大下 慶次郎 (Keijiro OHSHIMO)
経歴
1993年3月 東京都
私立 学習院高等科 卒業
1997年3月 東北大学理学部化学科 卒業
1999年3月 東北大学大学院理学研究科化学専攻
博士前期課程修了
1999年4月 日本学術振興会特別研究員(DC1)(受入機関・東北大学)
2002年3月 東北大学大学院理学研究科化学専攻
博士後期課程修了、博士(理学)
2002年4月 日本学術振興会特別研究員(PD)(受入機関・分子科学研究所)
2003年7月 独立行政法人理化学研究所
鈴木化学反応研究室 研究員
2011年4月 独立行政法人理化学研究所
東原子分子物理研究室 研究員
2012年4月 東京大学大学院理学系研究科化学専攻
化学反応学研究室 客員研究員(兼務)
2013年4月 東北大学大学院理学研究科化学専攻
理論化学研究室 助教(現職)
2015年4月 東北大学
高度教養教育・学生支援機構 助教(〜2017年3月)
論文
72.
Keijiro Ohshimo, Xi He, Ryosuke Ito, Kengo Tsunoda, Sota Tainaka, and
Fuminori Misaizu
"Cryogenic
ion mobility-mass spectrometry for the study of conformations of host-guest
complexes"
EPJ Techniques and Instrumentation, accepted.
71.
Yuto Nakajima, M. Abdul Latif, Toshiaki Nagata, Keijiro Ohshimo, and
Fuminori Misaizu
"Size-Dependent
Geometrical Structures of Platinum Oxide Cluster Cations Studied by Ion
Mobility-Mass Spectrometry"
J. Phys. Chem. A, accepted.
70.
Yuri Ito, Mizuhiro Kominato, Yuji Nakashima, Keijiro Ohshimo, and
Fuminori Misaizu
"Fragment imaging in infrared photodissociation of Ar-tagged protonated
water clusters, H3O+-Ar and H+(H2O)2-Ar"
Phys. Chem. Chem. Phys., 25, 9404-9412 (2023).
69.
Satoru Muramatsu, Keijiro Ohshimo, Yuan Shi, Motoki Kida, Rong Shang,
Yohsuke Yamamoto, Fuminori Misaizu, Yoshiya Inokuchi
"Gas-Phase
Characterization of Hypervalent Carbon Compounds Bearing 7-6-7-Ring Skeleton:
Penta-versusTetra-Coordinate Isomers"
Chemistry – A European Journal, e202203163 (2023).
68.
Mitsuo Takayama, Masaaki Ubukata, Keijiro Ohshimo, Kenji Nagatomo,
Fuminori Misaizu
"Identification
of complementary McLafferty rearrangement ions at m/z 222 and 224
of methylstearate using high-resolution electron ionization time-of-flight mass
spectrometer"
Int. J. Mass Spectrom., 484, 116978 (2023). (10 pages)
67.
Ryosuke Ito, Xi He, Keijiro Ohshimo, Fuminori Misaizu
"Large
Conformational Change in the Isomerization of Flexible Crown Ether Observed at
Low Temperature"
J. Phys. Chem. A, 126(27), 4359-4366 (2022).
66.
Masaomi Sanekata, Yuki Nakagomi, Mutsuki Hirayama, Hiroshi Nishida, Nobuo
Nishimiya, Masahide Tona, Hiroaki Yamamoto, Keizo Tsukamoto, Kiyokazu Fuke, Keijiro
Ohshimo, Kiichirou Koyasu, and Fuminori Misaizu
"Time-of-flight
mass spectrometry diagnostics in deep oscillation magnetron sputtering (DOMS)
of titanium"
J. Appl. Phys., 131, 243301 (2022). (7 pages)
65.
Yotaro Misao, Toshiaki Nagata, Motoyoshi Nakano, Keijiro Ohshimo, and
Fuminori Misaizu
"Structural
assignments of yttrium oxide cluster cations studied by ion mobility mass
spectrometry"
Phys. Chem. Chem. Phys., 24, 11096-11103 (2022).
64.
Ryosuke Ito, Keijiro Ohshimo, and Fuminori Misaizu
"Structures
of dibenzo-24-crown-8 complex with an NH4+ ion studied by
cryogenic ion mobility-mass spectrometry"
Chem. Phys. Lett., 794, 139510 (2022). (5 pages)
63.
