Abstract

Experiments that probe the fundamental properties of endohedral fullerenes often require the preparation of molecular beams or thin films of the neutral molecules. It is challenging to cleanly sublime this class of molecules without producing some thermal degradation. We report combined gas phase and scanning tunnelling microscopy studies that probe the thermal decay of commercial [Li⁺C₆₀]PF₆^- in a quartz ampoule and provide treatment conditions that will allow the sublimation of intact, neutral Li@C₆₀ accompanied by a well-characterised component of neutral C₆₀. The decay of the material at appropriate temperatures can be modelled with the assumption of a second order decay process in the oven yielding Arrhenius parameters that can predict the ratio of Li@C₆₀ to C₆₀ in the sublimed material.

Graphical abstract

中文翻译：

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Li @ C 60的升华

摘要

探测内层富勒烯基本性质的实验通常需要制备分子束或中性分子的薄膜。干净地升华这类分子而不产生一些热降解是一项挑战。我们报告结合时探针的热衰减气相和扫描隧道显微镜研究商业[李⁺ C ^ ₆₀ ] PF ₆ ^-在石英安瓿，并提供处理条件，将允许完整的，中性Li的升华@ C_ ₆₀伴随中性C ₆₀的特征明确的成分。材料在适当温度下的衰变可以通过假设烤箱中的第二级衰变过程来建模，该过程会产生Arrhenius参数，该参数可以预测升华后的材料中Li C ₆₀与C ₆₀的比率。

图形概要