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Journal articles on the topic 'Oxygen and sodium nuclei structure'

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Published: 4 June 2021

Last updated: 4 February 2022

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1

Bosáček, Vladimír, Stanislav Vratislav, and Mája Dlouhá. "Bridging Methoxy Groups in NaY, NaX and NaLSX Zeolites." Collection of Czechoslovak Chemical Communications 69, no. 8 (2004): 1537–52. http://dx.doi.org/10.1135/cccc20041537.

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Distribution of chemisorbed methyl groups and sodium cations in the structure of NaY, NaX and NaLSX zeolites was estimated by neutron diffraction. Chemisorbed methyl groups were prepared in the structure by reaction of methyl iodide with reactive sodium cations available in SII and SIII positions of faujasites. Methyl cations CH3+, formed in the reaction, react immediately with the lattice oxygen forming surface bonded methyl groups in bridging configuration. 13C NMR signals of chemisorbed surface species and their linear dependence on the intermediate electronegativity of the zeolite lie in t

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2

Starratt, Alvin N., Edmund W. B. Ward та J. B. Stothers. "Coprinolone and Δ6-coprinolone: new sesquiterpenes from Coprinus psychromorbidus". Canadian Journal of Chemistry 67, № 3 (1989): 417–27. http://dx.doi.org/10.1139/v89-065.

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The structure of coprinolone (1), an oxygen-bridged protoilludane from the W2 isolate of the fungus Coprinuspsychromorbidus, has been elucidated by chemical transformations and detailed 1H and 13C magnetic resonance studies, including homo- and heteronuclear correlation spectra. The 1H–1H coupling data and nuclear Overhauser difference spectra for 1 and derived isomers led to the establishment of its stereochemistry. A second metabolite was identified as Δ6-coprinolone (20) by spectroscopic results. Confirmatory evidence in support of the structures was obtained from the labelling patterns of

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3

Wolfe, Saul, Raymond John Bowers, Hee-Sook Shin, Chang-Kook Sohn, Donald Fredric Weaver, and Kiyull Yang. "Phenceptin: a biomimetic model of the phenytoin receptor." Canadian Journal of Chemistry 66, no. 11 (1988): 2751–62. http://dx.doi.org/10.1139/v88-425.

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5,5-Diphenylhydanytoin (phenytoin) is the most widely used anticonvulsant drug, but has many side effects. Although its chemical mode of action is unknown, phenytoin is believed to function primarily by interference with the transport of sodium ions across the neuronal membrane. Structure–activity and lipophilicity–activity studies suggest that the drug interacts with its receptor through hydrogen bonding to the N3—C4 amide bond, and an aromatic–aromatic interaction with the C5 substituent. Since sodium channels are cysteine-rich peptides, whose function depends upon the cysteine[Formula: see

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4

Dickson, R. S., and J. A. Weil. "The magnetic properties of the oxygen-hole aluminum centres in crystalline SiO2. IV. [AlO4/Na]+." Canadian Journal of Physics 68, no. 7-8 (1990): 630–42. http://dx.doi.org/10.1139/p90-094.

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The centre [AlO4/Na]+, formed in α-quartz by X irradiation at 77 K, contains an aluminum ion substituted for a silicon ion, with an electron hole on a nearest-neighbor oxygen ion, and an interstitial sodium ion, which acted as a charge compensator before loss of the electron. Electron paramagnetic resonance spectra of this centre at 35 K have yielded spin-Hamiltonian nuclear quadrupole and hyperfine parameter matrices [Formula: see text], Ā(23Na), and [Formula: see text], in addition to matrices [Formula: see text] and Ā(27Al) more accurate than those measured previously. The line width anisot

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5

Yan, Lu, and Fan Ping. "Synthesis and Study of 4, 4-12-12 Alkyl Phenol Polyoxyethylene Sulfonate Gemini Surfactant." Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering) 12, no. 4 (2019): 262–74. http://dx.doi.org/10.2174/2405520412666190723112325.

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Background: Gemini surfactants have good prospect of application development in various fields for their superior performance in foaming, wettability, and emulsification with lower critical micelle concentration (CMC) than conventional mono-surfactants. Objective: The purpose of this study was to synthesize an ionic sulfonate Gemini surfactant, which is mainly used as an oil flooding agent, to improve oil recovery and reduce oil production cost. Methods: With 4-dodecyl phenol, diethylene glycol and triethylene glycol as the raw materials to synthesize two sulfonate Gemini surfactants. The sing

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6

Stefanovsky, Sergey V., Andrey A. Shiryaev, Michael B. Remizov, Elena A. Belanova, Pavel A. Kozlov, and Boris F. Myasoedov. "Valence and Local Environment of Molybdenum in Aluminophosphate Glasses for Immobilization of High Level Waste from Uranium-Graphite Reactor Spent Nuclear Fuel Reprocessing." MRS Proceedings 1744 (2015): 73–78. http://dx.doi.org/10.1557/opl.2015.299.