Toshiaki Nagata, Jenna W. J. Wu, Motoyoshi Nakano, Keijiro Ohshimo, and
Fuminori Misaizu
"Geometrical
Structures of Gas Phase Cerium Oxide Cluster Cations after Reaction with Nitric
Oxide Studied by Ion Mobility Mass Spectrometry"
J. Phys. Chem. A, 126(7), 1204-1210 (2022).
62.
Masaomi Sanekata, Hiroshi Nishida, Yuki Nakagomi, Yoshihiro Hirai, Nobuo
Nishimiya, Masahide Tona, Naoyuki Hirata, Hiroaki Yamamoto, Keizo Tsukamoto, Keijiro
Ohshimo, Fuminori Misaizu, and Kiyokazu Fuke
"Dependence
of Optical Emission Spectra on Argon Gas Pressure during Modulated Pulsed Power
Magnetron Sputtering (MPPMS)"
Plasma, 4(2), 269-280 (2021).
61.
Keijiro Ohshimo, Xi He, Ryosuke Ito, and Fuminori Misaizu
"Conformer
Separation of Dibenzo-Crown-Ether Complexes with Na+ and K+ ions
Studied by Cryogenic Ion Mobility-Mass Spectrometry"
J. Phys. Chem. A, 125(17),
3718-3725 (2021).
60.
Masaomi Sanekata, Hiroshi Nishida, Tatsuya Watabe, Yuki Nakagomi, Yoshihiro
Hirai, Nobuo Nishimiya, Masahide Tona, Hiroaki Yamamoto, Naoyuki Hirata, Keizo
Tsukamoto, Keijiro Ohshimo, Fuminori Misaizu, and Kiyokazu Fuke
"Delayed
discharge bridging two sputtering modes from modulated pulsed power magnetron
sputtering (MPPMS) to deep oscillation magnetron sputtering (DOMS)"
Plasma, 4(2), 239-251 (2021).
59.
Yuji Nakashima, Yuri Ito, Mizuhiro Kominato, Keijiro Ohshimo, and
Fuminori Misaizu
“Photofragment ion imaging in vibrational predissociation of the H2O+Ar
complex ion”
J. Chem. Phys., 154, 174301 (2021).
58.
Sota Tainaka, Tomoyuki Ujihira, Mayuko Kubo, Motoki Kida, Daisuke Shimoyama,
Satoru Muramatsu, Manabu Abe, Takeharu Haino, Takayuki Ebata, Fuminori Misaizu,
Keijiro Ohshimo, and Yoshiya Inokuchi
"Conformation
of K+(Crown Ether) Complexes Revealed by Ion Mobility-Mass
Spectrometry and Ultraviolet Spectroscopy"
J. Phys. Chem. A, 124(48), 9980-9990 (2020).
57.
Keijiro Ohshimo, Ryosuke Sato, and Fuminori Misaizu
"Intramolecular
Dispersion Attraction in Tetraalkylammonium Cations Revealed by Cryogenic Ion
Mobility Mass Spectrometry"
J. Phys. Chem. A, 124(39), 7999-8004 (2020).
56.
Kiichirou Koyasu, Ryohei Tomihara, Toshiaki Nagata, Jenna W. J. Wu, Motoyoshi
Nakano, Keijiro Ohshimo, Fuminori Misaizu, and Tatsuya Tsukuda
"Sequential
growth of iridium cluster anions based on simple cubic packing"
Phys. Chem. Chem. Phys., 22(32), 17842-17846 (2020).
55.
M. Abdul Latif, Toshiaki Nagata, Motoyoshi Nakano, Keijiro Ohshimo, and
Fuminori Misaizu
"Structure
Assignment and Separation of Isomers of Palladium Oxide Cluster Anions Studied
by Ion Mobility Mass Spectrometry"
J. Phys. Chem. C, 124(17),
9604-9610 (2020).
54.
Keijiro Ohshimo, Shun Miyazaki, Keigo Hattori, and Fuminori Misaizu
"Long-distance proton transfer induced by a single ammonia molecule: ion
mobility mass spectrometry of protonated benzocaine reacted with NH3"
Phys. Chem. Chem. Phys., 22(15), 8164-8170 (2020).
53.
