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Journal articles on the topic 'Ammonia molecule'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Hannongbua, S. "A Molecular Dynamics Simulation of the Structure of Sodium Ion in Liquid Ammonia." Australian Journal of Chemistry 44, no. 3 (1991): 447. http://dx.doi.org/10.1071/ch9910447.

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The structural properties of Na1/ammonia solution have been studied by means of a molecular dynamics simulation, the experimental density of pure liquid ammonia being used. In contrast to the previous study for the lithium ion in liquid ammonia, a free orientation of the ammonia molecules in the first solvation shell of the sodium ion has been found. The effects of elevated temperature on the structure function of the cationic solvation shell could be observed clearly i.e., an increase in temperature leads to significant changes in molecular orientation and an increase in the average dipole mo

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2

TACHIKAWA, MASANORI, and MOTOYUKI SHIGA. "AB INITIO PATH INTEGRAL STUDY ON ISOTOPE EFFECT OF AMMONIA MOLECULE." Journal of Theoretical and Computational Chemistry 04, no. 01 (2005): 175–81. http://dx.doi.org/10.1142/s0219633605001337.

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We have applied ab initio path integral molecular dynamics simulation to study the quantum feature and proton/deuteron isotope effect of ammonia molecule. This method treats all the rotational and vibrational degrees of freedom fully quantum mechanically, while the potential energies of the respective molecular configurations are calculated "on the fly" using ab initio quantum chemical approach. The differences on the geometry and the electronic structure between NH 3 and ND 3 molecules are investigated in detail.

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3

Louarn, Essyllt, Abdoul Monem Asri-Idlibi, Julien Leprovost, Michel Héninger, and Hélène Mestdagh. "Evidence of Reactivity in the Membrane for the Unstable Monochloramine during MIMS Analysis." Sensors 18, no. 12 (2018): 4252. http://dx.doi.org/10.3390/s18124252.

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Membrane Inlet Mass Spectrometry (MIMS) was used to analyze monochloramine solutions (NH2Cl) and ammonia solutions in a compact FTICR. Chemical ionization enables identification and quantification of the products present in the permeate. The responses of protonated monochloramine and ammonium increase linearly with the solution concentration. The enrichments were respectively 1.2 and 5.5. Pervaporation is dependent on pH and only the basic form of ammonia NH3 pervaporates through the membrane. Unexpectedly, the small ammonia molecule permeated very slowly. It could be due to interactions with

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4

Bartlett, R. "Ammonia: the prototypical lone pair molecule." Journal of Molecular Structure: THEOCHEM 400, no. 1-2 (1997): 157–68. http://dx.doi.org/10.1016/s0166-1280(97)00047-x.

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5

Bartlett, Rodney J., Janet E. Del Bene, S. Ajith Perera, and ReneéPeloquin Mattie. "Ammonia: the prototypical lone pair molecule." Journal of Molecular Structure: THEOCHEM 400 (July 1997): 157–68. http://dx.doi.org/10.1016/s0166-1280(97)90277-3.

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6

Davis, Stephen C., Peter J. Derrick, and Christoph Ottinger. "Cross-Section for Proton Transfer from a Large Peptide Ion to Ammonia in the Gas Phase." Zeitschrift für Naturforschung A 45, no. 9-10 (1990): 1151–57. http://dx.doi.org/10.1515/zna-1990-9-1012.

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Abstract Proton transfer between ions of the cyclic peptide valinomycin (relative molecular mass 1110.6) and ammonia molecules has been studied over a range of ion energies from 50 eV to 8 keV. Valinomycin ions were produced by field desorption. Collisions of valinomycin ions with ammonia molecules at controlled energies were carried out using an ion-optical lens system situated in the source region of a large research mass spectrometer. The maximum cross-section for proton transfer occurred when the valinomycin ion possessed 1500 eV of kinetic energy. This maximum cross-sec-tion for proton tr

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7

Grzimek, Veronika, and Juraj Kuchár. "Synthesis, properties and crystal structure of novel Copper(II) ammine complex with [Pd(CN)4]2− building blocks." Zeitschrift für Kristallographie - Crystalline Materials 235, no. 10 (2020): 459–63. http://dx.doi.org/10.1515/zkri-2020-0033.

