We investigated two samples of Li6C60Hx, with different crystal structures, by means of anelastic and infrared spectroscopy. In both compounds the elastic energy loss does not display the relaxation peak, which in pure fullerene was attributed to the rotations of the buckyballs between energetically nearly-equivalent positions. We suggest that the disappearance of the relaxation process is due to bonding between bucicyballs. The optical density of both specimens show new phonon lines appearing in the mid-infrared range, which in the previous literature were found in polymerized fullerenes. The results obtained by means of both spectroscopies clearly indicate the presence of chemical bonding between C-60 molecules in the Li6C60Hx, independently of their crystal structure. (C) 2013 Elsevier B.V. All rights reserved.
A spectroscopic investigation of hydrogenated Li doped fullerane / A., Paolone; O., Palumbo; Leardini, Fabrice; R., Cantelli; D. A., Knight; J. A., Teprovich Jr; R., Zidan. - In: JOURNAL OF ALLOYS AND COMPOUNDS. - ISSN 0925-8388. - ELETTRONICO. - 580:1(2013), pp. S67-S69. [10.1016/j.jallcom.2013.03.162]
A spectroscopic investigation of hydrogenated Li doped fullerane
LEARDINI, FABRICE;
2013
Abstract
We investigated two samples of Li6C60Hx, with different crystal structures, by means of anelastic and infrared spectroscopy. In both compounds the elastic energy loss does not display the relaxation peak, which in pure fullerene was attributed to the rotations of the buckyballs between energetically nearly-equivalent positions. We suggest that the disappearance of the relaxation process is due to bonding between bucicyballs. The optical density of both specimens show new phonon lines appearing in the mid-infrared range, which in the previous literature were found in polymerized fullerenes. The results obtained by means of both spectroscopies clearly indicate the presence of chemical bonding between C-60 molecules in the Li6C60Hx, independently of their crystal structure. (C) 2013 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
