Электронный каталог

Статья

Nesvizhevsky, V.
Poly(Dicarbon Monofluoride) (C&sub(2)F)&sub(n) Bridges the Neutron Reflectivity Gap / V.Nesvizhevsky, E.Lychagin, A.Muzychka, A.Nezvanov, K.Turlybekuly, K.Zhernenkov, [a.o.] // Carbon [Electronic resource]. – 2024. – Vol. 227. – P. 119249. – URL: https://doi.org/10.1016/j.carbon.2024.119249. – Bibliogr.: 67.

Graphites covalently intercalated with fluorine to form (C&sub(2)F)&sub(n) structural type compounds shows a dramatic increase of the interlayer distance up to by a factor of almost 3 to reach ~9 Å. Such graphite fluoride compounds containing only carbon and fluorine offer the rare opportunity to bridge the so-called gap in the reflectivity of neutron reflectors. Slow neutron reflectors are of great interest in designing neutron sources as well as in fundamental and applied science; they require synthesizing high thermal and chemical compound stability graphite fluorides. In this work, a new strategy is proposed for synthesizing (C&sub(2)F)&sub(n) compounds in a wellcontrolled method. Our results show that the outcome (C&sub(2)F)&sub(n) has a covalent character with only sp*3 hybridized carbon atoms. Moreover, C–F bonds in the fluo rocarbon sheets and CF&sub(2) groups on the sheet edges lead to the desired stability and hydrophobic character. A dedicated home-made neutron diffractometer was built for measurements of double-differential neutron cross sections of crystals with specific large interlayer distances found in (C&sub(2)F)&sub(n) compounds. We demonstrate that the synthesized fluorine intercalated graphites developed effectively cover the gap in the reflectivity for the new generation of neutron reflectors.



Спец.(статьи,препринты) = С 348 е - Реакторные материалы (горючее, замедлитель, отражатель), конструкционные материалы (алюминий, цирконий, нержавеющая сталь)
ОИЯИ = ОИЯИ (JINR)2024
Бюллетени = 11/025