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ABSTRACTTwo Mo-bearing glasses considered as candidate forms for high level waste (HLW) a uranium-graphite reactor spent nuclear fuel (SNF) reprocessing were characterized. Incorporation of Mo in sodium aluminophosphate (SAP) glass increases its tendency to devitrification with segregation of orthophosphate phases. Valence state and local environment of Mo in the materials containing ∼2 wt.% MoO3 were determined by X-ray absorption fine structure (XAFS) spectroscopy. In the quenched samples composed of major vitreous and minor AlPO4 nearly all Mo is located in the vitreous phase as [Mo6+О6] un

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7

Berry, David Eric, Kathryn Anne Beveridge, Jane Browning, Gordon William Bushnell та Keith Roger Dixon. "Ligand properties of phosphinito platinum complexes: 31P and 195Pt nuclear magnetic resonance studies and the crystal and molecular structure of [Cl(Et3P)Pt(μ-PPh2O)2Pt(PEt3)2][BF4]". Canadian Journal of Chemistry 64, № 9 (1986): 1903–11. http://dx.doi.org/10.1139/v86-314.

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Reaction of sodium hydride in tetrahydrofuran with the hydrogen-bonded phosphinito complex, [PtCl(PEt3){(PPh2O)2H}], gives a solution of the salt, [PtCl(PEt3){(PPh2O)2Na}], which is a precusor to synthesis of other bimetallic derivatives, [PtCl(PEt3){(μ-PPh2O)2Q}]n+: n = 0, Q = Rh(COD) or Ir(COD); n = 1, Q = Pd(PEt3)2 or Pt(PEt3)2. Detailed 31P and 195Pt nmr studies are reported for these and related examples including a titanium complex (n = 0, Q = Ti(acac)Cl2) synthesised by direct reaction of [PtCl(PEt3){(PPh2O)2H}] with [TiCl2(acac)2]. The diplatinurn complex, [Cl(PEt3)Pt(μ-PPh2O)2Pt(PEt3)

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8

Caurant, Daniel, Arnaud Quintas, Odile Majérus, Thibault Charpentier, and I. Bardez. "Structural Role and Distribution of Alkali and Alkaline-Earth Cations in Rare Earth-Rich Aluminoborosilicate Glasses." Advanced Materials Research 39-40 (April 2008): 19–24. http://dx.doi.org/10.4028/www.scientific.net/amr.39-40.19.

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The structure of a seven oxide aluminoborosilicate simplified nuclear glass, bearing a high amount of neodymium or lanthanum oxide (16 wt%), alkali and alkaline earth cations is studied. Nd3+ or La3+ are supposed to simulate the trivalent lanthanides and minor actinides present in nuclear wastes. In the studied glass composition, lanthanide ions have a modifying role and are located in highly depolymerized regions of the structure as shown by neodymium optical absorption and EXAFS spectroscopies. Both alkali and alkaline earth cations are present around Nd3+ ions enabling their stabilization i

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9

Lee, Sung Keun, George D. Cody, Yingwei Fei, and Bjorn O. Mysen. "Oxygen-17 Nuclear Magnetic Resonance Study of the Structure of Mixed Cation Calcium−Sodium Silicate Glasses at High Pressure: Implications for Molecular Link to Element Partitioning between Silicate Liquids and Crystals." Journal of Physical Chemistry B 112, no. 37 (2008): 11756–61. http://dx.doi.org/10.1021/jp804458e.

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10

Kappaun, Karine, Anne H. S. Martinelli, Valquiria Broll, et al. "Soyuretox, an Intrinsically Disordered Polypeptide Derived from Soybean (Glycine Max) Ubiquitous Urease with Potential Use as a Biopesticide." International Journal of Molecular Sciences 20, no. 21 (2019): 5401. http://dx.doi.org/10.3390/ijms20215401.

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Ureases from different biological sources display non-ureolytic properties that contribute to plant defense, in addition to their classical enzymatic urea hydrolysis. Antifungal and entomotoxic effects were demonstrated for Jaburetox, an intrinsically disordered polypeptide derived from jack bean (Canavalia ensiformis) urease. Here we describe the properties of Soyuretox, a polypeptide derived from soybean (Glycine max) ubiquitous urease. Soyuretox was fungitoxic to Candida albicans, leading to the production of reactive oxygen species. Soyuretox further induced aggregation of Rhodnius prolixu

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11

Stetsuk, Ye V., O. Ye Akimov, and A. V. Mischenko. "ROLE OF THE REACTIVE OXYGEN AND NITROGEN SPECIES IN THE DEVELOPMENT OF FIBROSIS IN THE TESTES OF RATS WITH PROLONGED CENTRAL DEPRIVATION OF TESTOSTERONE SYNTHESIS." Актуальні проблеми сучасної медицини: Вісник Української медичної стоматологічної академії 20, no. 2 (2020): 175–81. http://dx.doi.org/10.31718/2077-1096.20.2.175.

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Prostate cancer is the second most common diagnosis in oncology and ranks the fifth among the causes of mortality in men around the world. 1,276,106 cases of newly diagnosed prostate cancer were recorded in 2018. Androgens play a large role in the development of prostate cancer. Elimination of androgens and blockade of their synthesis are key pathogenetic steps in the treatment of prostate cancer. Metabolic and morphological changes in the testes under prolonged central deprivation of testosterone synthesis are currently not well understood. The aim of this study was to establish the role of r

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12

Lyutostansky, Yu S. "Disturbance of the shell structure of neutron-rich nuclei in the oxygen-magnesium region." Bulletin of the Russian Academy of Sciences: Physics 73, no. 2 (2009): 176–79. http://dx.doi.org/10.3103/s1062873809020099.