Keizo Tsukamoto, Tetsuro Tamura, Hiromi Matsusaki, Masahide Tona, Hiroaki
Yamamoto, Yuki Nakagomi, Hiroshi Nishida, Yoshihiro Hirai, Nobuo Nishimiya,
Masaomi Sanekata, Keijiro Ohshimo, Kiichirou Koyasu, and Fuminori
Misaizu
"Time-of-flight mass spectrometric diagnostics for ionized and neutral
species in high power pulsed magnetron sputtering of titanium"
Jpn. J. Appl. Phys., 59, SHHB05 (2020).
52.
Motoyoshi Nakano, Daiki Hebiguchi, Shohei Azuma, Ryoichi Moriyama, Keijiro
Ohshimo, and Fuminori Misaizu
"Structures of Magnesium Oxide Cluster Cations Studied Using Ion Mobility
Mass Spectrometry"
J. Phys. Chem. A, 124(1), 101-107 (2020).
51.
Yuri Ito, Yuji Nakashima, Kenichi Okutsu, Motoyoshi Nakano, Keijiro Ohshimo,
and Fuminori Misaizu
"Visible
photodissociation study of NO dimer cation using ion imaging technique combined
with theoretical calculations"
Chem.
Phys. Lett., 739, 137022 (2020).
50.
M. Abdul Latif, Jenna W. J. Wu, Toshiaki Nagata, Motoyoshi Nakano, Keijiro
Ohshimo, and Fuminori Misaizu
"Compositions
and Isomer Separation of Palladium Oxide Cluster Cations Studied by Ion
Mobility Mass Spectrometry"
J.
Phys. Chem. C, 123(28), 17580-17587
(2019).
49.
Toshiaki Nagata, Jenna W. J. Wu, Motoyoshi Nakano, Keijiro Ohshimo, and
Fuminori Misaizu
"Geometrical
Structures of Gas Phase Cerium Oxide Cluster Cations Studied by Ion Mobility
Mass Spectrometry"
J.
Phys. Chem. C, 123(27), 16641-16650
(2019).
48.
Fuminori Misaizu, M. Abdul Latif, Jenna W. J. Wu, Ryoichi Moriyama, Motoyoshi
Nakano, Kiichirou Koyasu, and Keijiro Ohshimo
"Structures
of Stable Oxide Cluster Ions of First-Row Late Transition Metals: An Ion
Mobility-Mass Spectrometric Study"
AIP
Conf. Proc., 2186, 030017 (2019).
47.
Ryohei Tomihara, Kiichirou Koyasu, Toshiaki Nagata, Jenna W. J. Wu, Motoyoshi
Nakano, Keijiro Ohshimo, Fuminori Misaizu, and Tatsuya Tsukuda
"Structural
Evolution of Iridium Oxide Cluster Anions IrnOm- (n
= 5-8) with Sequential Oxidation: Binding Mode of O Atoms and Ir
Framework"
J.
Phys. Chem. C, 123(24), 15301-15306
(2019).
46.
Keijiro Ohshimo, Tohru Takahashi, Motoyoshi Nakano, Fuminori Misaizu
"Geometrical
structures and molecular adsorption reactions of alkali-halide cluster ions
investigated by ion mobility-mass spectrometry"
Bull.
Soc. Sea Water Sci. Jpn., 73, 59-64
(2019). (Proceeding of World Salt Symposium 2018)
45.
Yuji Nakashima, Kenichi Okutsu, Keita Fujimoto, Yuri Ito, Manabu Kanno,
Motoyoshi Nakano, Keijiro Ohshimo, Hirohiko Kono and Fuminori Misaizu
"Visible
photodissociation of the CO2 dimer cation: fast and slow
dissociation dynamics in the excited state"
Phys.
Chem. Chem. Phys., 21, 3083-3091
(2019).
44.
M. Abdul Latif, Jenna W. J. Wu, Ryoichi Moriyama, Motoyoshi Nakano, Keijiro
Ohshimo, Fuminori Misaizu
"Stable
compositions and structures of copper oxide cluster cations CunOm+ (n
= 2-8) studied by ion mobility mass spectrometry"
ACS
Omega, 3 (12), 18705-18713 (2018).
43.
Kenichi Okutsu, Kenichiro Yamazaki, Motoyoshi Nakano, Keijiro Ohshimo,
Fuminori Misaizu
“Ion Imaging of MgI+ Photofragment in Ultraviolet
Photodissociation of Mass-Selected Mg+ICH3 Complex”
J.
