An evaporation study of C76 by Knudsen cell mass spectrometry

• Published in: Rapid communications in mass spectrometry Vol. 12; no. 15; pp. 1028 - 1030
• Main Authors: Boltalina, Olga V., Markov, Vitaliy Yu, Borschevskii, Andrey Ya, Sidorov, Lev N., Bezmelnitsin, Valery N., Eletskii, Alexander V., Taylor, Roger
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 15.08.1998
• ISSN: 0951-4198; 1097-0231
• DOI: 10.1002/(SICI)1097-0231(19980815)12:15<1028::AID-RCM271>3.0.CO;2-V

The vapour pressure of pure C76 and its sublimation enthalpy have been determined by Knudsen cell mass spectrometry in the temperature range 637–911 K. The temperature–pressure equation is ln p(Pa) =­(−22 806 ± 820)/T(K) + (24.52 ± 1.08). The mean sublimation enthalpy at 764 K is (190 ± 7) kJ/mol. This value is lower than that, (222 ± 17) kJ/mol, determined by us previously from a mixture of higher fullerenes,1 confirming further that the mixture of higher fullerenes is not an ideal solid solution. © 1998 John Wiley & Sons, Ltd.