Tarábek Ján, Yang Shangfeng, Dunsch Lothar
Leibniz Institute of Solid State and Materials Research, Group of Electrochemistry and Conducting Polymers, Helmholtzstr. 20, 01171 Dresden, Germany.
Chemphyschem. 2009 May 11;10(7):1037-43. doi: 10.1002/cphc.200800811.
The redox behavior of mixed lutetium/yttrium nitride clusterfullerenes of the series Lu(x)Y(3-x)N@C(80)(I(h), x = 0-3) is studied for the first time by means of cyclic voltammetry, fast-scan cyclic voltammetry, square-wave voltammetry, and electron paramagnetic resonance (EPR) spectroelectrochemistry. A reversible single-electron-transfer process, which does not result in an EPR signal, is detected during the anodic oxidation sweep of cyclic voltammetry experiments performed at different temperatures (296 and 360 K). The cathodic reduction sweep reveals a rather complex response for all the four clusterfullerenes--with up to three irreversible reduction steps. By correlating the results of fast-scan and square-wave voltammetry and combining them with simulations of the voltammograms, we are able to propose a reduction mechanism for the Lu(x)Y(3-x)N@C(80)(I) (x = 0-3) fullerenes.
首次通过循环伏安法、快速扫描循环伏安法、方波伏安法和电子顺磁共振（EPR）光谱电化学法研究了系列Lu(x)Y(3 - x)N@C(80)(I(h), x = 0 - 3)的混合镥/钇氮化物团簇富勒烯的氧化还原行为。在不同温度（296和360 K）下进行的循环伏安法实验的阳极氧化扫描过程中，检测到一个可逆的单电子转移过程，该过程不会产生EPR信号。阴极还原扫描显示，所有四种团簇富勒烯都有相当复杂的响应——多达三个不可逆还原步骤。通过关联快速扫描和方波伏安法的结果，并将它们与伏安图模拟相结合，我们能够提出Lu(x)Y(3 - x)N@C(80)(I) (x = 0 - 3)富勒烯的还原机理。