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13

Krawczyk, Marta S., and Irena Majerz. "The Na—O bond in sodium fenamate." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 75, no. 5 (2019): 766–74. http://dx.doi.org/10.1107/s2052520619009065.

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The one-dimensional polymeric structure of sodium diaquafenamate–water (1/1) was studied by X-ray diffraction. The sodium cation is coordinated to one oxygen atom of the carboxylate group and to four water oxygen atoms. To characterize the Na—O bonds, the quantum theory of atoms in molecules (QTAIM) and noncovalent interaction (NCI) approaches have been used. Both methods confirmed that the Na—O bonds are very weak, comparable with the weak N—H...O intramolecular hydrogen bond. The polymeric structure is stabilized by the interaction of the sodium cation with the surrounding water molecules.

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14

He, Mingfu, Kah Chun Lau, Xiaodi Ren, et al. "Concentrated Electrolyte for the Sodium-Oxygen Battery: Solvation Structure and Improved Cycle Life." Angewandte Chemie 128, no. 49 (2016): 15536–40. http://dx.doi.org/10.1002/ange.201608607.

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15

He, Mingfu, Kah Chun Lau, Xiaodi Ren, et al. "Concentrated Electrolyte for the Sodium-Oxygen Battery: Solvation Structure and Improved Cycle Life." Angewandte Chemie International Edition 55, no. 49 (2016): 15310–14. http://dx.doi.org/10.1002/anie.201608607.

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16

Ha, N. T. T., N. V. Hong, and P. K. Hung. "Distribution of sodium and dynamical heterogeneity in sodium silicate liquid." International Journal of Modern Physics B 33, no. 05 (2019): 1950013. http://dx.doi.org/10.1142/s0217979219500139.

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The structural and dynamical properties in sodium silicate liquid were investigated by molecular dynamics method. To clarify the distribution of sodium atoms in model, characteristics of simplex have been investigated. The simulation results reveal that Na2O⋅4SiO2 (NS4) liquid has a lot of simplexes with four sodium atoms inside but about half of simplexes do not have sodium. The spatial distribution of sodium is nonuniform, sodium tends to be in the nonbridging oxygen-simplexes and in larger-radius simplex. Moreover, the sodium density for nonbridging oxygen region is significantly higher tha

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17

Kaduk, James A., Amy M. Gindhart, and Thomas N. Blanton. "Crystal structure of cloxacillin sodium monohydrate, C19H17ClN3O5SNa(H2O)." Powder Diffraction 34, no. 4 (2019): 374–78. http://dx.doi.org/10.1017/s0885715619000678.

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The crystal structure of cloxacillin sodium monohydrate has been solved and refined using synchrotron X-ray powder diffraction data and optimized using density functional techniques. Cloxacillin sodium monohydrate crystallizes in space group P212121 (#19) with a = 7.989 36(12), b = 10.918 09(10), c = 25.559 3(6) Å, V = 2229.50(5) Å3, and Z = 4. The crystal structure is characterized by corner-sharing chains of irregular NaO5 polyhedra along the a-axis. The carboxylate group chelates to the Na and bridges two Na cations. The coordination sphere is completed by the water molecule and a carbonyl

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18

Pal, M. "Structure and physical properties of sodium antimony germanate glasses." Journal of Materials Research 11, no. 7 (1996): 1831–35. http://dx.doi.org/10.1557/jmr.1996.0231.

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The structure and physical properties of sodium antimony germanate glasses with compositions 10Na2O − xSb2O3 − (90 − x)GeO2, x = 10−30 mol%, prepared by the melt-quenched route have been studied. It is observed from x-ray diffraction, SEM, density and oxygen molar volume, infrared (IR), differential thermal analysis (DTA), and optical absorption that single phase homogeneous glasses with a random network structure can be obtained in this system. The strength and connectivity of the glass network increase with GeO2 content. The main Ge−O stretching vibration also shifts to higher wavelength sid

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19

Olimov, Kosim, Khusniddin K. Olimov, Sagdulla L. Lutpullaev, et al. "Breakup of 16O nucleus onto C and He isotopes by protons at incident momentum of 3.25AGeV/c." International Journal of Modern Physics E 25, no. 03 (2016): 1650023. http://dx.doi.org/10.1142/s0218301316500233.

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Phenomenological analysis of breakup of oxygen nuclei on fragments with charges two and six in collisions with protons at [Formula: see text][Formula: see text]GeV/[Formula: see text] was conducted using the Monte Carlo (MC) model of isotropic phase space. For the first time, the contributions of mechanism of diffractive breakup of oxygen nucleus, and that of quasi elastic knocking out of one of the [Formula: see text] clusters of oxygen nucleus by a proton target, into channel of formation of [Formula: see text] particle and [Formula: see text]C nucleus with conservation of recoil proton were

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20

Haines, Alan H., and David L. Hughes. "Crystal structure of sodium (1S)-D-lyxit-1-ylsulfonate." Acta Crystallographica Section E Crystallographic Communications 72, no. 5 (2016): 628–31. http://dx.doi.org/10.1107/s2056989016005375.

