Osamu Sekiguchi

Principal Engineer - Theoretical chemistry
Image of Osamu Sekiguchi
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Phone +47-22855541
Room V 248 / V252 / V244
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Visiting address Sem Sælands vei 26 None 0371 OSLO
Postal address Postboks 1033 0315 OSLO
Tags: Instrument responsible

Publications

  • Abboud, Jose-Luis M; Koppel, Ilmar A; Uggerud, Einar; Leito, Ivo; Koppel, Ivar; Sekiguchi, Osamu; Kaupmees, Karl; Saame, Jaan; Kutt, Karl & Mishima, Masaaki (2015). Solution and Gas-Phase Acidities of all-trans (all-E) Retinoic Acid: An Experimental and Computational Study. Chemistry - A European Journal.  ISSN 0947-6539.  21(31), s 11238- 11243 . doi: 10.1002/chem.201500717
  • Westgård Erichsen, Marius; Mortén, Magnus; Svelle, Stian; Sekiguchi, Osamu; Uggerud, Einar & Olsbye, Unni (2015). Conclusive Evidence for Two Unimolecular Pathways to Zeolite-Catalyzed De-alkylation of the Heptamethylbenzenium Cation. ChemCatChem.  ISSN 1867-3880.  7(24), s 4143- 4147 . doi: 10.1002/cctc.201500793
  • Sekiguchi, Osamu & Uggerud, Einar (2013). Fragmentation of Deprotonated Glycolaldehyde in the Gas Phase and Relevance to the Formose Reaction. Journal of Physical Chemistry A.  ISSN 1089-5639.  117(44), s 11293- 11296 . doi: 10.1021/jp4053715
  • Zimnicka, Magdalena; Sekiguchi, Osamu; Uggerud, Einar & Danikiewicz, Witold (2012). Reactions of nitrophenide and halonitrophenide ions with acrylonitrile and alkyl acrylates in the gas phase: The case of [M-2](-) ion formation. International Journal of Mass Spectrometry.  ISSN 1387-3806.  316-318, s 76- 83 . doi: 10.1016/j.ijms.2011.12.015
  • Zimnicka, Magdalena; Wilenska, Beata; Sekiguchi, Osamu; Uggerud, Einar & Danikiewicz, Witold (2012). Reactions of nitrophenide and halonitrophenide ions with acrylonitrile and alkyl acrylates in the gas phase: addition to the carbonyl group versus Michael addition. Journal of Mass Spectrometry.  ISSN 1076-5174.  47(4), s 425- 438 . doi: 10.1002/jms.2042
  • Simakov, Anton; Sekiguchi, Osamu; Bunkan, Arne Joakim Coldevin & Uggerud, Einar (2011). Energetics and Mechanisms for the Unimolecular Dissociation of Protonated Trioses and Relationship to Proton-Mediated Formaldehyde Polymerization to Carbohydrates in Interstellar Environments. Journal of the American Chemical Society.  ISSN 0002-7863.  133(51), s 20816- 20822 . doi: 10.1021/ja206600w
  • Fooladi, Erik; Krapp, Andreas; Sekiguchi, Osamu; Tilset, Mats & Uggerud, Einar (2010). Mechanism for C-H bond activation in ethylene in the gas phase vs. in solution - vinylic or agostic? Revisiting the case of protonated Cp*Rh(C2H4)(2). Dalton Transactions.  ISSN 1477-9226.  39(27), s 6317- 6326 . doi: 10.1039/b926542b Show summary
  • Sekiguchi, Osamu; Meyer, V; Letzel, MC; Kuck, D & Uggerud, Einar (2009). Energetics and reaction mechanisms for the competitive losses of H-2, CH4 and C2H4 from protonated methylbenzenes-implications to the methanol-to-hydrocarbons (MTH) process. European journal of mass spectrometry.  ISSN 1469-0667.  15(2), s 167- 181 . doi: 10.1255/ejms.953
  • Andersson, Patrik; Ryding, Mauritz; Sekiguchi, Osamu & Uggerud, Einar (2008). Isotope exchange and structural rearrangements in reactions between size-selected ionic water clusters, H3O+(H2O)n and NH4+(H2O)n, and D2O. Physical Chemistry, Chemical Physics - PCCP.  ISSN 1463-9076.  10(40), s 6127- 6134 . doi: 10.1039/b804584d
  • Sekiguchi, Osamu; Letzel, MC; Kuck, D & Uggerud, Einar (2006). The unimolecular dissociation of protonated glyoxylic acid: Structure and dynamics of a step-by-step process. International Journal of Mass Spectrometry.  ISSN 1387-3806.  255, s 177- 184
  • Svelle, Stian; Bjørgen, Morten; Kolboe, Stein; Kuck, D; Letzel, M; Olsbye, Unni; Sekiguchi, Osamu & Uggerud, Einar (2006). Intermediates in the methanol-to-hydrocarbons (MTH) reaction: a gas phase study of the unimolecular reactivity of multiply methylated benzenium cations. Catalysis Letters.  ISSN 1011-372X.  109
  • Adlhart, Christian; Sekiguchi, Osamu & Uggerud, Einar (2005). On the Gas-Phase Reactivity of Complexed OH+ Halogenated Alkanes. Chemistry - A European Journal.  ISSN 0947-6539.  11(1), s 152
  • Horn, Anne; Møllendal, Harald; Sekiguchi, Osamu; Uggerud, Einar; Roberts, Helen; Viaggio, A. A. & Fridgen, Travis D. (2004). THE GAS-PHASE FORMATION OF METHYL FORMATE IN HOT MOLECULAR CORES. The Astrophysical Journal.  ISSN 0004-637X.  611, s 605- 614 Show summary
  • Horn, Anne; Møllendal, Harald; Sekiguchi, Osamu; Uggerud, Einar; Roberts, H.; Herbst, E.; Viggiano, A.A.; Fridgen, Travis D. & Hjalmarson, Åke (2004). The gas-phase formation of methyl formate in hot molecular cores. The Astrophysical Journal.  ISSN 0004-637X.  611, s 605- 614
  • Sekiguchi, Osamu; Bakken, Vebjørn & Uggerud, Einar (2004). Decomposition of protonated formic acid: One transition state - Two product channels. Journal of the American Society for Mass Spectrometry.  ISSN 1044-0305.  15, s 982- 988

