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Neon‐Bearing Ammonium Metal Formates: Formation and Behaviour under Pressure
Author(s) -
Collings Ines E.,
Bykova Elena,
Bykov Maxim,
Petitgirard Sylvain,
Hanfland Michael,
Paliwoda Damian,
Dubrovinsky Leonid,
Dubrovinskaia Natalia
Publication year - 2016
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201600854
Subject(s) - neon , argon , chemistry , metal , ammonium , inorganic chemistry , crystallography , organic chemistry
The incorporation of noble gas atoms, in particular neon, into the pores of network structures is very challenging due to the weak interactions they experience with the network solid. Using high‐pressure single‐crystal X‐ray diffraction, we demonstrate that neon atoms enter into the extended network of ammonium metal formates, thus forming compounds Ne x [NH 4 ][M(HCOO) 3 ]. This phenomenon modifies the compressional and structural behaviours of the ammonium metal formates under pressure. The neon atoms can be clearly localised within the centre of [M(HCOO) 3 ] 5 cages and the total saturation of this site is achieved after ∼1.5 GPa. We find that by using argon as the pressure‐transmitting medium, the inclusion inside [NH 4 ][M(HCOO) 3 ] is inhibited due to the larger size of the argon. This study illustrates the size selectivity of [NH 4 ][M(HCOO) 3 ] compounds between neon and argon insertion under pressure, and the effect of inclusion on the high‐pressure behaviour of neon‐bearing ammonium metal formates.