Observation of an incoherent thermally activated proton hopping process in calix-[4]-arene by means of anelastic spectroscopy

Details Observation of an incoherent thermally activated proton hopping process in calix-[4]-arene by means of anelastic spectroscopy Observation of an incoherent thermally activated proton hopping process in calix-[4]-arene by means of anelastic spectroscopy

2002-03-04

arxiv.org/abs/cond-mat/0203050v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.65.214304

The anelastic spectrum of calix[4]arene was measured at two different vibrational frequencies. Three thermally activated peaks were detected. The lowest temperature peak can be described considering a continous distribution function of activation energies for the relaxation. This anelastic peak can be ascribed to a thermally activated hopping process of H atoms of the OH groups, corresponding to a flip-flop of the OH bond. From the results of the present study, it seems that anelastic spectroscopy is a good experimental technique to study atomic motion inside molecules at a mesoscopic (few molecules) level.

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