Synthesis and reactivity of N@C60O.
Synthesis and reactivity of N@C60O.
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N@C60O的合成和反应性。
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
G. Briggs
中科院分区：
文献类型：
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作者：
M. A. G. Jones;D. Britz;J. Morton;A. Khlobystov;Kyriakos Porfyrakis;A. Ardavan;G. Briggs
合成了面内富勒烯环氧化物N@C60O，用高效液相色谱分离，用电子自旋共振(ESR)进行了表征。在77K时，粉末中的零场分裂D参数为6.6 MHz，E参数为0.5 MHz，证明了该氮自由基表现出与单加合物的主要轴对称特征。观察到光和热激活的氮自由基的沉默，后者显示在100℃加热过程中新的自旋信号的演化。我们认为，氮自旋的损失是由于与环氧化物环打开形成的自由基耦合所致。这意味着C60O与C60在固态下的反应是通过自由基中间体进行的，而不是离子中间体。
The endohedral fullerene epoxide N@C60O was synthesised, isolated by High Performance Liquid Chromatography (HPLC), and characterised by Electron Spin Resonance (ESR). This nitrogen radical displays predominantly axial symmetry characteristics as expected for a monoadduct, evidenced by a zero-field splitting D parameter of 6.6 MHz and an E parameter of 0.5 MHz in powder at 77 K. Photo- and thermally-activated silencing of the nitrogen radical were observed, the latter showing the evolution of a new spin signal during heating at 100 degrees C. We suggest that loss of nitrogen spin is due to coupling with a radical formed by opening of the epoxide ring. This implies that the reaction of C60O with C60 in the solid state proceeds via a radical, rather than ionic, intermediate.
影响因子：
15
作者：
Paul, P;Kim, KC;Reed, CA
通讯作者：
Reed, CA