Phys. Chem. A, 122 (22), 4948-4953
(2018).
42.
Keijiro Ohshimo, Kengo Akimoto, Masato Ogawa, Wataru Iwasaki, Hiroaki
Yamamoto, Masahide Tona, Keizo Tsukamoto, Motoyoshi Nakano, and Fuminori
Misaizu
“Correlation between Electronic Shell Structure and Inertness of Cun+ toward O2
Adsorption at n = 15, 21, 41, and 49”
J.
Phys. Chem. A, 122 (11), 2927-2932
(2018).
41.
Ryoichi Moriyama, Jenna W. J. Wu, Motoyoshi Nakano, Keijiro Ohshimo, and
Fuminori Misaizu
"Small
Carbon Nano-Onions: An Ion Mobility Mass Spectrometric Study"
J.
Phys. Chem. C, 122 (9), 5195-5200
(2018).
40.
Jenna W. J. Wu, Ryoichi Moriyama, Motoyoshi Nakano, Keijiro Ohshimo, and
Fuminori Misaizu
“Compositions and structures of niobium oxide cluster ions, NbmOn±, (m = 2−12)
revealed with ion mobility mass spectrometry”
Phys.
Chem. Chem. Phys., 19, 24903-24914
(2017).
39.
Keisuke Hirata, Keishiro Yamashita, Satoru Muramatsu, Shinjiro Takano, Keijiro
Ohshimo, Toshiyuki Azuma, Ryuzo Nakanishi, Takashi Nagata, Seiji Yamazoe,
Kiichirou Koyasu, and Tatsuya Tsukuda
“Anion Photoelectron Spectroscopy of Free [Au25(SC12H25)18]−”
Nanoscale,
9, 13409-13412 (2017).
38.
Ryoichi Moriyama, Ryuki Sato, Motoyoshi Nakano, Keijiro Ohshimo, and
Fuminori Misaizu
“Geometrical Structures of Gas Phase Chromium Oxide Cluster Anions
Studied by Ion Mobility Mass Spectrometry”
J.
Phys. Chem. A 121 (30), 5605-5613
(2017).
37.
Keijiro Ohshimo, Isamu Mizuuchi, Kengo Akimoto, Keizo Tsukamoto,
Masahide Tona, Hiroaki Yamamoto, Motoyoshi Nakano, and Fuminori Misaizu
“Mass Spectrometric Study of N2-Adsorption on Copper
Cluster Cations Formed by Modulated Pulsed Power Magnetron Sputtering in
Aggregation Cell”
Chem.
Phys. Lett. 682, 60-63 (2017).
36.
Kenichi Okutsu, Yuji Nakashima, Kenichiro Yamazaki, Keita Fujimoto, Motoyoshi
Nakano, Keijiro Ohshimo, and Fuminori Misaizu
"Development
of a linear-type double reflectron for focused imaging of photofragment ions
from mass-selected complex ions"
Rev.
Sci. Instrum. 88, 053105 (2017). (8
pages)
35.
Kenichi Okutsu, Kenichiro Yamazaki, Keijiro Ohshimo, Fuminori Misaizu
“Photofragment ion imaging from mass-selected Mg+BrCH3
complex: Dissociation mechanism following photoinduced charge transfer”
J.
Chem. Phys. 146 (2), 024301 (2017).
(6 pages)
34.
Ryoichi Moriyama, Jenna W. J. Wu, Keijiro Ohshimo, Fuminori Misaizu
“Structures of Vanadium Oxide Cluster Ions up to Nanometer Diameter
Investigated by Ion Mobility Mass Spectrometry”
Bull.
Chem. Soc. Jpn. 89, 1225-1229 (2016).
33.
Jenna W. J. Wu, Ryoichi Moriyama, Hiroshi Tahara, Keijiro Ohshimo,
Fuminori Misaizu
“Compositions and Structures of Vanadium Oxide Cluster Ions VmOn+/- (m
= 2 – 20) Investigated by Ion Mobility Mass Spectrometry”
J.
Phys. Chem. A 120(21), 3788-3796
(2016).
32.
Keijiro Ohshimo, Naoya Norimasa, Ryoichi Moriyama, Fuminori Misaizu
“Stable compositions and geometrical structures of titanium oxide cluster cations and anions studied by ion mobility mass spectrometry”
J.