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AbstractThe title compound [Cu4(NH3)12-(µ2-CN)8-Pd4(CN)8] was prepared from the aqueous solution Cu2+ – N,N,N′,N′-tetraethylethane-1,2-diamine – [Pd(CN)4]2−, where the addition of excess amounts of ammonia caused the dissolution of the precipitate formed during reaction. Using this method, we prepared and structurally characterized the new complex of Cu(II) containing ammine ligand with tetracyanidopalladate(II) anion incorporated within the molecule. The crystal structure of compound is molecular; the unit cell contains centrosymmetric octanuclear molecules in which all central atoms lies on

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8

Almatarneh, Mansour H., Shefa’ F. Alrebei, Mohammednoor Altarawneh, Yuming Zhao, and Abd Al-Aziz Abu-Saleh. "Computational Study of the Dissociation Reactions of Secondary Ozonide." Atmosphere 11, no. 1 (2020): 100. http://dx.doi.org/10.3390/atmos11010100.

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This contribution presents a comprehensive computational study on the reactions of secondary ozonide (SOZ) with ammonia and water molecules. The mechanisms were studied in both a vacuum and the aqueous medium. All the molecular geometries were optimized using the B3LYP functional in conjunction with several basis sets. M06-2X, APFD, and ωB97XD functionals with the full basis set were also used. In addition, single-point energy calculations were performed with the G4MP2 and G3MP2 methods. Five different mechanistic pathways were studied for the reaction of SOZ with ammonia and water molecules.

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9

Loukonen, V., T. Kurtén, I. K. Ortega, et al. "Enhancing effect of dimethylamine in sulfuric acid nucleation in the presence of water – a computational study." Atmospheric Chemistry and Physics Discussions 10, no. 2 (2010): 2321–56. http://dx.doi.org/10.5194/acpd-10-2321-2010.

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Abstract. We have studied the hydration of sulfuric acid – ammonia and sulfuric acid – dimethylamine clusters using quantum chemistry. We calculated the formation energies and thermodynamics for clusters of one ammonia or one dimethylamine molecule together with 1–2 sulfuric acid and 0–5 water molecules. The results indicate that dimethylamine enhances the addition of sulfuric acid to the clusters much more efficiently than ammonia when the number of water molecules in the cluster is either zero, or greater than two. Further hydrate distribution calculations reveal that practically all dimethy

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10

Loukonen, V., T. Kurtén, I. K. Ortega, et al. "Enhancing effect of dimethylamine in sulfuric acid nucleation in the presence of water – a computational study." Atmospheric Chemistry and Physics 10, no. 10 (2010): 4961–74. http://dx.doi.org/10.5194/acp-10-4961-2010.

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Abstract. We have studied the hydration of sulfuric acid – ammonia and sulfuric acid – dimethylamine clusters using quantum chemistry. We calculated the formation energies and thermodynamics for clusters of one ammonia or one dimethylamine molecule together with 1–2 sulfuric acid and 0–5 water molecules. The results indicate that dimethylamine enhances the addition of sulfuric acid to the clusters much more efficiently than ammonia when the number of water molecules in the cluster is either zero, or greater than two. Further hydrate distribution calculations reveal that practically all dimethy

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11

Wu, Zhi Ying, and Nan Nan Gai. "Independent Component Analysis of Multiple-Component Gaseous Photoacoustic Spectroscopy to Determine Feature Absorption." Advanced Materials Research 518-523 (May 2012): 1544–51. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.1544.

