6909-54-2Relevant academic research and scientific papers
Formation of hydrogen peroxide and water from the reaction of cold hydrogen atoms with solid oxygen at 10 K
Miyauchi,Hidaka,Chigai,Nagaoka,Watanabe,Kouchi
, p. 27 - 30 (2008)
The reactions of cold H atoms with solid O2 molecules were investigated at 10 K. The formation of H2O2 and H2O has been confirmed by in situ infrared spectroscopy. We found that the reaction proceeds very effici
Hydrogenation processes from hydrogen peroxide: An investigation in Ne matrix for astrochemical purposes
Zins, Emilie-Laure,Krim, Lahouari
, p. 22172 - 22180 (2014/06/23)
Hydrogenation processes are of paramount importance in the interstellar medium. Many laboratory experiments were carried out from unsaturated species. Herein, the hydrogenation of hydrogen peroxide was experimentally investigated step by step by means of the matrix isolation technique. This reaction leads to the formation of water. Moreover, the formation of H3O2 and OH radicals as intermediates was characterized. Such a hydrogenation process should take place on the surface of dust grains in the interstellar medium. This reaction is consistent with the very small amount of interstellar hydrogen peroxide. This hydrogenation process also takes place in solid phase. This journal is the Partner Organisations 2014.
Vibrational overtone spectrum of matrix isolated cis, cis-HOONO
Zhang, Xu,Nimlos, Mark R.,Ellison, G. Barney,Varner, Mychel E.,Stanton, John F.
, p. 1 - 5 (2009/02/03)
Cis, cis-peroxynitrous acid is known to be an intermediate in atmospheric reactions between OH and N O2 as well as HOO and NO. The infrared absorption spectra of matrix-isolated cc-HOONO and cc-DOONO in argon have been observed in the range of 500-8000 cm-1. Besides the seven fundamentalvibrational modes that have been assigned earlier for this molecule [Zh ang, J. Chem. Phys. 124, 084305 (2006)], more than 50 of the overtone and combination bands have been observed for cc-HOONO and cc-DOONO. Ab initio CCSD(T)/atomic natural orbital anharmonic force field calculations were used to help guide the assignments. Based on this study of the vibrational overtone transitions of cis, cis-HOONO that go as high as 8000 cm-1 and the earlier paper on the vibrational fundamentals, we conclude that the CCSD(T)/ANO anharmonic frequencies seem to correct to ±35 cm-1. The success of the theoretically predicted anharmonic frequencies {} in assigning overtone spectra of HOONO up to 8000 cm-1 suggests that the CCSD(T)/ANO method is producing a reliable potential energy surface for this reactive molecule.
Electron irradiation of crystalline and amorphous D2O ice
Zheng, Weijun,Jewitt, David,Kaiser, Ralf I.
, p. 289 - 294 (2008/10/09)
We studied the electron irradiation of crystalline and amorphous deuterated water ices at 12 K. The experiments show that molecular deuterium (D2), molecular oxygen (O2), and Hydrogen peroxide (D2O2) were produced inside the irradiated ice samples. A quantitative comparison of crystalline and amorphous ice samples showed that the production rates of D2, O2 and D2O2 in amorphous ices are systematically higher than those in crystalline samples. Reaction mechanisms and astrophysical implications are discussed.
Mechanism of formation of hydrogen trioxide (HOOOH) in the ozonation of 1,2-diphenylhydrazine and 1,2-dimethylhydrazine: An experimental and theoretical investigation
Plesnicar, Bozo,Tuttle, Tell,Cerkovnik, Janez,Koller, Joze,Cremer, Dieter
, p. 11553 - 11564 (2007/10/03)
Low-temperature (-78 °C) ozonation of 1,2- diphenylhydrazine in various oxygen bases as solvents (acetone-d6, methyl acetate, tert-butyl methyl ether) produced hydrogen trioxide (HOOOH), 1,2-diphenyldiazene, 1,2-diphenyldiazene-N-oxide, and hydrogen peroxide. Ozonation of 1,2-dimethylhydrazine produced besides HOOOH, 1,2-dimethyldiazene, 1,2-dimethyldiazene-N-oxide and hydrogen peroxide, also formic acid and nitromethane. Kinetic and activation parameters for the decomposition of the HOOOH produced in this way, and identified by 1H, 2H, and 17O NMR spectroscopy, are in agreement with our previous proposal that water participates in this reaction as a bifunctional catalyst in a polar decomposition process to produce water and singlet oxygen (O2, 1Δg). The possibility that hydrogen peroxide is, besides water, also involved in the decomposition of hydrogen trioxide is also considered. The half-life of HOOOH at room temperature (20 °C) is 16 ± 1 min in all solvents investigated. Using a variety of DFT methods (restricted, broken-symmetry unrestricted, self-interaction corrected) in connection with the B3LYP functional, a stepwise mechanism involving the hydrotrioxyl (HOOO.) radical is proposed for the ozonation of hydrazines (RNHNHR, R = H, Ph, Me) that involves the abstraction of the N-hydrogen atom by ozone to form a radical pair, RNNHR..OOOH. The hydrotrioxyl radical can then either abstract the remaining N(H) hydrogen atom from the RNNHR. radical to form the corresponding diazene (RN=NR), or recombines with RNNHR. in a solvent cage to form the hydrotrioxide, RN(OOOH)NHR. The decomposition of these very labile hydrotrioxides involves the homolytic scission of the RO-OOH bond with subsequent in cage formation of the diazene-N-oxide and hydrogen peroxide. Although 1,2-diphenyldiazene is unreactive toward ozone under conditions investigated, 1,2-dimethyldiazene reacts with relative ease to yield 1,2-dimethyldiazene-N-oxide and singlet oxygen (O2, 1Δg). The subsequent reaction sequence between these two components to yield nitromethane as the final product is discussed. The formation of formic acid and nitromethane in the ozonolysis of 1,2-dimethylhydrazine is explained as being due to the abstraction of a methyl H atom of the CH3NNHCH3. radical by HOOO . in the solvent cage. The possible mechanism of the reaction of the initially formed formaldehyde methylhydrazone (and HOOOH) with ozone/oxygen mixtures to produce formic acid and nitromethane is also discussed.
Isotope effect in the formation of hydrogen peroxide by the sonolysis of light and heavy water
Nikitenko
, p. 649 - 653 (2007/10/03)
The kinetics of the formation of hydrogen peroxide by the sonolysis of light and heavy water in argon and oxygen atmospheres was investigated. The sonochemical reaction has a zero order with respect to hydrogen peroxide (H2O2, D2O2, or DHO2). The measurement of the kinetic isotope effect (α), defined as the ratio of the reaction rates in H2O and D2O, carried out under argon gave a value of 2.2±0.3. The observed isotope effect decreases with an increase in the concentration of light water in H2O-D2O mixtures. No isotope effect is displayed in the oxygen atmosphere (α = 1.05±0.10). The isotope effect is determined presumably by the mechanism of sonochemical decomposition of water molecules, which includes the H2O-Ar* and D2O-Ar* energy exchange (where Ar* are argon atoms in the 3P20 excited state) in the nonequilibrium plasma generated by a shock wave, arising upon a cavitation collapse.
