In situ monitoring of C60 hydrogenation

Abstract

Kinetics and pathways of C60 reaction with hydrogen gas were studied in a broad temperature interval and over extended periods of time. Specifically, hydrogenation was monitored in situ at high temperature and high hydrogen pressure conditions using gravimetric method. The shape of gravimetric curve was found to depend on hydrogena tion temperature: at 350-400ºC saturation of the sample weight was achieved, whereas at 420-440ºC the sample weight reached the maximum and decreased upon prolonged hydrogenation. The weight decrease is due to fullerene cage fragmentation with formation of light ydrocarbons evaporating from the sample. Hydrogenation products were studied by X-ray diffraction, APPI FT-ICR mass spectrometry, and elemental analysis. Hydrogenation pathways (from C60H18 up to C60H56) and possible mechanisms of hydrogenation-induced fragmentation of fulleranes are discussed. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20618