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The title compound, Na+·C5H11O8S−[systematic name: sodium (1S,2S,3S,4R)-1,2,3,4,5-pentahydroxypentane-1-sulfonate], is formed by reaction of D-lyxose with sodium bisulfite (sodium hydrogen sulfite) in water. The anion has an open-chain structure in which one of the oxygen atoms of the sulfonate residue, the S atom, the C atoms of the sugar chain and the O atom of the hydroxymethyl group form an essentially planar zigzag chain with the corresponding torsion angles lying between 179.80 (11) and 167.74 (14)°. A three-dimensional bonding network exists in the crystal structure involving hexacoordi

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21

Baster, Dominika, Krzysztof Dybko, Michał Szot, Konrad Świerczek, and Janina Molenda. "Sodium intercalation in Na CoO2− — Correlation between crystal structure, oxygen nonstoichiometry and electrochemical properties." Solid State Ionics 262 (September 2014): 206–10. http://dx.doi.org/10.1016/j.ssi.2013.11.040.

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22

Guesmi, Abderrahmen, Massimo Nespolo, and Ahmed Driss. "Synthesis, crystal structure and charge distribution of Na7As11O31: An oxygen-deficient layered sodium arsenate." Journal of Solid State Chemistry 179, no. 8 (2006): 2466–71. http://dx.doi.org/10.1016/j.jssc.2006.04.010.

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23

Calhorda, Maria Jose, and Roald Hoffmann. "Dimensionality and metal-metal and metal-oxygen bonding in the sodium niobate (NaNb3O6) structure." Journal of the American Chemical Society 110, no. 25 (1988): 8376–85. http://dx.doi.org/10.1021/ja00233a015.

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24

Yuan, Cenxi. "Systematic shell-model study on spectroscopic properties from light to heavy nuclei." EPJ Web of Conferences 178 (2018): 02016. http://dx.doi.org/10.1051/epjconf/201817802016.

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A systematic shell-model study is performed to study the spectroscopic properties from light to heavy nuclei, such as binding energies, energy levels, electromagnetic properties, and β decays. The importance of cross-shell excitation is shown in the spectroscopic properties of neutron-rich boron, carbon, nitrogen, and oxygen isotopes. A special case is presented for low-lying structure of 14C. The weakly bound effect of proton 1s1/2 orbit is necessary for the description of the mirror energy difference in the nuclei around A=20. Some possible isomers are predicted in the nuclei in the southeas

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25

Plane, J. M. C. "The role of sodium bicarbonate in the nucleation of noctilucent clouds." Annales Geophysicae 18, no. 7 (2000): 807–14. http://dx.doi.org/10.1007/s00585-000-0807-2.

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Abstract. It is proposed that a component of meteoric smoke, sodium bicarbonate (NaHCO3), provides particularly effective condensation nuclei for noctilucent clouds. This assertion is based on three conditions being met. The first is that NaHCO3 is present at sufficient concentration (±104 cm-3) in the upper mesosphere between 80 and 90 km. It is demonstrated that there is strong evidence for this based on recent laboratory measurements coupled with atmospheric modelling. The second condition is that the thermodynamics of NaHCO3(H2O)n cluster formation allow spontaneous nucleation to occur und

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26

Loub, Josef, Zdeněk Mička, Jana Podlahová, Karel Malý, and Jürgen Kopf. "Structure of Sodium Hydrogen Selenite-Selenious Acid Adduct (1:3), NaHSeO3.3H2SeO3." Collection of Czechoslovak Chemical Communications 57, no. 11 (1992): 2309–14. http://dx.doi.org/10.1135/cccc19922309.

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Structure of sodium hydrogen selenite-selenious acid (1:3) was solved by heavy-atom method and refined anisotropically to R = 0.098 for 1223 unique observed reflections. The title compound crystallizes in the Pc space group with a = 5.756(2), b = 4.911(2), c = 20.010(5) Å, β = 100.48(3)°, V = 556(1) Å3, T = 293 K, (a = 5.763(2), b = 4.878(1), c = 20.03(1) Å, β = 100.48(3)°, V = 554(1) Å3, T = 173 K), Z = 2. The structure consist of HSeO3- anions, molecules of selenious acid and Na+ cations which are octahedrally coordinated with oxygen atoms. The structure is stabilized by a system of hydrogen

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27

Tirkkonen, B., A. Aukrust, E. Couture, et al. "Physicochemical characterisation of mangafodipir trisodium." Acta Radiologica 38, no. 5 (1997): 780–89. http://dx.doi.org/10.1080/02841859709172411.

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Purpose: To determine the structure and various physicochemical properties of man-gafodipir (MnDPDP) trisodium, the active ingredient of Teslascan, a new organ-specific contrast medium for MR imaging. Material and Methods: The structure of MnDPDP trisodium crystals was determined by X-ray crystallography. The possible existence of polymorphism in MnDPDP trisodium was evaluated by powder X-ray diffraction, optical microscopy, thermal analysis and IR spectroscopy. In addition, various spectroscopic techniques and physicochemical measurements were used for characterisation of MnDPDP trisodium. Re

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28

Runciman, WA, B. Srinivasan, and S. Saebo. "Electronic Structure of the Principal Uranium Centre in Alkali Fluorides." Australian Journal of Physics 39, no. 4 (1986): 555. http://dx.doi.org/10.1071/ph860555.