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A blind source separation model out of statistical information principle is applied to “decode” multi-gas photoacoustic spectroscopy from mixing signal into a couple of single independent component based on samples from a given detection experiment and A FastICA algorithm with used in the mode is introduced to separate the spectroscopy of low molecule mass by a feature extraction or to track that of higher-mass volatile molecule by a pattern recognition, such as acetone or its similar-species molecules. The research has exhibited its glamour by successfully extracting ammonia feature absorptio

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12

Ma, Chunli, Fangfei Li, Qiang Zhou, et al. "Ammonia molecule rotation of pressure-induced phase transition in ammonia hemihydrates 2NH3·H2O." RSC Advances 2, no. 11 (2012): 4920. http://dx.doi.org/10.1039/c2ra01156e.

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13

Kemper, Paul R., and Michael T. Bowers. "Internal energy effects in ion-molecule reactions: ammonia(1+) + molecular deuterium." Journal of Physical Chemistry 90, no. 3 (1986): 477–81. http://dx.doi.org/10.1021/j100275a025.

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14

Kupiainen, O., I. K. Ortega, T. Kurtén, and H. Vehkamäki. "Amine substitution into sulfuric acid – ammonia clusters." Atmospheric Chemistry and Physics Discussions 11, no. 11 (2011): 30853–75. http://dx.doi.org/10.5194/acpd-11-30853-2011.

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Abstract. The substitution of ammonia by dimethylamine in sulfuric acid – ammonia – dimethylamine clusters was studied using a collision and evaporation dynamics model. Quantum chemical formation free energies were computed using B3LYP/CBSB7 for geometries and frequencies and RI-CC2/aug-cc-pV(T+d)Z for electronic energies. We first demonstrate the good performance of our method by a comparison with an experimental study investigating base substitution in positively charged clusters, and then continue by simulating base exchange in neutral clusters, which cannot be measured directly. Collisions

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15

Kupiainen, O., I. K. Ortega, T. Kurtén, and H. Vehkamäki. "Amine substitution into sulfuric acid – ammonia clusters." Atmospheric Chemistry and Physics 12, no. 8 (2012): 3591–99. http://dx.doi.org/10.5194/acp-12-3591-2012.

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Abstract. The substitution of ammonia by dimethylamine in sulfuric acid – ammonia – dimethylamine clusters was studied using a collision and evaporation dynamics model. Quantum chemical formation free energies were computed using B3LYP/CBSB7 for geometries and frequencies and RI-CC2/aug-cc-pV(T+d)Z for electronic energies. We first demonstrate the good performance of our method by a comparison with an experimental study investigating base substitution in positively charged clusters, and then continue by simulating base exchange in neutral clusters, which cannot be measured directly. Collisions

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16

Hannongbua, S., S. Kokpol, Z. Gurskii, and K. Heinzinger. "Cluster Formation in a Concentrated Lithium-Liquid Ammonia Solution. A Monte Carlo Study." Zeitschrift für Naturforschung A 52, no. 11 (1997): 828–34. http://dx.doi.org/10.1515/zna-1997-1111.

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Abstract Results of a Monte Carlo study of a lithium-liquid ammonia solution at 240 K are reported. The basic cube contained 135 Li+ and 1025 NH3 . With an experimental density of 0.554 g/cm3 a side-length of 37.89 Å resulted. The pseudopotential theory is employed, which permits the exclusion of the electrons from an explicit consideration. The structure of the solution is described by various site-site radial distribution functions. The six ammonia molecules in the first solvation shell of the lithium ion are arranged octahedrally. Clusters are formed which consist almost exclusively of two

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17

Jänchen, Jochen, Vladimir Penchev, Elke Löffler, Barbara Parlitz, and Helmut Stach. "Influence of Silicon Content and Nature of the Template Molecule on Physico-Chemical and Catalytic Properties of SAPO-5." Collection of Czechoslovak Chemical Communications 57, no. 4 (1992): 826–35. http://dx.doi.org/10.1135/cccc19920826.

