ChemInform Abstract: High‐Pressure Synthesis and Characterization of the Alkali Diazenide Li₂N₂.

Abstract

Black powder of Li2N2 is prepared by decomposition of LiN3 in a Walker‐type multianvil assembly (9 GPa, 750 K, 50 min).

Simple Route to Metal cyclo-N5– Salt: High-Pressure Synthesis of CuN5

“…At 100 GPa, 1:1 is the most energetic composition of Na−N and Rb−N compounds among all the considered ratios of metal and nitrogen atoms. 14,15 For the Li− N system, below 10 GPa, Li 2 N 2 was synthesized from LiN 3 and was recovered upon complete pressure release, 16 and further studies indicate that Li 3 N has the lowest energy at 100 GPa. 12,13 It is necessary to rigidly control the synthesis conditions (reaction time, temperature, and pressure) and the ratio of metal and nitrogen because XN 5 does not have the lowest formation enthalpy compared to other compositions, which makes large-scale synthesis and application of metal N 5 − salts difficult.…”

Carbon Dioxide Capture with the Ozone-like Polynitrogen Molecule Li3N3

“…Another possibility is the use of polynitrogen systems, although they result in being very difficult to synthesize; e.g., only two years ago the first alkali diazine Li 2 N 2 was obtained by decomposition of LiN 3 under high pressure and temperature conditions. 18 In this regard, computational chemistry can be a powerful tool to guide the search for new polynitrogen materials.…”

“…Olson et al considered that this lithium triazenide Li 3 N 3 can be produced under rather specific experimental conditions, even containing the nonlinear ozone-like N 3 3− molecular motif. It is worth noting that the synthesis of the Li 3 N 3 system will be a complicated and challenging, but available, process, and in a similar way to the novel synthetic approach of the crystal structure of Li 2 N 2 18 it will require high pressure and high temperature conditions. The aim of this work is to suggest a first application of such a Li 3 N 3 species as a captor of CO 2 .…”