International Conference

  1. ◇ Invited talk ◇
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    Ryusei Oketani
    34th Meeting of the European Crystallographic Association (ECM34), Padova, August, 2024.
  2. ◇ Poster ◇
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    Ryusei Oketani, Musashi Okada, Ichiro Hisaki
    OPTICS & PHOTONICS International Congress 2024 (OPIC2024), Yokohama, April, 2024.
  3. ◇ Invited talk ◇
    Overcoming a Solid Solution System on Chiral Resolution: Combining Crystallization and Dissolution
    Ryusei Oketani, Koki Shiohara, Ichiro Hisaki
    2023 Taiwan-Japan Bilateral Workshop (TJBW2023), Tainan, December, 2024.
  4. ◇ Poster ◇
    Order-disorder Phase Transition between High- and Low-Z’ crystal structures: Crystallographic and non-linear optics study on transition
    Ryusei Oketani, Hiroki Takahashi, Simon Clevers, Akira Oyamada,Ichiro Hisaki, Gérard Coquerel, Hirohito Tsue
    26th Congress and General Assembly of the International Union of Crystallography (IUCr2023), Melbourne, August, 2023.
  5. ◇ Invited talk ◇
    Temperature-induced Order-disorder Phase Transition of N,C-protected dipeptide
    Ryusei Oketani, Hiroki Takahashi, Simon Clevers, Akira Oyamada,Ichiro Hisaki, Gérard Coquerel, Hirohito Tsue
    apan Taiwan Bilateral Workshop (JTBW2022), Osaka, November, 2022.
  6. ◇ Oral ◇
    Order-Disorder Phase Transition of N,C-protected Methyonylglycine
    Ryusei Oketani, Hiroki Takahashi, Simon Clevers, Akira Oyamada,Ichiro Hisaki, Gérard Coquerel, Hirohito Tsue
    The 17th Conference of the Asian Crystallographic Association (AsCA2022), Jeju, October, 2022.
  7. ◇ Oral ◇
    Order-Disorder Phase Transition Between High- and Low-Z’ Crystal Structures of N,C-Protected Dipeptide
    Ryusei Oketani, Hiroki Takahashi, Simon Clevers, Akira Oyamada,Ichiro Hisaki, Gérard Coquerel, Hirohito Tsue
    14th International Workshop of the Crystal Growth of Organic Material (CGOM14), Brussels, September, 2022.
  8. ◇Poster ◇
    Phase diagram study and chiral resolution of axially chiral naphthamide derivative
    Ryusei Oketani, Marine Hoquante, Clément Brandel, Simon Clevers, Francesco Marin, Paul Tinnemans, Hugo Meekes, Elias Vlieg, Yves Geerts, Pascal Cardinael, Gérard Coquerel
    24th International Conference on the Chemistry of the Organic Solid State (ICCOSS XXIV 2019), New York, June, 2019.
  9. ◇ Oral ◇
    Phase equilibria between atropisomers: Chirality Induced by Dissymmetric Distribution
    François-Xavier Gendron, Ryusei Oketani, Gérard Coquerel
    Journées André Collet de la Chiralité (JACC 2018), Noirmoutier, September, 2018.
  10. ◇Poster ◇
    Interplay of the racemization rate and the crystal growth rate on the deracemization rate
    Ryusei Oketani, Clément Brandel, Pascal Cardinael, Gérard Coquerel
    The 25th Bremen International Workshop on Industrial Crystallization (BIWIC2018), Rouen, September, 2018.
  11. ◇Oral◇
    The role of racemization and crystal growth kinetics on deracemization rate of naphthamide compound using temperature cycling
    Ryusei Oketani, Clément Brandel, Pascal Cardinael, Gérard Coquerel
    13th International Workshop of the Crystal Growth of Organic Material (CGOM13), Seoul, August, 2018.
  12. ◇Plenary talk◇
    Complex behaviors in a system composed of two couples of atropisomers: heterogeneous equilibria, crystallography and deracemization
    Gérard Coquerel, Ryusei Oketani, François-Xavier Gendron, Reiko Kuroda
    13th International Workshop of the Crystal Growth of Organic Material (CGOM13), Seoul, August, 2018.
  13. ◇Poster◇
    Crystal structure and gas adsorption behavior of magnesium porphyrin with open coordination sites
    Ryusei Oketani, Hiroki Takahashi, Rui Tamura, Hirohito Tsue
    Pacifichem 2015, Honolulu, December, 2015.
  14. ◇Poster◇
    X-ray Crystallographic Analysis of CO2 Adsorption State in Seemingly Nonporous Crystal of N,C-Proteced Methionylalanine
    Ryusei Oketani, Yuya Mori, Kohei Sasaki, Hiroki Takahashi, Rui Tamura, Hirohito Tsue
    22nd International Conference on the Chemistry of the Organic Solid State (ICCOSS XXII JAPAN 2015), Niigata, July, 2015.
  15. ◇Poster◇
    Formation of Lactones from Aromatic Diacid Compounds in Acetonitrile Solution by TiO2-Photocatalytic Reactions
    Ryusei Oketani, Suguru Higashida, Michio Matsumura
    The Seventh Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT7), Kyoto, June, 2014.
  16. ◇Poster◇
    Effects of Additive Agents on Oxidative Cleavage Reaction of trans-Stilbene using TiO2 Photocatalyst in Acetonitrile Solution
    Teruyuki Miyake, Ryusei Oketani, Suguru Higashida, Michio Matsumura
    The 17th SANKEN International Symposium, Osaka, January, 2014.
  17. ◇Oral◇
    Demonstration display of the railroad model vehicle which carried a fuel cell system
    Ryusei Oketani, Taiki Uemoto, Fuya Nagano, Makoto Yamauchi, Kimihiko Sugiura
    SEMICON JAPAN2013 “The KOSEN@SEMICON”, Chiba, December, 2013.