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Two series of SAPO-5 molecular sieves were synthesized: (i) Using tripropylamine as a template and varying the Si content in the gel, and (ii) varying the template molecule at constant silicon content in the gel. The products were characterized physico-chemically and tested in toluene disproportionation. It was found that the rising silica content in the synthesis gel has only little influence on the SiO2 incorporation into the SAPO. Investigation of the acid character revealed that the concentrations of the adsorbed ammonia molecules are nearly constant and independent of the total silicon co

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18

Haller, Ivan. "Ion-molecule reactions in the silane-ammonia system." Journal of Physical Chemistry 94, no. 10 (1990): 4135–37. http://dx.doi.org/10.1021/j100373a047.

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19

Peifer, William R., M. Todd Coolbaugh, and James F. Garvey. "Ion-molecule chemistry within triply charged ammonia clusters." Journal of Physical Chemistry 93, no. 12 (1989): 4700–4703. http://dx.doi.org/10.1021/j100349a004.

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20

David, Carl W. "IR Vibration-Rotation Spectra of the Ammonia Molecule." Journal of Chemical Education 73, no. 1 (1996): 46. http://dx.doi.org/10.1021/ed073p46.

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21

Coolbaugh, M. Todd, William R. Peifer, and James F. Garvey. "Ion-molecule chemistry within doubly charged ammonia clusters." Chemical Physics Letters 156, no. 1 (1989): 19–23. http://dx.doi.org/10.1016/0009-2614(89)87073-3.

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22

Avilova, Marta M., Ekaterina A. Mar'yeva, Olga V. Popova, and Tat'yana G. Ivanova. "MOLECULAR MODELING OF ADSORPTION OF POLLUTANT GASES ON CADMIUM-CONTAINING POLYACRYLONITRILE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 4 (2020): 49–54. http://dx.doi.org/10.6060/ivkkt.20206304.6008.

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The paper presents theoretical studies of the adsorption of pollutant gases on the surface of cadmium-containing polyacrylonitrile (Cd-polyacrylonitrile) in the absence and presence of water molecules and oxygen molecules in the environment. The list of gases to which the Cd-polyacrylonitrile surface may have the highest sensitivity is determined. Nitrogen dioxide, methane, ammonia, sulfur oxide (II), hydrogen sulfide, ozone, carbon monoxide, carbon oxide (II), chlorine were chosen as pollutant gases. The following software packages are used for modeling: HyperChem, Gaussian 09, Сhemoffice 201

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23

Reimers, Jeffrey R., Ante Bilić, Zheng-Li Cai, et al. "Molecular Electronics: From Basic Chemical Principles to Photosynthesis to Steady-State Through-Molecule Conductivity to Computer Architectures." Australian Journal of Chemistry 57, no. 12 (2004): 1133. http://dx.doi.org/10.1071/ch04132.

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Molecular electronics offers many possibilities for the development of electronic devices beyond the limit of silicon technology. Its basic ideas and history are reviewed, and a central aspect of the delocalization of electrons across molecules and junctions is examined. Analogies between key processes affecting steady-state through-molecule conduction and equilibrium geometric and spectroscopic properties of paradigm molecules, such as hydrogen, ammonia, benzene, and the Creutz–Taube ion are drawn, and the mechanisms by which control can be exerted over molecular-electronic processes during b

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24

Rashev, Svetoslav, Lyubo Tsonev, and Dimo Zhechev. "Complex symmetrized calculations on ammonia vibrational levels." Open Chemistry 3, no. 3 (2005): 556–69. http://dx.doi.org/10.2478/bf02479282.

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AbstractThis paper introduces a fully symmetrized Hamiltonian formalism designed for description of vibrational motion in ammonia (and any XH3 molecule). A major feature of our approach is the introduction of complex basis vibrational wavefunctions in product form, satisfying the complex symmetry species (CSS) of the molecular symmetric top point group (D 3h). The described formalism for ammonia is an adaptation of the approach, previously developed and applied to benzene, based on the CSS of the point group D 6h. The molecular potential energy surface (PES) is presented in the form of a Taylo

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25

Sun, Yan-Qiu, Xu Wang, Feng-Yang Bai, and Xiu-Mei Pan. "Theoretical study of the hydrolysis of HOSO+NO2 as a source of atmospheric HONO: effects of H2O or NH3." Environmental Chemistry 14, no. 1 (2017): 19. http://dx.doi.org/10.1071/en16080.

