Low Temperature Physics: 42, 126 (2016); https://doi.org/10.1063/1.4942671
Fizika Nizkikh Temperatur: Volume 42, Number 2 (February 2016), p. 169-177    ( to contents , go back )

CO molecular impurity influence on fullerite C60 structural and thermodynamical properties in a wide range of sorption temperatures

V.V. Meleshko, I.V. Legchenkova, Y.E. Stetsenko, and A.I. Prokhvatilov

B. Verkin Institute for Low Temperature Physics and Engineering National Academy of Sciences of Ukraine 47 Nauki Ave., Kharkiv, 61103, Ukraine
E-mail: prokhvatilov@ilt.kharkov.ua
pos Анотація:

Received October 20, 2015

Abstract

The influence of CO sorption at pressure P = = 30 atm in temperature range 150–600 °С on fullerite C60 structural and thermodynamical properties researched by powder x-ray diffraction methods. Sorption kinetics investigated by construction of C60 lattice parameter dependences of CO molecules sorption time. At temperature Т > 300 °С CO molecules dissociation detected, which accompanied by carbonic powder precipitation and chemical interaction of atomic oxygen with C60 molecules, with CO and, probably, with carbonic condensate. These processes have a strong influence on fullerite’s C60 structural characteristics, that leads, particularly, to nonmonotonic lattice parameter and volume of matrix dependences from the impurity sorption temperature. At the physical sorption area a solid solutions concentrations established for С60(СО)х poly- and monoсrystalline samples at two sorption regimes (150 and 250 °С). The character of СО molecules influence on lattice parameter and orientational transition temperature of fullerite С60 defined to be linear.

PACS: 61.05.cp X-ray diffraction;
PACS: 71.20.Тх Fullerenes and related materials; intercalation compounds.

Key words: fullerite C60, x-ray diffractometry, intercalation of fullerite, sorption kinetic.

Published online: December 23, 2015

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