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Fluorescent centres are formed when hexavalent uranium is incorporated into lithium fluoride and sodium fluoride in an oxygen atmosphere. The principal centre is believed to consist of a UOsF group. Calculations have been made of the electronic structure of this centre assuming that the excited states are due to charge transfer transitions. Different models are considered and fitting procedures used to find parameters yielding good agreement with the energy levels and 9 values of the seven lowest excited states of the centre in sodium fluoride. A similar model is believed to be applicable to t

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29

Siidra, Oleg I., Evgeny V. Nazarchuk, Dmitry O. Charkin, et al. "Open-framework sodium uranyl selenate and sodium uranyl sulfate with protonated morpholino-N-acetic acid." Zeitschrift für Kristallographie - Crystalline Materials 234, no. 2 (2019): 109–18. http://dx.doi.org/10.1515/zkri-2018-2103.

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Abstract The reaction of sodium N-morpholine acetate with selenic and sulfuric acid and uranyl nitrate results in the formation of two novel open-framework compounds, |Na(Hmfa)|[(UO2)2(SeO4)3(H2O)](H2O)2 (NaUSe) and [Na2(SO3OH)(Hmfa)]|(UO2)(SO4)2| (NaUS), respectively. Despite identical synthetic procedures, sulfate structure dramatically differs from selenate compound. Their common feature is an open-framework featuring two-dimensional system of channels occupied by protonated morpholino-N-acetic acid species. Coordination of Na atoms is different. In NaUSe, [(UO2)2 (SeO4)3(H2O)]2− layers are

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30

Gonzalez, Diana, Joseph T. Golab, James A. Kaduk, Amy M. Gindhart, and Thomas N. Blanton. "Crystal structure of pantoprazole sodium sesquihydrate Form I, C16H14F2N3O4SNa(H2O)1.5." Powder Diffraction 35, no. 1 (2020): 53–60. http://dx.doi.org/10.1017/s0885715620000019.

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The crystal structure of pantoprazole sodium sesquihydrate has been solved and refined using synchrotron X-ray powder diffraction data and optimized using density functional techniques. Pantoprazole sodium sesquihydrate crystallizes in space group Pbca (#61) with a = 33.4862(6), b = 17.29311(10), c = 13.55953(10) Å, V = 7852.06(14) Å3, and Z = 16. The crystal structure is characterized by layers parallel to the bc-plane. One layer contains the Na coordination spheres. The two independent sodium ions are trigonal bipyramidal and octahedral. The NaO3N2 and NaO4N2 coordination spheres share an ed

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31

Litton, David A., and Stephen H. Garofalini. "Atomistic Structure of Sodium and Calcium Silicate Intergranular Films in Alumina." Journal of Materials Research 14, no. 4 (1999): 1418–29. http://dx.doi.org/10.1557/jmr.1999.0192.

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Sodium silicate intergranular films (IGF) in contact with the [0001] basal plane of α-alumina were studied using the molecular dynamics computer simulation technique. The results were compared to previous simulations of calcium silicate and sol-gel silica IGF's in contact with alumina. An ordered, cagelike structure was observed at the interface. Sodium ions segregated to the cages at the interfaces. Calcium and hydrogen ions were also observed to segregate to the cages in the previous simulations. The modifier ions were surrounded by more oxygen ions in the cages at the interface than in the

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32

Shtokvysh, O., L. Koval, V. Dyakonenko та V. Pekhnyo. "STRUCTURE OF THE ZINC COMPLEX WITH CYCLOHEXYL AСETOACETATE". Bulletin of Taras Shevchenko National University of Kyiv. Chemistry, № 1 (57) (2020): 66–69. http://dx.doi.org/10.17721/1728-2209.2020.1(57).16.

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Binuclear complex of Zn(II) with cyclohexyl acetoacetate was obtained and structurally characterized for the first time. According to structural data, the crystal system is triclinic, space group P-1; a = 7.6530(4), b = 12.2412(8), c = 12.9102(9) Å; α = 90.198(5), β = 101.071(5), γ = 96.937(5) deg. The molecular structure corresponds to the formula [Zn2(C10H15O3)4(C2H5OH)2]. The complex is located in a special position to the symmetry center of the unit cell. The coordination polyhedrons of the Zn atoms are the same distorted octahedrons formed by six oxygen atoms. Each formed by 4 oxygen atom

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33

Müller, Kerstin, Klaus-Jürgen Range, and Anton M. Heyns. "Alkalimetallformiate, V Die Kristallstruktur von Natriumformiat-Dihydrat, NaHCO2·2H2O [1] Alkali Metal Formates, V The Crystal Structure of Sodium Formate Dihydrate, NaHCO2·2H2O [1]." Zeitschrift für Naturforschung B 49, no. 9 (1994): 1179–82. http://dx.doi.org/10.1515/znb-1994-0905.

