RADICAL REACTIONS OF C60
RADICAL REACTIONS OF C60
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DOI：
10.1126/science.254.5035.1183
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发表时间：
1991-11-22
期刊：
影响因子：
56.9
通讯作者：
PRESTON, KF
中科院分区：
文献类型：
--
作者：
KRUSIC, PJ;WASSERMAN, E;PRESTON, KF
光化学产生的苄基自由基与 C60 反应，产生自由基和非自由基加合物 R(n)C60 (R = C6H5CH2)，n = 1 至至少 15。n = 3 和 5 的自由基加合物在 50 摄氏度以上稳定，并通过电子自旋共振 (ESR) 光谱鉴定为烯丙基 R3C60.(3) 和环戊二烯基R5C60.(5) 自由基。不成对电子高度集中在 C60 表面。这些自由基的非凡稳定性可归因于周围的苄基取代基对表面自由基位点的空间保护。光化学产生的甲基自由基也很容易加成到 C60 上。质谱分析显示 (CH3)nC60 的形成，其中 n = 1 至至少 34。
Photochemically generated benzyl radicals react with C60 producing radical and nonradical adducts R(n)C60 (R = C6H5CH2) with n = 1 to at least 15. The radical adducts with n = 3 and 5 are stable above 50-degrees-C and have been identified by electron spin resonance (ESR) spectroscopy as the allylic R3C60.(3) and cyclopentadienyl R5C60.(5) radicals. The unpaired electrons are highly localized on the C60 surface. The extraordinary stability of these radicals can be attributed to the steric protection of the surface radical sites by the surrounding benzyl substituents. Photochemically generated methyl radicals also add readily to C60. Mass spectrometric analyses show the formation of (CH3)nC60 with n = 1 to at least 34.