Koichiro Takao

Social Implementation

Koichiro Takao

Associate Professor

Actinide ChemistryCoordination ChemistrySolution

Research Projects

  • Development of Wet Chemical Processing of Nuclear Waste Glass to Retrieve Radionuclides (ImPACT)

  • Fundamental Study on Advanced Nuclear Fuel Cycle Based on Coordination and Solution Chemistry

  • Preparation of Pure Uranyl(V) Complexes and Exploring Its Behavior Arising from 5f1 Electronic Configuration

  • Microwave-Assisted Solvent Extraction of Inert Platinum Group Metals

  • Development of Efficient and Versatile Method for Ionic Liquid Preparation and Purification


  • Advances in Engineering, “Microwave-Assisted Solvent Extraction of Inert Platinum Group Metals” (Original Paper: ACS Sustainable Chem. Eng. 2016, 4, 2459-2463.)


Associate Prof.,  Tokyo Institute of Technology


Assistant Prof., Tokyo Institute of Technology


Assistant Prof., Seikei Univ.


Posdoc, FZD (Germany, currently HZDR)


Posdoc, Tokyo Institute of Technology


Bull. Chem. Soc. Jpn. Selected Paper “Efficient and Versatile Anion Metathesis Reaction for Ionic Liquid Preparation by Using Conjugate Acid and Ortho Ester”, Koichiro Takao, Shinobu Takao, Bull. Chem. Soc. Jpn. 2014, 87, 974-981.


Poster Award in 5th Green and Sustainable Chemistry Symposium (2005.3).


Koichiro Takao, Yasuhisa Ikeda “Coordination Chemistry of Actinide Nitrates with Cyclic Amide Derivatives for the Development of the Nuclear Fuel Materials Selective Precipitation (NUMAP) Reprocessing Method” Eur. J. Inorg. Chem. 2020, 3443–3459, Minireview.

Koichiro Takao, Juliane März, Moe Matsuoka, Takanori Mashita, Hiroyuki Kazama, Satoru Tsushima “Crystallization of colourless hexanitratoneptunate(iv) with anhydrous H+ countercations trapped in a hydrogen bonded polymer with diamide linkers” RSC Adv., 2020, 10, 6082-6087.

Tsubasa Inoue, Hiroyuki Kazama, Satoru Tsushima, and Koichiro Takao “Essential Role of Heterocyclic Structure of N-Alkylated 2-Pyrrolidone Derivatives for Recycling Uranium from Spent Nuclear Fuels” Bull. Chem. Soc. Jpn. 2020, 93, 846-853.


Mashita, T.; Tsushima, S.; Takao, K. “Photocatalytic Oxygenation of Cyclohexene Initiated by Excitation of [UO2(OPCyPh2)4]2+ under Visible Light” ACS Omega, 2019, 4, 7194–7199.

Hiroyuki Kazama, Satoru Tsushima, Koichiro Takao “Crystallization of Anhydrous Proton from Acidic Aqueous Solution with Diamide Building Block” Cryst. Growth Des. 2019.19, 11, 6048–6052 

Takao, K.; Kazama, H.; Ikeda, Y.; Tsushima, S. “Crystal Structure of Regularly Th-Symmetric [U(NO3)6]2- Salts with Hydrogen Bond Polymers of Diamide Building Blocks” Angew. Chem. Int. Ed., 201958, 240-243.


Takanori Mashita,  Satoru Tsushima  and   Koichiro Takao  ”Controlling the lability of uranyl(VI) through intramolecular π–π stacking” Dalton Transactions., 2018, 47, 13072-13080.

Takao, K.; Tsushima, S. “The oxidation of borohydrides by photoexcited [UO2 (CO3 )3 ]4” Dalton Trans. 201847, 5149-5152.


Kazama, H.; Tsushima, S.; Ikeda, Y.; Takao, K. “Molecular and Crystal Structures of Uranyl Nitrate Coordination Polymers with Double-Headed 2-Pyrrolidone Derivatives”  Inorg. Chem.  201756, 13530-13534.

Takao, K.; Ikeda, Y.; Kazama, H. “New concept for molecular design of N-substituted 2-pyrrolidone derivatives towards advanced reprocessing method for spent ThO2 fuels” Energy Procedia2017, 131, 157-162.

Takao, K.; Akashi, S. “Exploring Catalytic Activity of Lewis-acidic Uranyl Complexes in Nucleophilic Acyl Substitution of Acid Anhydrides” RSC Adv20177, 12201-12207.


Ikeda, S.; Mori, T.; Ikeda, Y.; Takao, K. “Microwave-Assisted Solvent Extraction of Inert Platinum Group Metals from HNO3(aq) to Betainium-Based Thermomorphic Ionic Liquid” ACS Sustainable Chem Eng20164, 2459-2463.


Takao, K.; Tsushima, S.; Ogura, T.; Tsubomura, T.; Ikeda, Y. “Experimental and Theoretical Approaches to Redox Innocence of Ligands in Uranyl Complexes: What is Formal Oxidation State of Uranium in Reductant of Uranyl(VI)?” Inorg. Chem201453, 5772-5780.