激光烧蚀C_(60)衍生物产生奇数碳笼团簇  

Formation of Odd-Numbered Carbon Cage-Like Clusters by Laser Ablation of Fullerene Derivatives

作　　者：赵利[1] 王嘉宇 孔庆宇 李郁芬 钟超凡 蔡瑞芳 黄祖恩 

机构地区：[1]三束材料改性国家重点实验室复旦分部

出　　处：《复旦学报（自然科学版）》2000年第2期158-162,共5页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金!(69608003;29890216);上海应用物理研究中心资助项目!(97JC14018)

摘　　要：利用激光烧蚀飞行时间质谱技术研究了Ｃ_(６０)衍生物Ｃ_(６０)ＣＨ_２，Ｃ_(６０)Ｒ_２和Ｃ_(６０)ＨＲ（Ｒ＝Ｃ_６Ｈ_５ＣＯ－）的富勒烯团簇动力学，在负离子通道，对 Ｃ_(６０)ＣＨ_２及 Ｃ_(６０)Ｒ_２可清楚地观测到 Ｃ_(５５)－，Ｃ_(５７)－等碳笼团簇离子，而对 Ｃ_(６０)ＨＲ虽然其正离子谱与Ｃ_(６０)ＣＨ_２和Ｃ_(６０)Ｒ_２相似，却观测不到奇数碳笼团簇的产生．初步讨论了奇数碳笼团簇的产生及其与衍生物结构的关系．Three C_(60) derivatives C_(60)CH_2, C_(60)R_2 and C_(60)HR(R=C_6H_5CO-) are studied by laser ablation time-of flight mass spectrometric technique. In the negative ion mass spectra of C_(60)CH_2 and C_(60)R_2,odd-numbered clusters C_(57)^-, C_(55)^- can clearly be observed in addition to the even-numbered fullerene fragment ions. For the monoadduct C60HR, no odd-numbered specy is detected even though its positive ion mass spectrum is similar to those of C_(60)CH_2 and C_(60)R_2. The formation mechanism of odd-numbered carbon cage-like clusters and its relationship to the structure of the fullerene derivative are discussed.

关 键 词：飞行时间质谱 碳笼团簇 碳60衍生物 激光烧蚀 

分 类 号：O613.71[理学—无机化学]