Revisiting the Disorder–Order Transition in 1‑X-Adamantane Plastic Crystals: Rayleigh Wing, Boson Peak, and Lattice Phonons

In this paper, we revisit the disorder–order transition in 1-chloro-adamantane and present new data on 1-bromo-adamantane. Rayleigh scattering and Raman-active optical lattice phonons are used to easily characterize the phase change. Unlike Cl-derivative, the Br-derivative shows a semiordered struct...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2021-04, Vol.125 (13), p.7384-7391
Main Authors: Salzillo, Tommaso, Girlando, Alberto, Brillante, Aldo
Format: Article
Language:English
Subjects:
C: Physical Properties of Materials and Interfaces
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Summary:In this paper, we revisit the disorder–order transition in 1-chloro-adamantane and present new data on 1-bromo-adamantane. Rayleigh scattering and Raman-active optical lattice phonons are used to easily characterize the phase change. Unlike Cl-derivative, the Br-derivative shows a semiordered structure in the vicinity of ambient P,T conditions, which is peculiar of this compound and seems to be due to a more reduced rotational disorder of the Br-derivative with respect to the other halogen-adamantanes. The semiordered phase is briefly discussed in terms of its Rayleigh Wing and Boson peak.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.1c00239