Chem. Phys. 144(19), 194305 (2016).
(8 pages)
31.
Hiroshi Hoshino, Yoshihiro Yamakita, Kenichi Okutsu, Yoshitomo Suzuki, Masataka
Saito, Kiichirou Koyasu, Keijiro Ohshimo, Fuminori Misaizu
“Photofragment imaging from mass-selected ions using a reflectron
mass spectrometer I. Development of an apparatus and application to Mg+-Ar
complex”
Chem.
Phys. Lett. 630, 111-115 (2015).
30.
Kenichi Okutsu, Keijiro Ohshimo, Hiroshi Hoshino, Kiichirou Koyasu,
Fuminori Misaizu
“Photofragment imaging from mass-selected ions using a reflectron
mass spectrometer II. Formation mechanism of MgF+ in the
photodissociation of Mg+-FCH3 complex”
Chem.
Phys. Lett. 630, 57-61 (2015).
29.
Keijiro Ohshimo, Shohei Azuma, Tatsuya Komukai, Ryoichi Moriyama,
Fuminori Misaizu
“Structures and CO-Adsorption Reactivities of Nickel Oxide Cluster
Cations Studied by Ion Mobility Mass Spectrometry”
J.
Phys. Chem. C, 119(20), 11014-11021
(2015).
28.
Keijiro Ohshimo, Tatsuya Komukai, Tohru Takahashi, Naoya Norimasa, J. W.
J. Wu, Ryoichi Moriyama, Kiichirou Koyasu, Fuminori Misaizu
“Application of Ion Mobility-Mass Spectrometry to the Study of Ionic
Clusters - Investigation of Cluster Ions with Stable Sizes and Compositions”
Mass
Spectrometry 3(3), S0043 (2014). (7 pages)
27.
Keijiro Ohshimo, Tohru Takahashi, Ryoichi Moriyama, Fuminori Misaizu
”Compact Non-Rock-Salt Structures in Sodium Fluoride Cluster Ions at
Specific Sizes Revealed by Ion Mobility Mass Spectrometry”
J.
Phys. Chem. A 118(43), 9970-9975 (2014).
26.
Keijiro Ohshimo, Tatsuya Komukai, Ryoichi Moriyama, Fuminori Misaizu
"Isomer
Separation of Iron Oxide Cluster Cations by Ion Mobility Mass
Spectrometry"
J. Phys. Chem. A 118(22), 3899-3905 (2014).
25.
Kiyoshi Nishizawa, Keijiro Ohshimo, and Toshinori Suzuki
”Vacuum ultraviolet and soft X-ray photoelectron spectroscopy of
liquid beams using a hemispherical photoelectron spectrometer with a multistage
differential pumping system"
J.
Chinese Chem. Soc. 60, 1403-1410 (2013).
24.
Kosuke Ota, Kiichirou Koyasu, Keijiro Ohshimo, and Fuminori Misaizu
"Structures
of Cobalt Oxide Cluster Cations Studied by Ion Mobility Mass Spectrometry"
Chem.
Phys. Lett. 588, 63-67 (2013).
23.
Keijiro Ohshimo, Yoshiya Inokuchi, Takayuki Ebata, Koichi Ohno
“Anionic Polymerization Mechanism of Acrylonitrile Trimer Anions: Key
Branching Point between Cyclization and Chain Propagation”
J.
Phys. Chem. A 116 (30), 7937-7942 (2012).
22.
Yoshihiro Ogi, Hiroshi Kohguchi, Dongmei Niu, Keijiro Ohshimo, Toshinori
Suzuki
“Super-Resolution Photoelectron Imaging with Real-Time Subpixelation
by Field Programmable Gate Array and Its Application to NO and Benzene
Photoionization”
J.
Phys. Chem. A 113 (52), 14536-14544 (2009).
21.
Mizuki Oku, Yu Hou, Xi Xing, Beth Reed, Hong Xu, Chao Chang, Cheuk-Yiu Ng,
Kiyoshi Nishizawa, Keijiro Ohshimo, Toshinori Suzuki
“3s Rydberg and cationic states of pyrazine studied by photoelectron
spectroscopy”
J.
Phys. Chem. A 112 (11), 2293-2310 (2008).
20.