Domestic Conference

  1. ◇ Oral ◇
    Deracemization of a stable conglomerate system
    Reiko Kuroda, François-Xavier Gendron, Clément Pinètre, Ryusei Oketani, and Gérard Coquerel
    Symposium on Molecular Chirality 2022, Sapporo, June 15-16, 2022.
  2. ◇Poster◇
    Deracemization of atropisomeric naphthamide through temperature cycles
    Ryusei Oketani, Clément Brandel, Pascal Cardinael, Gérard Coquerel
    Symposium on Molecular Chirality 2018, Chiba, May 11-12, 2018.
  3. ◇Invited talk◇
    Crystallization and macroscopic symmetry breakings
    Gérard Coquerel, Ryusei Oketani, François-Xavier Gendron, Manon Schindler, Simon Clevers, Clément De Saint Jores, Pascal Cardinaël, Najla El Gharbi, R Kuroda, Clément Brandel
    Symposium on Molecular Chirality 2018, Chiba, May 11-12, 2018.
  4. ◇Oral◇
    CO2 Adsorption State in Seemingly Nonporous Crystal of N,C-Proteced Methionylalanine: X-ray Crystallographic Analysis and Intermolecular Interactions
    Ryusei Oketani, Yuya Mori, Kohei Sasaki, Hiroki Takahashi, Seiji Tsuzuki, Rui Tamura, Hirohito Tsue
    27th Symposium on Physical Organic Chemistry, Hiroshima, September 1-3, 2016.
  5. ◇Oral◇
    Crystal Structure and Hydrogen Storage Behavior of Metalloporphyrins
    Ryusei Oketani, Kazuaki Yamanaka, Hiroki Takahashi, Toshimasa Katagiri, Yoshihiro Noro, Seiji Tsuzuki, Rui Tamura, Hirohito Tsue
    Chemical Society of Japan The 96th annual meeting, Kyoto, March 24-27, 2016.
  6. ◇Oral◇
    Crystal Structure and Gas Adsorption Property of Magnesium Porphyrin with Open Coordination Sites
    Ryusei Oketani, Hiroki Takahashi, Rui Tamura and Hirohito Tsue
    Chemical Society of Japan The 95th annual meeting, Chiba, March 26-29, 2015.
  7. ◇Poster◇
    X-ray Crystallographic Analysis of CO2 Adsorption State in the Crystal of N,C-Proteced Methionylalanine
    Ryusei Oketani, Yuya Mori, Kohei Sasaki, Hiroki Takahashi, Rui Tamura and Hirohito Tsue
    The 23rd Organic Crystal Symposium, Chiba, September 15-17, 2014.
  8. ◇Poster◇
    Formation of Lactones by Decarboxylation of Aromatic Diacids via TiO2-Mediated Photocatalytic Reactions
    Ryusei Oketani, Suguru Higashida and Michio Matsumura
    Chemical Society of Japan The 94th annual meeting, Aichi, March 27-30, 2014.
  9. ◇Poster◇
    Formation of Lactones from aromatic diacid compounds by the photocatalytic reaction
    Ryusei Oketani, Suguru Higashida and Michio Matsumura
    Japan Association for College of Technology The 19th annual meeting, Kochi, August 31- September 1, 2013.
