Liquid Ammonia

Lagowski, J. J.

doi:10.1080/15533170601187474

Cited by 36 publications

(35 citation statements)

References 298 publications

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“…[5][6][7][8][9][10][11][12][13][14] Once an alkali metal is dissolved in liquid ammonia, it immediately dissociates to give separated entities with unlike charges: the solvated ions and electrons. Many experiments have been performed and a large volume of experimental data have been accumulated ͑for a review, see Refs.…”

Section: Introductionmentioning

confidence: 99%

Nature of the metal–nonmetal transition in metal–ammonia solutions. I. Solvated electrons at low metal concentrations

Chuev

Quemerais

Crain

2007

The Journal of Chemical Physics

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Using a theory of polarizable fluids, we extend a variational treatment of an excess electron to the many-electron case corresponding to finite metal concentrations in metal-ammonia solutions (MAS). We evaluate dielectric, optical, and thermodynamical properties of MAS at low metal concentrations. Our semianalytical calculations based on a mean-spherical approximation correlate well with the experimental data on the concentration and temperature dependencies of the dielectric constant and the optical absorption spectrum. The properties are found to be mainly determined by the induced dipolar interactions between localized solvated electrons, which result in the two main effects: the dispersion attractions between the electrons and a sharp increase in the static dielectric constant of the solution. The first effect creates a classical phase separation for the light alkali metal solutes (Li, Na, K) below a critical temperature. The second effect leads to a dielectric instability, i.e., polarization catastrophe, which is the onset of metallization. The locus of the calculated critical concentrations is in a good agreement with the experimental phase diagram of Na-NH(3) solutions. The proposed mechanism of the metal-nonmetal transition is quite general and may occur in systems involving self-trapped quantum quasiparticles.

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Section: Introductionmentioning

confidence: 99%

Nature of the metal–nonmetal transition in metal–ammonia solutions. I. Solvated electrons at low metal concentrations

Chuev

Quemerais

Crain

2007

The Journal of Chemical Physics

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“…A small amount of deuterated standard (2.5%) such as DMSO-d 6 , toluene-d 8 , or benzene-d 6 was also added to the solution to provide a the deuterium lock, the solution was transferred into a pressure NMR tube, and the NMR spectrum was recorded in a Bruker 500 MHz NMR (125 MHz for carbon) instrument.…”

Section: Ionisation Of Amines Carbon Acids By Nmr Studymentioning

confidence: 99%

The kinetics and mechanisms of organic reactions in liquid ammonia

Atherton

Page

2010

Faraday Discuss.

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“…12,13 Liquid ammonia is an exotic but versatile solvent that can be used in organic and inorganic reactions. [14][15][16] Its ability to dissolve alkaline and alkaline earth metals makes it especially interesting for reduction reactions. 16 Solutions of alkaline metals have been used by Watt et al to react various transition metal salts and oxides.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Iron Nitride, ε-Fe₃N: Preparation from Liquid Ammonia and Magnetic Properties

et al. 2017

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e-Fe 3 N shows interesting magnetism but is difficult to obtain as a pure and single-phase sample. We report a new preparation method using the reduction of iron(II) bromide with elemental sodium in liquid ammonia at -78 °C, followed by annealing at 573 K. Nanostructured and monophasic oxygen-free iron nitride, e-Fe 3 N, is produced according to X-ray diffraction and transmission electron microscopy experiments. The magnetic properties between 2 K and 625 K were characterized using a vibrating sample magnetometer, revealing soft ferromagnetic behavior with a low-temperature average moment of 1.5 µ B /Fe and a Curie temperature of 500 K. T C is lower than that of bulk e-Fe 3 N (575 K), 1 which corresponds well with the small particle size within the agglomerates (15.4 (± 4.1) nm according to TEM, 15.8(1) according to XRD). Samples were analyzed before and after partial oxidation (Fe 3 N-Fe x O y core-shell nanoparticles with a 2-3 nm thick shell) by X-ray diffraction, transmission electron microscopy, electron energy-loss spectroscopy and magnetic measurements. Both the pristine Fe 3 N nanoparticles and the oxidized core-shell particles showed shifting and broadening of the magnetic hysteresis loops upon cooling in a magnetic field.

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Liquid Ammonia

Cited by 36 publications

References 298 publications

Nature of the metal–nonmetal transition in metal–ammonia solutions. I. Solvated electrons at low metal concentrations

Nature of the metal–nonmetal transition in metal–ammonia solutions. I. Solvated electrons at low metal concentrations

The kinetics and mechanisms of organic reactions in liquid ammonia

Nanoscale Iron Nitride, ε-Fe₃N: Preparation from Liquid Ammonia and Magnetic Properties

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Liquid Ammonia

Cited by 36 publications

References 298 publications

Nature of the metal–nonmetal transition in metal–ammonia solutions. I. Solvated electrons at low metal concentrations

Nature of the metal–nonmetal transition in metal–ammonia solutions. I. Solvated electrons at low metal concentrations

The kinetics and mechanisms of organic reactions in liquid ammonia

Nanoscale Iron Nitride, ε-Fe3N: Preparation from Liquid Ammonia and Magnetic Properties

Contact Info

Product

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Nanoscale Iron Nitride, ε-Fe₃N: Preparation from Liquid Ammonia and Magnetic Properties