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Single crystals of sodium formate dihydrate, NaHCO2·2H2O, have been prepared from aqueous solutions of sodium formate, NaHCO2, via the trihydrate, NaHCO2-3H2O. They are orthorhombic, space group Cmca, with a = 7.070(4), b = 14.534(2), c = 8.706(2) Å and Z = 8. The structure, including the hydrogen atoms, was refined to R = 0.054, Rw = 0.065 for 479 unique reflections with I > 3 σ (I). It comprises buckled layers formed by NaO6 octahedra which are edge- and corner-sharing. The octahedral coordination of the sodium ions is achieved by two oxygen atoms from two different end-on bonded formate

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34

Sharma, Himanshu, and Divya S. Sharma. "Detection of Hydroxyl and Perhydroxyl Radical Generation from Bleaching Agents with Nuclear Magnetic Resonance Spectroscopy." Journal of Clinical Pediatric Dentistry 41, no. 2 (2017): 126–34. http://dx.doi.org/10.17796/1053-4628-41.2.126.

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Objective: Children/adolescent's orodental structures are different in anatomy and physiology from that of adults, therefore require special attention for bleaching with oxidative materials. Hydroxyl radical (OH.) generation from bleaching agents has been considered directly related to both its clinical efficacy and hazardous effect on orodental structures. Nonetheless bleaching agents, indirectly releasing hydrogen peroxide (H2O2), are considered safer yet clinically efficient. Apart from OH., perhydroxyl radicals (HO2.) too, were detected in bleaching chemistry but not yet in dentistry. Ther

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35

Bott, RC, DS Sagatys, DE Lynch, G. Smith, and CHL Kennard. "The Preparation and Crystal Structure of Polymeric Anhydrous Sodium Hydrogen o-Phenylenedioxydiacetate." Australian Journal of Chemistry 45, no. 5 (1992): 947. http://dx.doi.org/10.1071/ch9920947.

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The crystal structure of anhydrous sodium hydrogen o-phenylenedioxydiacetate , [Na2( Hbdda )2]n, has been determined by X-ray methods and refined to a residual R 0.031 for 1234 observed reflections. Crystals are monoclinic, space group C2/c with Z 4 in a cell of dimensions a 18.415(6), b 7.4667(7), c 16.354(7) � ,β112.61(2)�. The dimeric repeating unit has two centrosymmetrically related pentagonal pyramidal Na-O6 complex centres [Na-0, 2.272-2.439(2) � ] bridged by carboxylate oxygens. The pentagonal plane comprises four oxygens from the Hbdda ligand as well as one providing the bridging link

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36

Shcherbakova, Irina V., Evghenii V. Kuznetsov, Iosif A. Yudilevich, et al. "2-benzopyrylium salts. XXXVII. Oxygen analogs of reissert compounds : molecular structure and reactions with sodium hydroxide." Tetrahedron 44, no. 19 (1988): 6217–24. http://dx.doi.org/10.1016/s0040-4020(01)89812-4.

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37

Klaeui, W., A. Mueller, W. Eberspach, R. Boese, and I. Goldberg. "Crystal structure and coordination chemistry of the pentane-soluble sodium salt of an oxygen tripod ligand." Journal of the American Chemical Society 109, no. 1 (1987): 164–69. http://dx.doi.org/10.1021/ja00235a025.

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38

Olimov, Kosim, Sagdulla L. Lutpullaev, Khusniddin K. Olimov, et al. "Some peculiarities of formation of 4He nuclei in 16Op collisions at 3.25A GeV/c." International Journal of Modern Physics E 23, no. 12 (2014): 1450086. http://dx.doi.org/10.1142/s0218301314500864.

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The new experimental data on dependences of the mean multiplicities and kinematical characteristics of 4 He nuclei, formed in 16 O p collisions at 3.25A GeV/c, on degree of excitation of the fragmenting nucleus are presented. It is shown that the initial (α cluster) structure of oxygen nucleus is retained at small excitation levels. It is established that the kinematical characteristics of 1 H , 2 H , 3 H and 3 He fragments do not depend on availability or absence of α particles in a collision event, which indicates the independence of mechanisms of formation of such fragments and 4 He nuclei.

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39

Gamag, e., e. Gamag, BM Peake, BM Peake, J. Simpson, and J. Simpson. "X-Ray Crystal Structure Determination of Some Sodium Anthraquinone Sulfonate Derivatives." Australian Journal of Chemistry 46, no. 10 (1993): 1595. http://dx.doi.org/10.1071/ch9931595.

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The crystal structures of sodium 9,10-dioxo-9,10-dihydroanthracene-2-sulfonate hydrate (1) and sodium 9,10-dioxo-9,10-dihydroanthracene-1,5-disulfonate trihydrate (2) have been determined by single-crystal X-ray diffraction at 253 K and refined to R 0.03 for (1) (1535 reflections) and R 0.04 for (2) (1409 reflections). Crystals of (1) are monoclinic, P21, a 17.395(5), b 6.625(2), c 5.537(1)Ǻ, β 91.87(2)°, Z 2, and those of (2) are orthorhombic, Pnma, a 11.332(4), b 20.048(5), c 7.634(3)Ǻ, Z 4. The results of molecular mechanics calculations on these two molecules were in general agreement with

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40

Benhsina, Elhassan, Jamal Khmiyas, Said Ouaatta, Abderrazzak Assani, Mohamed Saadi, and Lahcen El Ammari. "Synthesis and crystal structure of NaCuIn(PO4)2." Acta Crystallographica Section E Crystallographic Communications 76, no. 3 (2020): 366–69. http://dx.doi.org/10.1107/s2056989020001929.

