ChemInform Abstract: Phosphorus Nitride P3N5: Synthesis, Spectroscopic, and Electron Microscopic Investigations.

Abstract

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Synthesis, Short-Range Order Structure, and Thermal Properties of Mixed Oxy-sulfide Nitride (MOSN) Glasses

“…40 The two modes centered at 858 and 910 cm −1 are assigned to tetrahedra possessing at least one N t species and are notable compared to the other modes in the series. 39 Na 4 P 2 S 6 O. The MIR spectra of Na 4 P 2 S 6 O + N glasses are given in Figure S3 and reveal significant structural changes with ammonolysis times.…”

“…The first envelope spans from 400 to 750 cm −1 and contains several sharp modes centered at 495, 625, 673, and 710 cm −1 that have been assigned to the network bending δ(P−N) modes. 39,40,50 The second envelope spans from 750 to 1100 cm −1 and contains the stretching modes of the P−N t configurations. Three unique modes emerge within this envelope, with the most dominant band centered at 913 cm −1 and the less prominent modes centered at 856 and 974 cm −1 , which have not been specifically identified in the literature.…”

“…The mode observed at 905 cm −1 is in good agreement with ν(P− N t ) modes for crystalline P 3 N 5. 39 The broad ν as (P−O−P) mode of the P 1(O) species, centered at 964 cm −1 in the base glass, splits into two new modes at 990 and 950 cm −1 that are assigned to the ν(P−N t ) and ν as (P−O−P) modes, respectively. In the oxide O−P−O envelope, ranging from 1000 to 1400 cm −1 , the bands at 1050, 1100, and 1163 cm −1 have been assigned to the NBOs of the P 0 , P 1 , and P 2 oxide species.…”

“…Lastly, the ν as (PO) mode at 1250 cm −1 broadens with the incorporation of nitrogen and is attributed to the formation of ν as (P− N d ) species. 39,51 ■ DISCUSSION Nitrogen Analysis (N/P Determination). Alkali Metaphosphate Oxy-nitride Glasses (MPO 3-3y/2 N y ); [M = Li, Na, K ,etc....].…”

“…The increased chemical stability of N-doped oxide and oxysulfide glasses can be attributed to the P−N−P bonds that are formed in place of bridging oxygen (BO) P−O−P bonds, which prevent or dramatically slow oxidation, hydrolysis, and electrochemical reduction and oxidation below the glass transition temperature (T g ), when in contact with oxygen (air), water, alkali metal, and high voltage cathodes. 38,39,41 Munoz et al 42,43 observed that lithium phosphorus oxide (LiPO) glasses demonstrate improved nitrogen absorption with increasing modifier concentration, reaching the highest nitrogen concentration in the 0.6Li 2 O + 0.4P 2 O 5 composition. These authors reported that further additions of Li 2 O, however, severely decreased the number of BOs in the LiPO GSEs and thereby greatly reduced the number of available sites for nitrogen to occupy and, consequently, reduced the uptake of nitrogen.…”