饱和数，利用C-60的pi-pi*电子的pi-pi*跃迁产生的C1s振动卫星的强度测定了C-60光聚合薄膜的饱和数.结果表明，当聚合反应达到饱和时，C-60分子上形成了6个[2+2]环。根据饱和数和原始C-60膜的结构推测了C-60聚合物的可能构型。
The saturation number of the [2 + 2] four-membered cross-link between adjacent C-60 molecules in a photopolymerized C-60 film has been determined using the intensity of the C 1s shake-up satellite, which originates from the pi-pi* transition of pi electrons of C-60, by x-ray photoelectron spectroscopy. It was found that six [2 + 2] rings were formed on a C-60 molecule when polymerization was saturated. A possible configuration of the C-60 polymer was postulated on the basis of the saturation number and the structure of a pristine C-60 film.