Carbonization behavior of iodinated adamantane, adamantane and naphthalene in mixtures with germanium iodide or iodine was studied at pressures of 3.5 and 8 GPa to elucidate diamond-forming catalytic activity of iodine. Using XRD, Raman spectroscopy and TEM as characterization methods, we have found that pyrolysis of iodinated adamantane at 8 GPa is accompanied with formation of nanodiamonds at temperatures exceeding 800 °C. Post-pyrolysis growth of nanodiamonds points out the diamond-forming catalytic activity of iodine. In the samples obtained from precursor mixtures, only graphite was detected as a pyrolysis product, which means that hydrocarbon iodination is a prerequisite for iodine-mediated synthesis of nanodiamonds.

研究了在3.5 GPa和8 GPa的压力下，碘化金刚烷，金刚烷和萘与碘化锗或碘的混合物的碳化行为，以阐明形成金刚石的碘的催化活性。使用XRD，拉曼光谱和TEM作为表征方法，我们发现碘化金刚烷在8 GPa时发生热解时，会在超过800°C的温度下形成纳米金刚石。纳米金刚石的热解后生长指出了碘形成钻石的催化活性。在从前体混合物中获得的样品中，仅检测到石墨为热解产物，这意味着烃碘化是碘介导的纳米金刚石合成的先决条件。