2024-03-28T13:44:24Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/710762022-11-17T02:08:08Zhdl_2115_20056hdl_2115_147Negative catalytic effect of water on the reactivity of hydrogen abstraction from the C-H bond of dimethyl ether by deuterium atoms through tunneling at low temperaturesOba, Yasuhiro1000050271531Watanabe, Naoki1000060161866Kouchi, Akiraopen access©2016, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International440We report an experimental study on the catalytic effect of solid water on the reactivity of hydrogen abstraction (H-abstraction) from dimethyl ether (DME) in the low-temperature solid DME-H2O complex. When DME reacted with deuterium atoms on a surface at 15-25 K, it was efficiently deuterated via successive tunneling H-abstraction and deuterium (D)-addition reactions. The 'effective rate constant for DME-H2O + D was found to be about 20 times smaller than that of pure DME + D. This provides the first evidence that the presence of solid water has a negative catalytic effect on tunneling H-abstraction reactions. (C) 2016 Elsevier B.V. All rights reserved.Elsevier2016-07-29engjournal articleAMhttp://hdl.handle.net/2115/71076https://doi.org/10.1016/j.cplett.2016.07.0580009-2614Chemical physics letters6621418https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/71076/1/OBA%20et%20al.%202016%20for%20self-archive.docx-1.pdfapplication/pdf780.54 KB2016-07-29