Kazuo Watanabe, Anton Kokalj, Yoshiya Inokuchi, Izabela Rzeznicka, Keijiro
Ohshimo, Nobuyuki Nishi, Tatsuo Matsushima
“Orientation of nitrous oxide on palladium(110) by STM”
Chem.
Phys. Lett. 406 (4-6), 474-478 (2005).
19.
Hironori Tsunoyama, Yuichiro Yasumura, Keijiro Ohshimo, Fuminori
Misaizu, Koichi Ohno
“Electron Distribution and Intracluster Reaction in [Nan(CS2)2]-
Negative Ion Clusters”
European
Phys. J. D 34 (1-3), 89-92 (2005).
18.
Yoshiya Inokuchi, Keijiro Ohshimo, Fuminori Misaizu, Nobuyuki Nishi
“Infrared Photodissociation Spectroscopy of [Mg•(H2O)1-4]+ and [Mg•(H2O)1-4•Ar]+”
J.
Phys. Chem. A 108 (23), 5034-5040 (2004).
17.
Yoshiya Inokuchi, Keijiro Ohshimo, Fuminori Misaizu, Nobuyuki Nishi
“Structures of [Mg•(H2O)1,2]+
and [Al•(H2O)1,2]+ ions
studied by infrared photodissociation spectroscopy. Evidence of [HO–Al–H]+ ion core structure in [Al•(H2O)2]+”
Chem.
Phys. Lett. 390 (1-3), 140-144 (2004).
16.
Fuminori Misaizu, Hironori Tsunoyama, Yuichiro Yasumura, Keijiro Ohshimo,
Koichi Ohno
“Photoelectron spectroscopy and density functional theory calculation
of Nan(CS2)- cluster negative ions for
n=1 and 2”
Chem.
Phys. Lett. 389 (4-6), 241-246 (2004).
15.
Hironori Tsunoyama, Keijiro Ohshimo, Fuminori Misaizu, Koichi Ohno
"Intracluster
cyclization reaction producing a benzene derivative: Photoionization mass
spectrometric study of alkali metal-methyl propiolate clusters"
Int.
J. Mass Spectrom. 232, 41-50 (2004).
14.
Keijiro Ohshimo, Fuminori Misaizu, Koichi Ohno
"Negative-ion
photoelectron spectroscopy of acrylonitrile clusters containing a sodium
atom"
European
Phys. J. D 24(1-3), 339-342 (2003).
13.
Yoshiya Inokuchi, Keijiro Ohshimo, Kazuhiko Ohashi, Yoshiki Honkawa,
Hiroshi Sekiya, Nobuyuki Nishi
“Fermi resonance interaction in hetero-dimer and trimer ions
containing aniline+”
Chem.
Phys. Lett. 373(5-6), 568-574 (2003).
12.
Ari Furuya, Keijiro Ohshimo, Hironori Tsunoyama, Fuminori Misaizu,
Koichi Ohno, Hidekazu Watanabe
"Photodissociation
of Mg(CH2=CHCN)n+: Excited electronic
states of n=1 and 2 and intracluster electron transfer for n=3
and 4"
J.
Chem. Phys. 118(12), 5456-5464 (2003).
11.
Keijiro Ohshimo, Fuminori Misaizu, Koichi Ohno
"Intracluster
multiple trimeric cyclization of acrylonitrile clusters initiated by electron
transfer from a potassium atom: Size-dependent pathways in metastable
dissociation of K+(CH2=CHCN)n
photoions"
J.
Chem. Phys. 117(11), 5209-5220 (2002).
10.
Keijiro Ohshimo, Ari Furuya, Hironori Tsunoyama, Fuminori Misaizu,
Koichi Ohno
"Photoionization
mass spectroscopy of clusters of alkali metal atoms with methyl vinyl ketone
and acrolein: Intracluster oligomerization initiated by electron transfer from
a metal atom"
Int.
J. Mass Spectrom. 216(1), 29-40 (2002).
9.
Hironori Tsunoyama, Keijiro Ohshimo, Fuminori Misaizu, Koichi Ohno
"Intracluster
electron transfer and reactions in alkali metal-methacrylate clusters"
J.
Phys. Chem. A 105(42), 9649-9658 (2001).
8.