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Environmental contextNitrous acid (HONO) has long been recognized as an important atmospheric pollutant, with the reaction of HOSO+NO2 being a source of HONO. We explore the effects of an additional water or ammonia molecule on this reaction. Calculations show that the ammonia molecule has a more effective role than the water molecule in assisting the reaction. AbstractDepending on different ways that NO2 approaches the HOSO radical, the main reactant complexes HOS(O)NO2 and HOS(O)ONO–L (lowest energy structure of the isomer) were revealed by Lesar et al. (J. Phys. Chem. A 2011, 115, 11008), a

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26

Zabel, H., and D. A. Neumann. "Neutron scattering studies of potassium-ammonia layers in graphite." Canadian Journal of Chemistry 66, no. 4 (1988): 666–71. http://dx.doi.org/10.1139/v88-115.

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Neutron scattering investigations of the structural and dynamical properties of ammonia molecules in the stage 1 compound KC24(NH3)4.3 are discussed. The K–NH3 intercalate layers represent the two-dimensional analogue of the well-known metal–ammonia solutions. At room temperature the intercalate liquid structure factor can be described by a model in which the K ions are surrounded on the average by four NH3 molecules, and the remaining molecules are essentially free. Quasi-elastic neutron scattering revealed two independent rotational motions of the NH3 molecule, one associated with the rotati

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27

Sitnitsky, A. E. "Analytic description of inversion vibrational mode for ammonia molecule." Vibrational Spectroscopy 93 (November 2017): 36–41. http://dx.doi.org/10.1016/j.vibspec.2017.09.003.

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28

Mella, Massimo, and E. Curotto. "Quantum simulations of the hydrogen molecule on ammonia clusters." Journal of Chemical Physics 139, no. 12 (2013): 124319. http://dx.doi.org/10.1063/1.4821648.

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29

Douvropoulos, Theodosios G. "Positive width function and energy indeterminacies in ammonia molecule." International Journal of Quantum Chemistry 107, no. 8 (2007): 1673–87. http://dx.doi.org/10.1002/qua.21243.

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30

Morris, Michael, Pierre Thibault, and Robert K. Boyd. "Low-energy ion/molecule products from collisions with ammonia." Rapid Communications in Mass Spectrometry 7, no. 12 (1993): 1136–40. http://dx.doi.org/10.1002/rcm.1290071216.

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31

Ma, Yandong, Hao Jin, Ying Dai, and Baibiao Huang. "Study of ammonia molecule adsorbing on diamond (100) surface." Applied Surface Science 256, no. 13 (2010): 4136–41. http://dx.doi.org/10.1016/j.apsusc.2010.01.097.

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32

Pan, Luning, Shiliang Ding, and Conghao Deng. "Multiphoton excitation of an ammonia molecule in laser fields." Science in China Series B: Chemistry 40, no. 6 (1997): 583–89. http://dx.doi.org/10.1007/bf02875476.

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33

Ozturk, Hilmi, Hakki Nazli, Korkut Yegin, and Mehmet Sezgin. "Detection of Ammonia in Liquids Using Millimeter Wave Spectroscopy." International Journal of Photoenergy 2012 (2012): 1–4. http://dx.doi.org/10.1155/2012/362084.

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Detection of ammonia plays a vital role for counter-bioterrorism applications. Using millimeter wave absorption measurements, ammonia dissolved in water solution is analyzed and compared to water-only solution. The inversion of ammonia molecule results in split rotational spectral lines and transitions of these lines can be detected. Two-port measurements were carried out with vector network analyzer and measurements revealed that ammonia presence can be identified, especially between 30–35 GHz.