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  • Andersson, Patrik; Ryding, Mauritz; Sekiguchi, Osamu & Uggerud, Einar (2008). Proton transfer and proton mobility in water.
  • Ryding, Mauritz; Andersson, Patrik; Krapp, Andreas; Frenking, Gernot; Sekiguchi, Osamu; Bakken, Vebjørn & Uggerud, Einar (2008). Elementary chemical reactions of water clusters.
  • Rydning, Mauritz; Andersson, Patrik; Sekiguchi, Osamu & Uggerud, Einar (2007). Proton transfer in H3O+(H2O)n, NH4+(H2O)n and OH-(H2O)n clusters.
  • Adlhart, Christian; Sekiguchi, Osamu & Uggerud, Einar (2005). The Oxidative Power of Complexed OH+: The Gas Phase Reactivty of L-OH+ with Halogenated Alkanes by FT-ICR.
  • Bakken, Vebjørn; Sekiguchi, Osamu & Uggerud, Einar (2004). Decomposition of protonated formic acid: One transition state serving two product channels.
  • Fooladi, Erik; Bruheim, Inge Aleksander; Sekiguchi, Osamu; Tilset, Mats; Greibrokk, Tyge & Uggerud, Einar (2003). Ethene Oligomerisation in Various Reaction Media. Show summary

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Published Nov. 11, 2010 9:01 AM - Last modified June 29, 2011 8:35 AM