Keijiro Ohshimo, Hironori Tsunoyama, Fuminori Misaizu, Koichi Ohno
"Intracluster
electron transfer from a metal atom/cluster followed by anionic oligomerization
of vinyl molecules"
European
Phys. J. D 16(1-3), 107-110 (2001).
7.
Fuminori Misaizu, Keijiro Ohshimo, Hironori Tsunoyama, Ari Furuya, Koichi
Ohno
"Size-Dependent
Intracluster Reactions in Metal-Vinyl Molecule Clusters: Anionic
Oligomerization Initiated by Electron Transfer"
Trans.
MRS-J 26(4), 1135-1138 (2001).
6.
Hironori Tsunoyama, Keijiro Ohshimo, Fuminori Misaizu, Koichi Ohno
"Intracluster
anionic oligomerization of acrylic ester molecules initiated by electron
transfer from an alkali metal atom"
J.
Am. Chem. Soc. 123(4), 683-690 (2001).
5.
Keijiro Ohshimo, Fuminori Misaizu, Koichi Ohno
"Anionic
oligomerization of acrylonitrile molecules initiated by intracluster electron
transfer from alkali metal atoms: Photoionization mass spectrometry of M(CH2=CHCN)n
(M=Li, Na and K)"
J.
Phys. Chem. A 104(4), 765-770 (2000).
4.
Hironori Tsunoyama, Keijiro Ohshimo, Yoshihiro Yamakita, Fuminori
Misaizu, Koichi Ohno
"Photoionization
and density functional theory study of clusters of acetone containing an alkali
metal atom, M((CH3)2CO)n (M=Li, Na):
Intracluster electron transfer from metal to acetone in 1:1 complexes"
Chem.
Phys. Lett. 316(5-6), 442-448 (2000).
3.
Naoki Kishimoto, Keijiro Ohshimo, Koichi Ohno
"Penning
Ionization of Vinyl Chloride and Vinyl Iodide by Collision with He*(23S)
Metastable Atoms"
J.
Electron Spectrosc. Relat. Phenom. 104(1-3), 145-154 (1999).
2.
Keijiro Ohshimo, Hironori Tsunoyama, Yoshihiro Yamakita, Fuminori
Misaizu, Koichi Ohno
"Photoionization
and density functional study of clusters of alkali metal atoms solvated with
acetonitrile molecules M(CH3CN)n (M=Li and
Na)"
Chem.
Phys. Lett. 301(3-4), 356-364 (1999).
1.
Hideo Yamakado, Kohji Okamura, Keijiro Ohshimo, Naoki Kishimoto, Koichi
Ohno
"Effect
of HOMO Levels on Chemiionization of Substituted Ethylenes by Metastable Helium
Atoms"
Chem.
Lett. 269-270 (1997).
総説
4.
大下 慶次郎、宮ア 舜、佐藤 良亮、服部 圭吾、美齊津 文典
「プロトン付加分子のイオン移動度質量分析−イオン分子反応による分子内プロトン移動−」
J. Mass Spectrom. Soc. Jpn., 70(1), 36-42 (2022).
3.
大下 慶次郎、美齊津 文典
「イオン移動度質量分析によるクラスターイオンの構造異性体分離」
分光研究、分光便利帳欄、64(4),
480-483 (2015).
2. 大下 慶次郎、美齊津
文典
「クラスターのイオン移動度分析」
化学と工業、ディビジョントピックス欄、68(1), 025 (2015).
1. 大下 慶次郎、美齊津
文典
「移動管法を使った原子分子科学とその周辺 第4回 イオン移動度質量分析法によるクラスターイオンの構造研究」
原子衝突学会誌「しょうとつ」11(6), 148-156 (2014).
特許
1. 鈴木 俊法、大下 慶次郎「液体微粒子化ノズル及びそれを用いた装置」
特許公開 2007-038124
受賞
1. 東北大学・青葉理学振興会賞(平成11年度)
「アルカリ金属原子が極性溶媒により溶媒和されたクラスターの光イオン化」
招待講演・依頼講演
12.
「イオン移動度質量分析を用いたプロトン付加分子におけるプロトン移動反応の研究」
第70回質量分析総合討論会2022、福岡、2022年6月(招待講演)
11.
「温度可変低温イオン移動度質量分析によるホスト−ゲスト錯体の異性化反応の研究」
原子衝突学会第46回年会、オンライン、2021年10月
10.
