1. Statically and Dynamically Flexible Hydrogen-bonded Frameworks Based on 4,5,9,10-Tetrakis(4-carboxyphenyl)pyrene
    Taito Hashimoto, Ryusei Oketani, Asato Inoue, Kohei Okubo, Kouki Oka, Norimitsu Tohnai, Kazuhide Kamiya, Shuji Nakanishi, Ichiro Hisaki*

    Chem. Commun. 202359, 7224-7227. Open Access
  2. Construction of Hydrogen-bonded Crystalline Frameworks Using Tetrakis(carboxyphenyl)dimethyl-dihydropyrene Derivative
    Yuna Yamaguchi, Kouki Kasuya, Ryusei Oketani, Ichiro Hisaki*

    Chem. Lett. 202352, 542-545.
  3. Overcoming a Solid Solution System on Chiral Resolution: Combining Crystallization and Enantioselective Dissolution
    Ryusei Oketani*, Koki Shiohara, Ichiro Hisaki*

    Chem. Commun. 2023, 59, 6175-6178.  Open Access (Preprint)
    Selected for Inside Front Cover
  4. Use of Conglomerates Mixed Crystals to Deracemize a Stable RacemicCompound-Forming System
    Clément Pinètre, François-Xavier Gendron, Reiko Kuroda, Ryusei Oketani, Christian Aupetit, Thierry Buffeteau, Gérard Coquerel*

    Chem. Eur. J. 2023, e202300441. 
  5. Isomeric Effect of Naphthyl Spacers on Structures and Properties of Isostructural Porous Crystalline Frameworks
    Yuto Suzuki, Mao Yamaguchi, Ryusei Oketani, Ichiro Hisaki*

    Mater. Chem. Front. 2023, 7, 106-116.
    Selected to HOT Article 
  6. Single Crystalline, Non-stoichiometric Cocrystals of Hydrogen-Bonded Organic Frameworks
    Taito Hashimoto, Ryusei Oketani, Masaki Nobuoka, Shu Seki, Ichiro Hisaki*

    Angew. Chem. Int. Ed. 2023, 62, e202215836.
    Selected for HOT Paper
    Selected for Back Cover Picture
  7. Quinoxaline-annelated Hexadehydro[12]annulene: Use of A New Building Block to Construct a Hydrogen-bonded Hexagonal Molecular Network
    Mayu Kobayashi, Haruka Kubo, Ryusei Oketani, Ichiro Hisaki*

    CrystEngComm, 2022, 24, 5036-5040.
  8. Slip-Stacking of Benzothiadiazole Can Provide a Robust Structural Motif for Porous Hydrogen-bonded Organic Frameworks
    Zhuxi Yang, Akinori Saeki, Asato Inoue, Ryusei Oketani, Kazuhide Kamiya, Shuji Nakanishi, Takayoshi Nakamura,* Ichiro Hisaki*

    Cryst. Growth Des. 2022, 22, 4472-4479.
  9. Geometrically Mismatched Hydrogen-bonded Framework Composed of Tetratopic Carboxylic Acid
    Zhuxi Yang, Taito Hashimoto, Ryusei Oketani, Takayoshi Nakamura,* Ichiro Hisaki*
    Chem. Eur. J. 2022, e202201571.

    Selected to HOT Paper 
  10. Order-Disorder Phase Transition between High and Low Z′ Crystal Structures of P1 Space Group
    Ryusei Oketani*, Hiroki Takahashi, Simon Clevers, Akira Oyamada, Ichiro Hisaki, Gerard Coquerel, Kazuaki Yamanaka, Hirohito Tsue

    Cryst. Growth Des. 2022, 22, 2230-2238.
    Selected to Front Cover (April 2022, Volume 22, Number 4) 
    To be published as part of a Crystal Growth and Design virtual special issue on Emerging Investigators 2022
  11. The Polymorphism of 2-benzoyl-N,N-diethylbenzamide
    Lygia S. Moraes*, Jie Liu, Elumalai Gopi, Ryusei Oketani, Alan R. Kennedy, Yves H. Geerts*

    Crystals 2021, 11, 1004.
  12. Two-dimensional Porous Framework Assembled through Hydrogen-bonds and Dipole-dipole Interactions
    Zhuxi Yang, Ayana Moriyama, Ryusei Oketani, Takayoshi Nakamura, Ichiro Hisaki*
    Chem. Lett. 2021, 50, 1909-1912.
  13. Quasi single-crystalline transformation of porous frameworks accompanied by interlayer rearrangements of hydrogen bonds
    Haruka Kubo, Ryusei Oketani, Ichiro Hisaki*

    Chem. Commun. 2021, 57, 8568-8571.
    Selected to Front Cover 
    (Volume 57, Issue 69) 
  14. Deracemization in a complex quaternary system with a second-order asymmetric transformation using phase diagram studies
    Ryusei Oketani, Francesco Marin, Paul Tinnemans, Marine Hoquante, Anne Laurent, Clément Brandel, Pascal Cardinael, Hugo Meekes, Elias Vlieg, Yves Geerts, Gérard Coquerel*

    Chem. Eur. J., 2019. 25, 13890-13898. 
    Selected to
    Hot Paper and Front Cover (Volume 25, Issue 61) 
    Cover Profile (Chem. Eur. J. 2019, 25, 13837)
    is also available.
  15. Resolution of an atropoisomeric naphthamide by second-order asymmetric transformation: A highly productive technique
    Ryusei Oketani
    , Marine Hoquante, Clément Brandel, Pascal Cardinael, and Gérard Coquerel*

    Org. Process Res. Dev., 2019, 23, 1197-1203.
  16. NH-form of a threonine-based Schiff base in the solid state
    Ryusei Oketani, Hiroki Takahashi, Marine Hoquante, Clément Brandel, Pascal Cardinael, Gérard Coquerel*
    J. Mol. Struct., 2019, 1184, 36-40.
  17. Effect of Substituents on TiO2 photocatalytic Oxidation of trans-Stilbenes
    Teruyuki Miyake, Yuichiro Hashimoto, Seihou Jinnai, Ryusei Oketani, and Suguru Higashida*
    Bull. Chem. Soc. Japan, 2019, 92, 55-60.
  18. Practical Role of Racemization Rates in Deracemization Kinetics and Process Productivities
    Ryusei Oketani, Marine Hoquante, Clément Brandel, Pascal Cardinael, and Gérard Coquerel*
    Cryst. Growth Des., 2018, 18, 6417-6420.
  19. Formation of Lactones by Decarboxylation of Aromatic Diacids via TiO2-Mediated Photocatalytic Reactions in Acetonitrile Solution
    Ryusei Oketani, Teruyuki Miyake, Seihou Jinnai, Takuya Fukui, Hidetaka Tsujimoto, Michio Matsumura, and Suguru Higashida*

    Chem. Lett. 2016, 45, 801-803.

Book chapter

  1. Azacalixarene: an ever-growing class in the calixarene family
    Hirohito Tsue* and Ryusei Oketani
    In Advances in Organic Crystal Chemistry: Comprehensive Reviews 2015, R.Tamura and M.Miyata (eds.), Springer, Chapter 13, 241-261.