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34

Huang, Shuang, Xin Wu, and Peixing Li. "Diffusion behaviors of liquid ammonia in the cellulose based on molecular dynamics simulation." International Journal of Clothing Science and Technology 31, no. 5 (2019): 705–14. http://dx.doi.org/10.1108/ijcst-12-2018-0163.

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Purpose In the textile industry, liquid ammonia treatment is an important way to modify the structure of natural fibers. The purpose of this paper is to reveal the diffusion behaviors of liquid ammonia in cellulose. Design/methodology/approach To analysis the diffusion behaviors of liquid ammonia in cellulose, the cellulose model and the system of ammonia and cellulose are built. Infrared spectrum is carried out to test the model of cellulose, which is found to agree with experiment. Diffusion coefficients, free volume and hydrogen bonds are discussed to explain diffusion behaviors. Findings T

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35

Kurtén, T., V. Loukonen, H. Vehkamäki, and M. Kulmala. "Amines are likely to enhance neutral and ion-induced sulfuric acid-water nucleation in the atmosphere more effectively than ammonia." Atmospheric Chemistry and Physics 8, no. 14 (2008): 4095–103. http://dx.doi.org/10.5194/acp-8-4095-2008.

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Abstract. We have studied the structure and formation thermodynamics of dimer clusters containing H2SO4 or HSO4− together with ammonia and seven different amines possibly present in the atmosphere, using the high-level ab initio methods RI-MP2 and RI-CC2. As expected from e.g. proton affinity data, the binding of all studied amine-H2SO4 complexes is significantly stronger than that of NH3•H2SO4, while most amine-HSO4− complexes are only somewhat more strongly bound than NH3•HSO4−. Further calculations on larger cluster structures containing dimethylamine or ammonia together with two H2SO4 mole

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36

Kurtén, T., V. Loukonen, H. Vehkamäki, and M. Kulmala. "Amines are likely to enhance neutral and ion-induced sulfuric acid-water nucleation in the atmosphere more effectively than ammonia." Atmospheric Chemistry and Physics Discussions 8, no. 2 (2008): 7455–76. http://dx.doi.org/10.5194/acpd-8-7455-2008.

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Abstract. We have studied the structure and formation thermodynamics of dimer clusters containing H2SO4 or HSO4− together with ammonia and seven different amines possibly present in the atmosphere, using the high-level ab initio methods RI-MP2 and RI-CC2. As expected from e.g. proton affinity data, the binding of all studied amine – H2SO4 complexes is significantly stronger than that of NH3•H2SO4, while most amine – HSO4− complexes are only somewhat more strongly bound than NH3•HSO4−. Further calculations on larger cluster structures containing dimethylamine or ammonia together with two H2SO4

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37

Wójcik, Leszek, and Krzysztof Bederski. "High pressure investigation of ion/molecule reactions in mixtures of ammonia and argon, and pure ammonia." International Journal of Mass Spectrometry and Ion Processes 127 (August 1993): 11–16. http://dx.doi.org/10.1016/0168-1176(93)87074-3.

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38

ZABARDASTI, ABEDIEN, SAEID AMANI, MARYAM SALEHNASSAJ, and ALI H. KIANFARD. "THEORETICAL STUDY OF HYDROGEN BONDED CLUSTERS OF AMMONIA AND FULMINIC ACID." Journal of Theoretical and Computational Chemistry 07, no. 02 (2008): 277–86. http://dx.doi.org/10.1142/s021963360800368x.

