Behavior of hydroxyl radicals on water ice at low temperatures

M Tsuge, N Watanabe - Accounts of Chemical Research, 2021 - ACS Publications
Conspectus Because chemical reactions on/in cosmic ice dust grains covered by
amorphous solid water (ASW) play important roles in generating a variety of molecules …

Proton transport and related chemical processes of Ice

DH Lee, H Kang - The Journal of Physical Chemistry B, 2021 - ACS Publications
Excess protons play a key role in the chemical reactions of ice because of their exceptional
mobility, even when the diffusion of atoms and molecules is suppressed in ice at low …

Direct determination of the activation energy for diffusion of OH radicals on water ice

A Miyazaki, M Tsuge, H Hidaka, Y Nakai… - The Astrophysical …, 2022 - iopscience.iop.org
Using a combination of photostimulated desorption and resonance-enhanced multiphoton
ionization methods, the behaviors of OH radicals on the surface of an interstellar ice analog …

Energetic electron irradiations of amorphous and crystalline sulphur-bearing astrochemical ices

DV Mifsud, P Herczku, R Rácz, KK Rahul… - Frontiers in …, 2022 - frontiersin.org
Laboratory experiments have confirmed that the radiolytic decay rate of astrochemical ice
analogues is dependent upon the solid phase of the target ice, with some crystalline …

UV-induced formation of ice XI observed using an ultra-high vacuum cryogenic transmission electron microscope and its implications for planetary science

A Kouchi, Y Kimura, K Kitajima, H Katsuno… - Frontiers in …, 2021 - frontiersin.org
The occurrence of hydrogen atom-ordered form of ice Ih, ice XI, in the outer Solar System
has been discussed based on laboratory experiments because its ferroelectricity influences …

On the Mechanism and Quantum Tunneling of the CO2 + OH Anion Reaction in Ice: A Computational Study

AP Jayaweera, B Senevirathne… - ACS Earth and Space …, 2024 - ACS Publications
The mechanism of the reaction between CO2 and OH–(anion) in ice cluster models was
determined using density functional theory (DFT), employing the ωB97X-D functional and …

Radical reactions on interstellar icy dust grains: Experimental investigations of elementary processes

M Tsuge, N Watanabe - Proceedings of the Japan Academy, Series B, 2023 - jstage.jst.go.jp
Molecular clouds (MCs) in space are the birthplace of various molecular species. Chemical
reactions occurring on the cryogenic surfaces of cosmic icy dust grains have been …

PyQM/MM: a Python Interface for ONIOM (QM: MM) Calculations with the AMOEBA09 Polarizable Force Field to Study the Chemical Processes in the Interstellar …

P Rathnayake, WMC Sameera, N Watanabe - 2022 - chemrxiv.org
We have developed a Python interface, PyQM/MM, to perform ONIOM (QM: MM) calculations
with the AMOEBA09 polarizable force field. The ONIOM (QM: MM) implementation in …

(第22 回若手奨励賞受賞研究) イオンビームによる液相分子の放射線物理化学に関する研究

北島謙生 - 原子衝突学会誌しょうとつ, 2021 - jstage.jst.go.jp
抄録 本稿では MeV エネルギーのイオンビームが液体中で誘起する放射線物理および化学過程
に関する研究について解説する. 高速イオン衝突により液体中の分子は直接的な電離や励起を …