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Single crystals of sodium copper(II) indium bis[phosphate(V)], NaCuIn(PO4)2, were grown from the melt under atmospheric conditions. The title phosphate crystallizes in the space group P21/n and is isotypic with KCuFe(PO4)2. In the crystal, two [CuO5] trigonal bipyramids share an edge to form a dimer [Cu2O8] that is connected to two PO4 tetrahedra. The obtained [Cu2P2O12] units are interconnected through vertices to form sheets that are sandwiched between undulating layers resulting from the junction of PO4 tetrahedra and [InO6] octahedra. The two types of layers are alternately stacked along [

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41

Korus, Gabriele, and Martin Jansen. "Untersuchungen An Natriumtrifluormethylsulfonat. Kristallstruktur von Natriumtrifluormethylsulfonat- Trifluormethylsulfonsäure (1/3) / Studies on Sodium Trifluoromethanesulfonate. Crystal Structure of Sodium Trifluoromethanesulfonate-Trifluoromethanesulfonic Acid (1/3)." Zeitschrift für Naturforschung B 53, no. 4 (1998): 438–42. http://dx.doi.org/10.1515/znb-1998-0409.

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Abstract Single crystals of sodium trifluoromethanesulfonate-trifluoromethanesulfonic acid (1/3) (NaSO3CF3 · 3 HSO3CF3) have been prepared by reaction of sodium trifluoromethanesulfonate with anhydrous trifluoromethanesulfonic acid at 60 °C. NaSO3CF3 · 3 HSO3CF3 crystallizes in space group I213 (No. 199) with a = 16.210(1) Å, Z = 8. Sodium is coordinated by six oxygen atoms from six different trifluoromethanesulfonic acid molecules, each acid molecule connecting two sodium ions. The 3-dimensional network resulting from the edge sharing octahedra corresponds to the cubic (10, 3) net, not reali

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42

Gowda, Basavalinganadoddy Thimme, Sabine Foro, Jozef Kožíšek, and Hartmut Fuess. "Crystal Structure Studies on Arylsulphonamides and N-Chloro-Arylsulphonamides." Zeitschrift für Naturforschung A 62, no. 7-8 (2007): 417–24. http://dx.doi.org/10.1515/zna-2007-7-811.

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The effect of ring substitution and N-chlorination on the molecular geometry of arylsulphonamides and N-chloro-arylsulphonamides have been studied by determining the crystal structures of 2-methyl- 4-chloro-benzenesulphonamide (2M4CBSA) and the sodium salt of N-chloro-2-methyl-4-chlorobenzenesulphonamide (NaNC2M4CBSA). The results are analyzed along with the crystal structures of benzenesulphonamide, 4-methyl-benzenesulphonamide and 4-chloro-benzenesulphonamide. The crystal structure of NaNC2M4CBSA has also been compared and correlated with the crystal structures of the above compounds and tho

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43

Wang, Guangguo, Yongquan Zhou, He Lin, Zhuanfang Jing, Hongyan Liu, and Fayan Zhu. "Structure of aqueous sodium acetate solutions by X-Ray scattering and density functional theory." Pure and Applied Chemistry 92, no. 10 (2020): 1627–41. http://dx.doi.org/10.1515/pac-2020-0402.

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AbstractThe structure of aq. sodium acetate solution (CH3COONa, NaOAc) was studied by X-ray scattering and density function theory (DFT). For the first hydrated layer of Na+, coordination number (CN) between Na+ and O(W, I) decreases from 5.02 ± 0.85 at 0.976 mol/L to 3.62 ± 1.21 at 4.453 mol/L. The hydration of carbonyl oxygen (OC) and hydroxyl oxygen (OOC) of CH3COO− were investigated separately and the OC shows a stronger hydration bonds comparing with OOC. With concentrations increasing, the hydration shell structures of CH3COO− are not affected by the presence of large number of ions, eac

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44

Kalinowska, M., W. Lewandowski, R. Swislocka, and E. Regulska. "The FT-IR, FT-Raman,1H and13C NMR study on molecular structure of sodium(I), calcium(II), lanthanum(III) and thorium(IV) cinnamates." Spectroscopy 24, no. 3-4 (2010): 277–81. http://dx.doi.org/10.1155/2010/679842.

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In this work the effect of sodium(I), calcium(II), lanthanum(III) and thorium(IV) ions on the electronic structure of cinnamic acid (phenylacrylic acid) was studied. In this research: infrared (FT-IR), Raman (FT-Raman), nuclear magnetic resonance (1H,13C NMR) were used. In the series of Na(I)→ Ca(II)→ La(III)→ Th(IV) cinnamates: (1) systematic shifts of several bands in the FT-IR and FT-Raman spectra, and (2) regular chemical shifts of protons1H and13C nuclei were observed.