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Ab initio and density functional calculations are used to analyze the interaction between a molecule of fulminic acid with one, two, three, and four molecules of ammonia along with a 2:2 complex at B3LYP/6-311++G(d, p) and MP2/6-311++G(d, p) computational levels. Cooperative effect (CE) in terms of stabilization energy of clusters is calculated and discussed as well. For the studied clusters, the CE is increased with increasing cluster size. Red shifts of H – C stretching frequency for complexes involving HCNO as H -donor are predicted. Atom in molecules is used to analyze the cooperative effe

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39

Brown, Martyn A., Jesus A. Castro, Bruce R. McGarvey, and Dennis G. Tuck. "A complex of gallium with a Schiff base - bis(orthoquinone) ligand." Canadian Journal of Chemistry 77, no. 4 (1999): 502–10. http://dx.doi.org/10.1139/v99-052.

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The electrochemical oxidation of gallium in a cell containing a solution of 3,5-di-tert-butylcatechol (H2dbc) in a mixture of liquid ammonia and diethyl ether gives rise to the complex Ga(dbqdi)2, where dbqdi is a tridentate ligand formed by the condensation of two molecules of H2dbc and ammonia. The same paramagnetic molecule can be prepared by treating GaCl3 with H2dbc in ethanol with concentrated aqueous ammonia, with subsequent aerial oxidation. The crystal parameters are triclinic, space group P[Formula: see text], a = 11.6140(8), b = 12.3415(9), c = 20.765(1) Å, α = 89.491(1)°, β = 74.28

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40

Wang, Chang, Shaochong Lei, Xin Li, et al. "A Reduced GO-Graphene Hybrid Gas Sensor for Ultra-Low Concentration Ammonia Detection." Sensors 18, no. 9 (2018): 3147. http://dx.doi.org/10.3390/s18093147.

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A hybrid structure gas sensor of reduced graphene oxide (RGO) decorated graphene (RGO-Gr) is designed for ultra-low concentration ammonia detection. The resistance value of the RGO-Gr hybrid is the indicator of the ammonia concentration and controlled by effective charge transport from RGO to graphene after ammonia molecule adsorption. In this hybrid material, RGO is the adsorbing layer to catch ammonia molecules and graphene is the conductive layer to effectively enhance charge/electron transport. Compared to a RGO gas sensor, the signal-to-noise ratio (SNR) of the RGO-Gr is increased from 22

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41

Stry, James J., M. Todd Coolbaugh, Edward Turos, and James F. Garvey. "Novel ion-molecule reactions of fullerene dication (C602+) with ammonia." Journal of the American Chemical Society 114, no. 20 (1992): 7914–16. http://dx.doi.org/10.1021/ja00046a049.

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42

Michel, R., and D. Stalke. "Challenges in small-molecule XRD – alkali metal organics from ammonia." Acta Crystallographica Section A Foundations of Crystallography 68, a1 (2012): s214. http://dx.doi.org/10.1107/s0108767312095852.

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43

Wesdemiotis, C., M. Y. Zhang, and F. W. McLafferty. "Distinctive ion-molecule reactions of C4H+4 isomers with ammonia." Organic Mass Spectrometry 26, no. 7 (1991): 671–72. http://dx.doi.org/10.1002/oms.1210260714.

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44

Grützmacher, Hans-Friedrich, and Michael Büchner. "Ion/Molecule Reactions of Isomeric Bromobutene Radical Cations with Ammonia." European Journal of Mass Spectrometry 10, no. 1 (2004): 21–26. http://dx.doi.org/10.1255/ejms.622.

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45

Pfeifer, Joschka, Mario Simon, Martin Heinritzi, et al. "Measurement of ammonia, amines and iodine compounds using protonated water cluster chemical ionization mass spectrometry." Atmospheric Measurement Techniques 13, no. 5 (2020): 2501–22. http://dx.doi.org/10.5194/amt-13-2501-2020.

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Abstract. Here we describe the design and performance of a new water cluster chemical ionization–atmospheric pressure interface time-of-flight mass spectrometer (CI-APi-TOF). The instrument selectively measures trace gases with high proton affinity such as ammonia and dimethylamine, which are important for atmospheric new particle formation and growth. Following the instrument description and characterization, we demonstrate successful measurements at the CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber where very low ammonia background levels of ∼4 pptv were achieved (at 278 K and 80 % R

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Redant, Sebastien, Xavier Beretta-Piccoli, Aude Mugisha, et al. "Hyperammonemia, the Last Indication of High-Volume Hemodiafiltration in Adult and Children: A Structured Review." Blood Purification 48, no. 4 (2019): 330–35. http://dx.doi.org/10.1159/000501390.

