Project researcher, Tsukuda Laboratory, Department of Chemistry, Graduate School of Science, The University of Tokyo
2024.4−Current Project researcher, The University of Tokyo
2021.4−Current Ph. D, The University of Tokyo
Thesis: Electronic Structures and Bonding Interaction of Structurally Defined Gold/Silver Superatoms Probed by Anion Photoelectron Spectroscopy
2019.4−2021.3 M. Sc., The University of Tokyo
Thesis: Interfacial structure and dissociation process of alkynyl-protected gold clusters
2015.4−2019.3 B. Sc., The Univesity of Tokyo
2021.4−2023.4 Research fellowship for young scientists (DC1), JSPS
2019.9−2021.3 TAKUETSU (Excellence) Research Assistant (RA), The University of Tokyo
2024.3 The Graduate School of Science Encouragement Award, The University of Tokyo
2023.9 Excellent Award, FoPM
2023.3 CSJ Student Presentation Award, The 103rd Chemical Society of Japan Annual Meeting
2021.5 Young best presentation award, The 19th Annual Meeting of Society of Nano Science and Technology
2021.3 The Graduate School of Science Encouragement Award, The University of Tokyo
2019.3 The School of Science Encouragement Award, The University of Tokyo
2019.3 Department of Chemistry Award, The University of Tokyo
Negative Electron Binding Energy of the Au13 Core in Au25(SC6H4CO2H)18 Achieved by Ligand Deprotonations
S. Ito, Y. Fujiwara, T. Mohr, S. Masuda, K. Koyasu, M. M. Kappes, Tatsuya Tsukuda*
J. Phys. Chem. Lett. 2025, 16, 8531–8535.
Formation of Dimers of [MAu24(SCnH2n+1)18]− (M = Au, Pt; n = 6, 8, 10, 12) in Gas Phase by Overcoming Electrostatic Repulsion through Aurophilic and Multiple vdW Attractions
Y. Nakashima, S. Ito, K. Koyasu, T. Tsukuda*
J. Phys. Chem. Lett. 2025, 16, 6954–6959.
HOMO–LUMO Gap of [Au38(SC2H4Ph)24]0 Estimated by Photoelectron Spectroscopy on Its MALDI-Generated Anion
K. Akazawa, S. Ito, Y. Hamasaki, K. Koyasu, T. Tsukuda*
J. Phys. Chem. A 2025, 129, 6043–6048.
Structural Origin of Spin-Orbit Splitting of 1P Orbitals of Icosahedral Au13 Superatom Protected by Ligands
S. Ito*, K. Koyasu, T. Tsukuda*
Angew. Chem. Int. Ed. 2025, 64, e202508151.
Resistance of a PdAu12(8e) Core to Growth in Collision-Induced Sequential Reductive Elimination of (C≡CR)2 from [PdAu24(C≡CR)18]2−
S. Ito, K. Hirano, K. Koyasu, X.-K. Wan, Q.-M. Wang, T. Tsukuda*
J. Phys. Chem. Lett. 2024, 15, 11060–11066.
Revisiting the structure of [PdAu9(PPh3)8(CN)]2+ produced by atmospheric pressure plasma irradiation of [PdAu8(PPh3)8]2+ in methanol
T. Imagawa, S. Ito, F. Hennrich, M. Neumaier, P. Weis, K. Koyasu, M. M. Kappes*, T. Tsukuda*
J. Chem. Phys. 2024, 161, 024303.
Gas-Phase Anion Photoelectron Spectroscopy of Alkanethiolate-Protected PtAu12 Superatoms: Charging Energy in Vacuum vs Solution
Y. Tasaka, M. Suyama, S. Ito, K. Koyasu, M. M. Kappes*, F. Maran*, T. Tsukuda*
Angew. Chem., Int. Ed. 2024, 63, e202408335.
Gas-phase Structures of [Au21(SR)14]– and [Au17(SR)10]– with Eight Electrons: Can They Support an Icosahedral Au13 Core?
Y. Fujiwara, S. Ito, K. Koyasu, T. Tsukuda*
J. Phys. Chem. A 2024, 128, 3119-3125.
Cyclic ion mobility of doped [MAu24L18]2– superatoms and their fragments (M = Ni, Pd and Pt; L = alkynyl)
F. Hennrich, S. Ito, P. Weis, M. Neumaier, S. Takano, T. Tsukuda, M. M. Kappes*
Phys. Chem. Chem. Phys. 2024, 26, 8408-8418.
