Luminescence of Molecular Nitrogen Nanoclusters Containing Stabilized Atoms

Abstract

We studied the luminescence of molecular nitrogen nanoclusters containing stabilized nitrogen, oxygen, hydrogen, and deuterium atoms. Optical spectra were observed during the destruction of these ensembles of nanoclusters accompanied by a rapid release of chemical energy stored in the samples. Several interesting features were observed including a broad band near λ ≈ 360 nm, which was identified as emission corresponding to 2A→1A transition of N(D) polymeric nitrogen. Also the sharp lines at λ ∼ 336 and 473 nm were observed, and their assignments to ND radicals are discussed.

Synthesis of nanoclusters and quasy one-dimensional structures in glow discharge at T ≈ 2 K

“…On the other hand, nanoclusters could be formed in cold helium gas by aggregation of fragments of either acrylic glue or cellulose sputtered from clay. Growth of nanoclusters in ultracold (T ∼ 1 K) afterglow plasma as well as deposition of electric discharge products on cold (T < 10 K) surface allow to obtain high energy density materials containing huge concentrations of stabilised radicals (including polynitrogen and polycarbon molecules) [36,[47][48][49]. Very unusual processes were observed upon injection of impurity atoms, molecules and nanoparticles into superfluid helium: the injected particles were very efficiently collected by quantized vortices and aggregation of impurity particles was greatly accelerated within these linear topological defects.…”

Studies of charging mechanisms in impurity-helium condensates by means of impedance spectroscopy and current spectroscopy

“…The α-and δ-groups of N atoms correspond to the transitions 2 D-4 S and 2 P-2 D. The β-group of O atoms matches to the transition 1 S-1 D. Some additional features have been observed in the spectrum of the most intense flash during the sample destruction. The band at 360 nm has been recently attributed to polynitrogen molecule N 4[15]. The bands at 291, 307, and 323 nm correspond to the well known transitions of the β-system of NO molecules.…”

“…N , N , N , N , N , were detected and studied in solid nitrogen films and nanoclusters [5][6][7][8][9][10][11][12][13][14][15]. A cation + 5 N has been synthesized as a part of compound [16,17].…”

Enhancing Stability in Polynitrogen Compounds: Mechanisms and Strategies

“…At present, the explosive energy of traditional CHNO explosive is only two times TNT equivalent, which is close to the theoretical limit and difficult to significantly improve. , Compared to traditional energetic materials, polynitrogen compounds have advantages with high density, high enthalpy of formation, ultrahigh energy, and clean and pollution-free detonation products. Therefore, they have the hope to apply as a new generation of ultrahigh energy energetic materials. − A polynitrogen compound represented by a pentazolate anion was successfully synthesized in 2017, and pentazolate salts can stably exist at room temperature. − In contrast to the pentazolate anion, the study of other polynitrogen compounds has remained in theoretical studies and experimental synthesis under extreme conditions such as ultrahigh temperature and ultrahigh pressure. − Only an azide anion and a pentazolate anion were synthesized and stabilized under general reaction conditions, while the synthesis of neutral polynitrogen compounds has not yet been resolved. , The main reason is that feasible synthetic routes for neutral polynitrogen compounds are extremely challenging. The risk of forming transition metal azides and pentazolate salts is too high, particularly.…”