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45

Tyutyunnik, Alexander P., Vladimir G. Zubkov, Ludmila L. Surat, Boris V. Slobodin, and Gunnar Svensson. "Synthesis and crystal structure of the pyrovanadate Na2ZnV2O7." Powder Diffraction 20, no. 3 (2005): 189–92. http://dx.doi.org/10.1154/1.1924434.

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The compound Na2ZnV2O7 with an åkermanite-type structure has been synthesized. It has a tetragonal unit cell, a=8.2711(4), c=5.1132(2) Å, and crystallizes with P-421m symmetry, Z=2. Its crystal structure has been refined from a combination of X-ray and neutron powder diffraction data. The structure contains layers of corner-sharing VO4 and ZnO4 tetrahedra, the former in pairs forming pyrovanadate V2O7 units. The sodium atoms are positioned between the layers, with a distorted antiprismatic coordination of oxygen atoms.

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46

Zhao, Wenqing, Limin Zhang, Feng Jiang, et al. "Engineering metal sulfides with hierarchical interfaces for advanced sodium-ion storage systems." Journal of Materials Chemistry A 8, no. 10 (2020): 5284–97. http://dx.doi.org/10.1039/c9ta13899d.

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Utilizing oxygen functional groups, interfacial reactions were carried out on the surface of natural stibnite, resulting in the formation of Sb<sub>2</sub>S<sub>3</sub>/Sb core–shell structure and sulfur-doped carbon matrix with improved sodium-storage capabilities.

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47

Cheng, Chien Min, Shih Fang Chen, Jen Hwan Tsai, Kai Huang Chen, and Hsiu Hsien Su. "Electrical and Physical Properties of Sodium Potassium Niobates Thin Films Prepared by rf Magnetron Sputtering Technology." Advanced Materials Research 239-242 (May 2011): 532–35. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.532.

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Lead-free potassium sodium niobate ceramic thin films were synthesized using rf magnetron sputtering technology for MFIS structures. The optimal sputtering parameters of the as-deposited KNN thin films for depositing times of 1h were obtained. Regarding the measured physical properties, the micro-structure and thickness of as-deposited KNN thin films for different oxygen concentration were obtained and compared by XRD patterns and SEM images. The surface roughness of KNN thin film was also observed by AFM morphology. The average grain size and root mean square roughness were 250 and 7.04 nm, r

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48

Ernst, Wolfgang E., and Stefan Rakowsky. "Rotational structure of the B–X system of Na3 from high-resolution resonant two-photon ionization spectroscopy." Canadian Journal of Physics 72, no. 11-12 (1994): 1307–14. http://dx.doi.org/10.1139/p94-166.

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First investigations of the [Formula: see text] system of Na3 at rotational resolution are reported. Using resonant two-photon ionization and optical-optical double resonance spectroscopy, two vibronic bands were assigned and rotationally analyzed. In the B state, the three sodium nuclei perform a nearly free pseudorotational motion in the moat of a pseudo-Jahn–Teller potential that is characterized by a vibronic angular momentum quantum number j. In states with J > 0, each rotational level is split by Coriolis interaction. Rotational and Coriolis coupling parameters were determined and are

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49

Sun, Jin, Rui Hang Lin, Xiao Bo Wang, Xiao Feng Zhu, and Zhen Zhong Gao. "Sodium Silicate as Catalyst and Modifier for Phenol-Formaldehyde Resin." Applied Mechanics and Materials 184-185 (June 2012): 1198–206. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.1198.

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The novel adhesives were prepared using PF resin as matrix and sodium silicate as modification additive. It was proved by Fourier transform infrared spectrometer (FTIR) that silicon-oxygen bonds had been successfully introduced to the structure of PF resin. Boiling water extraction (BWE)，scanning electron microscopy (SEM)，thermogravimetric analyzer (TGA) and differential scanning calorimetry (DSC) were used to characterize the structure of PF resin modified with sodium silicate (Na2SiO3-PF). The test results show that sodium silicate is an effective modifier to PF resin which lessen the brittl

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50

Hill, Geoffrey S., David G. Holah, Stephen D. Kinrade, Todd A. Sloan, Vincent R. Magnuson, and Valery Polyakov. "The X-ray structure of a sodium peroxide hydrate, Na2O2•8H2O, and its reactions with carbon dioxide: relevance to the brightening of mechanical pulps." Canadian Journal of Chemistry 75, no. 1 (1997): 46–51. http://dx.doi.org/10.1139/v97-006.

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The main component of the solid originally believed to be a peroxosilicate with pulp-brightening properties has been shown to be Na2O2•8H2O. The solid crystallizes in the monoclinic space group C2/c, with an empirical formula H8O5Na, and with a = 14.335(3), b = 6.461(1), c = 11.432(2) Å, β = 118.28(3)°, and Z = 8. The centrosymmetric structure consists of a peroxide anion with an O—O distance of 1.499(2) Å. Each of these oxygen atoms is at the apex of an approximate square-based pyramid, the base of which consists of four oxygen atoms of water molecules. The bases of the two pyramids are stagg

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