Vibrationally Resolved Absorption, Fluorescence, and Preresonance Raman Spectroscopy of Isolated Pyronin Y Cation at 5 K
S. Debnath*, A. Schäfer, S. Ito, D. Strelnikov, R. Schneider, K. A. Haupa, M. M. Kappes*
J. Phys. Chem. Lett. 2023, 14, 10553-10560.
Effect of total charge on the electronic structure of thiolate-protected X@Ag12 superatoms (X = Ag, Au)
K. Nakamura, S. Ito, K. Koyasu, T. Tsukuda*
Phys. Chem. Chem. Phys. 2023, 25, 5955-5959.
Supervalence Bonding in Bi-icosahedral Cores of [M1Au37(SC2H4Ph)24]– (M = Pd and Pt): Fusion-Mediated Synthesis and Anion Photoelectron Spectroscopy
E. Ito†, S. Ito†, S. Takano, T. Nakamura, T. Tsukuda* (†: Equal contribution)
JACS Au 2022, 2, 2627-2634.
Electron Affinities of Ligated Icosahedral M13 Superatoms Revisited by Gas-Phase Anion Photoelectron Spectroscopy
S. Ito, Y. Tasaka, K. Nakamura, Y. Fujiwara, K. Hirata, K. Koyasu, T. Tsukuda*
J. Phys. Chem. Lett. 2022, 13, 5049-5055.
Selected as Supplementary Cover Image
Correction to "Photoinduced Thermionic Emission from [M25(SR)18]– (M = Au, Ag) Revealed by Anion Photoelectron Spectroscopy"
K. Hirata, S. Ito, K. Kim, K. Nakamura, H. Kitazawa, S. Hayashi, K. Koyasu, T. Tsukuda*
J. Phys. Chem. C, 2022, 126, 8965-8966.
Critical Role of CF3 Groups in the Electronic Stabilization of [PdAu24(C≡C6H3(CF3)2)18]2– as Revealed by Gas-Phase Anion Photoelectron Spectroscopy
S. Ito, K. Koyasu, S. Takano, T. Tsukuda*
J. Phys. Chem. Lett. 2021, 12, 10417-10421.
Selected as Supplementary Cover Image
Ligand-Protected Gold/Silver Superatoms: Current Status and Emerging Trends
H. Hirai, S. Ito, S. Takano, K. Koyasu T. Tsukuda*
Chem. Sci. 2020, 11, 12233.
Collision–Induced Reductive Elimination of 1,3–Diynes from [MAu24(C≡CR)18]2– (M = Pd, Pt) Yielding Clusters of Superatoms
S. Ito, K. Koyasu, S. Takano, T. Tsukuda*
J. Phys. Chem. C, 2020, 124, 19119-19125.
Alkynyl-Protected Au22(C≡CR)18 Clusters Featuring New Interfacial Motifs and R-Dependent Photoluminescence
S. Ito, S. Takano, T. Tsukuda*
J. Phys. Chem. Lett. 2019, 10, 6892-6896.
Efficient and Selective Conversion of Phosphine-Protected (MAu8)2+ (M = Pd, Pt) Superatoms to Thiolate-Protected (MAu12)6+ or Alkynyl-Protected (MAu12)4+ Superatoms via Hydride Doping
S. Takano*, S. Ito, T. Tsukuda*
J. Am. Chem. Soc. 2019, 141, 15994-16002.
Electronic Structures and Bonding Interaction of Structurally Defined Gold/Silver Superatoms
Shun Ito
Springer Singapore, 2025.
"Elucidation of the Effect of Structural Factors on Spin-Orbit Splitting of Gold/Silver Superatoms" (oral)
Shun Ito, Kiichirou Koyasu, Tatsuya Tsukuda
The 23th Annual Meeting of Society of Nano Science and Technology, Tokyo, May 2025.
"Observation of spin-orbit splitting in gold/silver superatoms by gas-phase photoelectron spectroscopy" (oral)
Shun Ito, Kiichirou Koyasu, Tatsuya Tsukuda
The 105th CSJ Annual Meeting, Osaka, March 2025.
"Observation of spin-orbit splitting in gold/silver superatoms by gas-phase photoelectron spectroscopy" (oral)
Yuriko Tasaka, Megumi Suyama, Shun Ito, Kiichirou Koyasu, Tatsuya Tsukuda
The 18th Annual Meeting of Japan Society of Molecular Science, Kyoto, September 2024.