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Ammonia is a neurotoxic molecule that causes cerebral edema and encephalopathy. Ammonia is either produced in excess or poorly purified during severe hepatic insufficiency, poisoning, infection, and inborn errors of metabolism. During continuous renal replacement therapy, ammonia clearance is determined by the dialysate flow rate and the dialyzer surface area. Extra-renal blood purification for ammonia clearance has been studied in neonates with urea cycle disorders. Prognostic factors affecting patient outcome are thought to be the duration of coma, the patient’s clinical status prior to dial

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Qureshi, Saima, Noorhana Yahya, Chong Fai Kait, Bilal Alqasem, Zia ur Rehman та Muhammad Irfan. "Enhanced Catalytic Activity of α-Fe₂O₃ with the Adsorption of Gases for Ammonia Synthesis". Materials Science Forum 880 (листопад 2016): 15–18. http://dx.doi.org/10.4028/www.scientific.net/msf.880.15.

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Ab initio density functional theory employed to study the adsorption of hydrogen and nitrogen gas molecule on the α-Fe2O3 (111) surface for ammonia synthesis. The calculated adsorption energy is-4.70kcal/mol, -4.60kcal/mol,-4.38kcal/mol and-3.77kcal/mol for different orientations of adsorbed gas molecules and shows that system is stable and gas molecules have adsorbed. It can also be seen with adsorption of gas molecules the net spin of hematite enhanced from 0 to 2 hence confirms the activity of hematite surface. Hematite nanowires synthesized by oxidation method. Raman spectrum analyses demo

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Chakraborty, Dipayan, Aranya Giri, and Dhananjay Nandi. "Dissociation dynamics in low energy electron attachment to ammonia using velocity slice imaging." Physical Chemistry Chemical Physics 21, no. 39 (2019): 21908–17. http://dx.doi.org/10.1039/c9cp03973b.

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Fan, Li Sha, Yan Zhen Yu, and Zhen Liang Liu. "Silicon Based Compound Filter Material Strengthening A/O Bio-Filter Denitrification Performance." Advanced Materials Research 830 (October 2013): 28–32. http://dx.doi.org/10.4028/www.scientific.net/amr.830.28.

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The static absorption capacity of ammonia nitrogen on Silicon based compound filter material can be as high as 149.9048 mg/g, it’s the interactive effect of silica based compound filter material physical adsorption and single molecule layer absorption. Denitrification of sewage in the system can be finished through ion-exchange properties and adsorption effect together under the function of kinds of microbe co-degradation.Not only Hypoxia column does happen the traditional denitrification role, but also a new type of anaerobic ammonium oxidation denitrification happens.

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Wang, Bin, Ying Zhang, Fu Bo Gu, Min Zuo, and Guang Sheng Guo. "Acid Strength Measurement of Zeolites by the TPD-IR Technique with Ammonia as Probe Molecule." Applied Mechanics and Materials 475-476 (December 2013): 1270–74. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1270.

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An improved TPD-IR technique was developed recently. By which means, acid properties of Brønsted acid sites on HY zeolite and SAPO-34 zeolite were studied by an advanced TPD-IR technique with ammonia as probe molecule. Desorption activation energy (DAE) of the probe molecule adsorbed on zeolite was used as a measure of the acid strength. The result indicates the Brønsted acid sites of HY Zeolite or SAPO-34 zeolite were divided into two types with the strength of DAE of ammonia 43.4KJ/mol, 24.4KJ/mol and 33.2KJ/mol, 20.5KJ/mol. It is concluded that HY zeolite has the stronger Brønsted acid site

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