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Showing 1 to 20 of 25 for “"Hydrogen fluoride"”.
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Preliminary investigations of gas phase hydrogen fluoride saccharification
Thesis (M.S.)--Michigan State University. Dept. of Chemical Engineering, 1985
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Experimental study of the interaction between aluminum and hydrogen fluoride in biocidal explosions
… measuring the temperature and concentration of hydrogen fluoride (HF) in complex, turbulent flows. These diagnostics were used to investigate the potential suppression of the biocidal species due to aluminum interaction in situ. In the field of counter chemical and biological warfare, explosives …
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Experimental and theoretical study of CW hydrogen fluoride chemical laser residual fundamental gain
A new technique that uses a multi-line probe beam to measure the gain on several lines simultaneously was developed. This new technique was used to measure the gains of the peak fundamental lines P$\sb1$ (4-9) and P$\sb2$(4-9) while lasing on the overtone, for three levels of media saturation. The …
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On the performance characteristics of multiple pass hydrogen fluoride chemical laser master oscillator/power amplifiers
The performance of a cw Hydrogen Fluoride (HF) chemical laser master oscillator with power amplifier was measured as a function of input power, the number of passes through the gain media, location of the optical axis of the input beam and oscillator/amplifier flow field match/mismatch. The …
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Studies in Molecular Collision Dynamics: Tunneling in Chemical Reactions and Vibrational Energy Transfer in Hydrogen-Fluoride Systems
Made available in DSpace on 2014-12-13T20:10:47Z (GMT). No. of bitstreams: 1 8009006.pdf: 3987233 bytes, checksum: e11d66b452a643d2fbf4e5d5296cdd7e (MD5) Previous issue date: 1979
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Evaluation of the corrosion resistance of yttrium aluminum garnet thin films to hydrogen fluoride gas in CVD applications
Includes bibliographical references (pages 51-53).
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Addition of carbonyl fluoride to organic and inorganic nitriles
Carbonyl fluoride will add to alkyl and perfluoroalkyl nitriles and alkane dinitriles in anhydrous acids to form the corresponding α,α-difluoroalkyl isocyanate, perfluoroalkyl isocyanate, or α,α,ω,ω-tetrafluoro- α,ω-diisocyanatoalkane. With acetonitrile the reaction proceeded slowly in anhydrous …
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Rigorous Studies of the Electronic Structures of Molecules and Molecular Complexes. Electron Correlation Effects in the Hydrogen Bonding of Small Dimeric Systems (Hydrogen Fluoride, Carbon Monoxide, Nitrogen, Hydrogen Cyanide)
… correlation in the weakly interacting dimers of hydrogen fluoride with the nitrogen molecule, carbon monoxide and hydrogen cyanide are presented. While linear equilibrium structures are found for these complexes, an attempt is made to elucidate their vibrationally averaged structures. It is found …
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Density Functional Theory Study of Rutile SiO₂ Stishovite: An Electron Pair Description of Bulk and Surface Properties
… using simple molecular models. The adsorption of hydrogen fluoride was studied on the (110) surface. The geometry optimized and electronic structure have been found for various initial geometries. Relaxed structures of certain initial geometries give dissociated hydrogen fluoride upon geometry …
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Étude de l'adsorption du HF à la surface de la glace
… in fundamental science i.e. the dissociation of hydrogen fluoride in water. Among hydrogen halides, hydrogen fluoride is well-known to behave as a weak acid in water in contrast to the three other hydrogen halides (HC1, HBr and HI). Different hypothesis were proposed to explain the reasons of …
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Aspects of radiation curing
… in situ by infrared and UV spectroscopy and hydrogen fluoride is credited as the true initiator of the cationic polymerisation of epoxides in an open system. The UV photolysis of the aforementioned onium salts led to the production of volatiles, resulting in the polymerisation of thin films …
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A study of the electronic effects of various substituents on the course of an aromatic cyclodehydration reaction vs. a Elbs-type reaction
… the ketones w1th alumina and w1th l1qu1d hydrogen fluoride are reported.
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Searching for planets
… velocities (PRVs) have been obtained by useof a hydrogen fluoride (HF) cell over the period 1980 to 1992, for twenty-one dwarf andsubgiant stars (luminosity classes IV and V) together with eleven giants and supergiants(luminosity classes I, II, and III). A typical PRV measurement has an accuracy …
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A theoretical study of molecular crystals
… extended, periodic, one-dimensional zigzag hydrogen fluoride chain was studied with this method and the energies, structures, harmonic, and anharmonic frequencies of the infrared- and/or Raman-active vibrations, phonon dispersions, and inelastic neutron scattering (INS) were calculated. A …
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Studies of immobilized homogeneous metal catalysts on silica supports
… tethered complex catalyzes the enantioselective hydrogenation of methyl-alpha-acetamidocinnamate (MAC). Spectral and catalytic investigations indicate that the tethered complex reacts by the same mechanism as the untethered complex in solution.;The rhodium complexes, [Rh(COD)H]4, [Rh(COD)2] …
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Biochemical Characterization of Hydroxyproline-rich Glycoproteins in the Arabidopsis Root Cell Wall
… after deglycosylation of the wall by anhydrous hydrogen fluoride followed by MS/MS sequencing to identify wall-associated proteins. The extensins known as EXT1 and RSH were found in wild type Arabidopsis root cell walls. This result suggests that RSH and EXT1 are covalently cross-linked in the …
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Mechanochemical Reaction Development for Addition, Elimination, and Isomerization
… reaction, namely the mechanical release of hydrogen fluoride, and its application to triggered polymer degradation. As a versatile reagent for material remodeling, hydrogen fluoride has applications in self-immolative polymers, remodeled siloxanes, and degradable polymers. The responsive, in …
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Extending first principles spectroscopy to disordered materials: a study on amorphous and crystalline aluminas
… how the structure of am-Al₂O₃ is affected by hydrogen fluoride incorporation in Li-ion batteries, by calculating ²⁷Al NMR on protonated and fluorinated amorphous aluminas. These results are in line with experimental ²⁷Al NMR evidence for a pathway of HF attack involving the formation of …
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