"Generation of superatomic molecules by collision-induced dissociation of 8-electron gold superatoms" (oral)
Shun Ito, Yuki Fujiwara, Kiichirou Koyasu, and Tatsuya Tsukuda
The 22th Annual Meeting of Society of Nano Science and Technology, Sendai, May 2024.
"Gas-phase photoelectron spectroscopy of [MAu24(C≡CR)18–2n]2– (M = Pd, Pt; n = 1–6: evolution of the electronic structure by sequential reductive elimination of alkynyl ligands" (oral)
Shun Ito, Kiichirou Koyasu, and Tatsuya Tsukuda
The 17th Annual Meeting of Japan Society of Molecular Science, Osaka, September 2023.
"Evaluation of Superatomic Electronic Structures of Ligand-Protected Gold/Silver Superatoms by Gas-Phase Photoelectron Spectroscopy" (poster)
Shun Ito, Kiichirou Koyasu, Tatsuya Tsukuda
International Symposium on Small Particles and Inorganic Clusters XXI (ISSPIC XXI), Berlin, Germany, August 2023.
"Characterization of electronic structures of ligand-protected superatoms and superatomic molecules by gas-phase photoelectron spectroscopy" (oral)
Shun Ito, Emi Ito, Shinjiro Takano, Kiichirou Koyasu, and Tatsuya Tsukuda
The 103rd CSJ Annual Meeting, Chiba, March 2023.
CSJ Student Presentation Award
"Electron affinities of ligand-protected gold/silver superatoms revisited: Suppression of multiphoton photoelectron detachment" (oral)
Shun Ito, Yuriko Tasaka, Katsunosuke Nakamura, yuki Fuhiwara, Keisuke Hirata, kiichirou Koyasu, and Tatsuya Tsukuda
The 16th Annual Meeting of Japan Society of Molecular Science, Yokohama, September 2022.
"Gas-phase photoelectron spectroscopy of mass-selected [PdAu24(C≡CArF)18–x(C≡CPh)x]2– (ArF = 3,5-(CF3)2C6H3): Increase of electron affinity by electron-withdrawing ability of ligands" (oral)
Shun Ito, Shinjiro Takano, Kiichirou Koyasu, and Tatsuya Tsukuda
The 15th Annual Meeting of Japan Society of Molecular Science, Online, September 2021.
"Gas-phase photoelectron spectroscopy of [PdAu24(L1)18–x(L2)x]2– (L1, L2 = alkynyl): Modulation of electron affinity by successive ligand exchange" (poster)
Shun Ito, Katsunosuke Nakamura, Yuriko Tasaka, Shinjiro Takano, Kiichirou Koyasu, and Tatsuya Tsukuda
The 19th Annual Meeting of Society of Nano Science and Technology, Online, May 2021.
Young Best Presentation Award
"Reductive elimination of 1,3–diynes induced by collision of alkynyl-protected superatoms [MAu24(C≡CR)18]2– (M = Pd, Pt): Formation of novel clusters of superatoms" (oral)
Shun Ito, Kiichirou Koyasu, Shinjiro Takano, and Tatsuya Tsukuda
Online meeting of Japan Society of Molecular Science, Online, September 2020..
"Reductive elimination induced by collision of [MAu24(C≡CR)18]2– (M = Pd, Pt)" (poster)
Shun Ito, Kiichirou Koyasu, and Tatsuya Tsukuda
The 68th Annual Conference on Mass Spectrometry, Osaka, May 2020.
"Structures and Photoluminescence Properties of New Alkynyl-Protected Gold Clusters Au22(C≡CR)18" (poster)
Shun Ito, Shinjiro Takano, and Tatsuya Tsukuda
International Symposium on Monolayer Protected Clusters 19 (ISMPC19), Xiamen University, China, 2019 September.
"Effect of alkynyl ligands on photoluminescence properties of novel Au clusters Au22(C≡CR)18" (oral)
Shun Ito, Shinjiro Takano, and Tatsuya Tsukuda
The 13th Annual Meeting of Japan Society of Molecular Science, Aichi, September 2019.
"Atomically-precise synthesis and characterization of Alkynyl-protected Au clusters Au18(C≡CR)14" (poster)
Shun Ito, Shinjiro Takano, and Tatsuya Tsukuda
The 17th Annual Meeting of Society of Nano Science and Technology, Kagoshima, May 2019.
"Synthesis and characterization of a magic-number phenylacetylene-protected gold cluster Au18(C≡CPh)14" (oral)
Shun Ito, Shinjiro Takano and Tatsuya Tsukuda
The 99th CSJ Annual Meeting, Kobe, March 2019.