「イオン移動度質量分析を用いたホスト-ゲスト化合物の構造と異性化反応の研究」
第9回イオン移動度研究会、オンライン、2021年4月
9.
「イオン移動度質量分析と量子化学計算による分子内長距離プロトン移動の反応経路探索」
IQCE量子化学探索講演会2020、オンライン、2020年11月
8.
“Size
selectivity of O2 adsorption on coinage metal nanocluster ions
studied by mass spectrometry”
平成30年度化学系学協会東北大会、秋田、2018年9月
7.
“Structures
and Reactivities of Metal Oxide Cluster Ions Studied by Ion Mobility Mass
Spectrometry (IMMS)”
Tohoku-Melbourne
Research Workshop on Science: Recent Advances in Physical Chemistry/Chemical
Physics, Sendai, November 7, 2017.
6.
“Size-
and Isomer-dependent Adsorption Reactivity of Metal Oxide Cluster Ions Studied
by Ion Mobility Mass Spectrometry”
The
20th East Asian Workshop on Chemical Dynamics, Kaohsiung, Taiwan, June 12-15,
2016.
5.
“Structures
and Reactions of Metal Oxide Cluster Ions Studied by Ion Mobility Mass Spectrometry”
International
Symposium on Molecular Science – Physical Chemistry – , Kyoto,
March 26, 2016.
4.
“Structures
and CO-adsorption reactivities of nickel oxide cluster ions studied by ion
mobility mass spectrometry”
Pacifichem
2015, Waikiki, Hawaii, December 14-18, 2015.
3.「イオン移動度質量分析を用いたイオン結合クラスターの構造研究」
第3回イオン移動度研究会、船橋、2014年4月
2.「分子クラスターの重合反応における化学反応経路」
シンポジウム「化学反応経路探索のニューフロンティア2012」、東京、2012年9月
1.「金属原子からの電子移動で開始されるビニル化合物のクラスター内重合反応」
分子研研究会「立体反応ダイナミクスの新展開」、岡崎、2000年7月
学内外における活動
28.
東北大学理学部化学科 オープンキャンパス実行委員(2023年)
27.
東北大学理学部化学科 一般雑誌会委員(2022年度)
26.
日本質量分析学会 イオン反応研究部会委員(2021-2024年度)
25.
日本化学会第101春季年会 プログラム小委員会編成委員(2021年)
24.
第68回質量分析総合討論会 セッションサブオーガナイザー(2020年)
23.
東北大学理学部化学科 安全管理委員会副委員長補佐
(2020-2021年度)
22.
東北大学理学部化学科 教務委員(クラス担任・2年生)(2020年度)
21.
東北大学理学部化学科 懇和会委員(2018-2019年度)
20.
東北大学理学部化学科 広報委員(2018-2019年度)
19.
東北大学理学部化学科 新入生オリエンテーション実行委員(2018年度)
18.
日本化学会第98春季年会 プログラム小委員会編成委員(2017年)
17.
第11回分子科学討論会実行委員(2017年)
16.
東北大学理学部化学科 パンフレット制作WG委員(2017年)
15.
東北大学理学部化学科 オープンキャンパス実行委員(2017年)
14.
東北大学理学部化学科 教務委員(クラス担任・2年生)(2017年度)
13.
化学グランプリ2016
一次選考会(宮城会場)会場担当(2016年)
12.
第56回分子科学若手の会夏の学校 分科会講師(2016年)「イオン移動度分析法を中心とした気相分光実験」
11.
東北大学理学部化学科・大学院理学研究科化学専攻ホームページ刷新WG委員(2016年)
10.
東北大学理学部化学科 一般雑誌会委員(2016年度)
9.
東北化学同窓会 幹事(広報担当)(2015年度)
8.
東北大学 自然科学総合実験 副曜日責任者(2015-2016年度)
7.
東北大学 自然科学総合実験 テキスト執筆(2015-2017年度)
6.
東北大学 自然科学総合実験 課題責任者(燃料電池)(2015-2017年度)
5.
東北大学 自然科学総合実験 実施・計画委員会委員(2015-2017年度)
4.
東北大学大学院理学研究科 自修会委員(2014年度)
3.
東北大学理学部化学科 安全管理委員会副委員長補佐
(2014年度)
2.
第29回化学反応討論会実行委員(2013年)
1.
第25回化学反応討論会実行委員(2009年)