  10. ◇Oral◇
    Cyclization of aromatic diacid compounds by TiO2-photocatalytic reaction with decarboxylation
    Ryusei Oketani, Suguru Higashida and Michio Matsumura
    The Society for Mathematical Sciences The 32nd annual meeting, Osaka, August 27, 2013.
  11. ◇Poster◇
    Formation of Lactone from diphenic acid by the TiO2-photocatalytic reaction
    Ryusei Oketani, Teruyuki Miyake, Suguru Higashida and Michio Matsumura
    Chemical Society of Japan The 93rd annual meeting, Shiga, March 22-25, 2013.
  12. ◇Poster◇
    Ring-closing reaction of diphenic acid by the TiO2-photocatalytic reaction
    Ryusei Oketani and Suguru Higashida
    Osaka Prefecture University College of Technology Area Interchange Messe 2013, Osaka, March 7, 2013.
  13. ◇Poster◇
    Ring-closing reaction by the photocatalytic reaction using F-modified TiO2
    Ryusei Oketani, Suguru Higashida and Michio Matsumura
    The 22nd characterization class, Osaka, October 12, 2012.
  14. ◇Poster◇
    Effects of amounts of water on formation of lactone by TiO2-photocatalytic reaction
    Ryusei Oketani, Yuichiro Hashimoto, Seiho Jinnai and Suguru Higashida
    Japan Association for College of Technology The 18th annual meeting, Mie, August 25-26, 2012.
  15. ◇Oral◇
    Formation of lactone via photocatalytic reaction with titanium oxide
    Ryusei Oketani and Suguru Higashida
    The 14th College of Technology Chemistry meeting, Osaka, March 13, 2012.

Summer School & Workshop

  1. ◇Oral◇
    Thorough phase diagram study of axially chiral naphthamide and application for chiral resolution
    Ryusei Oketani, Clément Brandel, Pascal Cardinael, Gérard Coquerel
    CORE Workshop – Chirality in Practice,  Groningen, May 20-24, 2019.
  2. ◇Oral◇
    Study of crystallization-induced chiral/diastereomeric resolution
    Ryusei Oketani, Clément Brandel, Pascal Cardinael, Gérard Coquerel
    Summer School Process Analytical Technologies for Crystallization, Manchester, April 16-19, 2018.
  3. ◇Oral◇
    Optimization of Second Order Asymmetric Transformation
    Ryusei Oketani, Clément Brandel, Pascal Cardinael, Gérard Coquerel
    CORE Workshop – Solid State Properties, Cluj=Napoca, November 6-10, 2017.
  4. ◇Poster◇
    Optimization of SOAT: Example of Naphthamide deracemization
    Ryusei Oketani, Clément Brandel, Pascal Cardinael, Gérard Coquerel
    Summer School on Chiral Crystallization, Resolution & Deracemization, Nijmegen, June 3-6, 2017.