Abstract

A mixture of iron carbides and fullerene C₆₀ formed by electric arc synthesis has been hydroxylated by adding OH groups to the fullerene surface, which made it possible, according to the EXAFS data, to obtain almost pure fullerenol Fe@C₆₀(OH)₃₀. Powder samples of the fullerenol and the product obtained after its dehydroxylation have been examined using Mössbauer spectroscopy. The Mössbauer spectra have been processed under the assumption of superposition of three partial doublets of spectral lines. It is established that two doublets due to Fe³⁺ dominate in the fullerenol spectrum. For the reduced fullerene Fe@C₆₀ sample, two doublets are due to Fe³⁺ and the Fe²⁺ doublet dominates. Thus, attachment of OH groups from the outer side of the fullerene carbon frame increases the oxidation state of iron, which shows that the iron atom is located inside the frame.

中文翻译：

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基于NGR光谱和EXAFS的基于富勒烯С60的结构中铁与碳的价和配位

摘要

通过EXAFS数据，通过在富勒烯表面添加OH基团，使通过电弧合成形成的碳化铁和富勒烯C _60的混合物羟基化，从而有可能获得几乎纯的富勒烯醇Fe @ C ₆₀（OH）₃₀。富勒烯醇的粉末样品和脱羟基后获得的产品已使用穆斯堡尔光谱法进行了检查。Mössbauer光谱是在假设光谱线的三个部分二重峰重叠的情况下进行处理的。已经确定，由于Fe ³⁺引起的两个双峰在富勒烯醇光谱中占主导。对于还原的富勒烯Fe @ C ₆₀样品，由于Fe ³⁺和Fe ²⁺导致两个双峰双胞胎占主导地位。因此，从富勒烯碳框架的外侧附接OH基团增加了铁的氧化态，这表明铁原子位于框架内部。