Last Updated :2021/05/10

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
Web Site
A researcher on the synthetic polymer chemistry, especially focusing on the effect of counteranion in the coordination polymerization catalysts.

Basic Information

Major Professional Backgrounds

  • 2010/04, 2012/03, Japan Society for the Promotion of Science, Research Fellow (DC2, PD)
  • 2011/05, 2012/05, Humboldt-Universtaet zu Berlin, Postdoctoral Fellow
  • 2012/06, 2021/03, Hiroshima University, Assistant Professor
  • 2021/04, Hiroshima University, Associate Professor

Educational Backgrounds

  • The University of Tokyo, Faculty of Engineering, Japan, 2002/04, 2006/03
  • The University of Tokyo, Graduate School of Engineering, 2006/04, 2011/03

Academic Degrees

  • Ph. D., The University of Tokyo

Educational Activity

  • 【Bachelor Degree Program】School of Engineering : Cluster 3(Applied Chemistry, Biotechnology and Chemical Engineering)
  • 【Master's Program】Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Applied Chemistry Program
  • 【Doctoral Program】Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Applied Chemistry Program

Research Fields

  • Chemistry;Applied chemistry;Polymer chemistry

Research Keywords

  • Organometallic Chemistry
  • Polymer Chemistry
  • Precision Polymerization

Educational Activity

Course in Charge

  1. 2021, Liberal Arts Education Program1, 1Term, Introductory Seminar for First-Year Students
  2. 2021, Undergraduate Education, Second Semester, Basic Experiments in Chemistry
  3. 2021, Undergraduate Education, 4Term, Exercises in Organic Chemistry
  4. 2021, Undergraduate Education, First Semester, Chemical Experiments I
  5. 2021, Undergraduate Education, 3Term, Advanced Organic Chemistry IV
  6. 2021, Graduate Education (Master's Program) , 4Term, Special Exercises on Applied Chemistry B
  7. 2021, Graduate Education (Master's Program) , 4Term, Special Exercises on Applied Chemistry B
  8. 2021, Graduate Education (Master's Program) , 1Term, Special Exercises on Applied Chemistry A
  9. 2021, Graduate Education (Master's Program) , 1Term, Special Exercises on Applied Chemistry A
  10. 2021, Graduate Education (Master's Program) , 2Term, Special Exercises on Applied Chemistry A
  11. 2021, Graduate Education (Master's Program) , 2Term, Special Exercises on Applied Chemistry A
  12. 2021, Graduate Education (Master's Program) , 1Term, Special Exercises on Applied Chemistry A
  13. 2021, Graduate Education (Master's Program) , 2Term, Special Exercises on Applied Chemistry A
  14. 2021, Graduate Education (Master's Program) , 3Term, Special Exercises on Applied Chemistry B
  15. 2021, Graduate Education (Master's Program) , 3Term, Special Exercises on Applied Chemistry B
  16. 2021, Graduate Education (Master's Program) , 3Term, Special Exercises on Applied Chemistry B
  17. 2021, Graduate Education (Master's Program) , 4Term, Special Exercises on Applied Chemistry B
  18. 2021, Graduate Education (Master's Program) , Academic Year, Special Study on Applied Chemistry
  19. 2021, Graduate Education (Master's Program) , Academic Year, Special Study on Applied Chemistry
  20. 2021, Graduate Education (Doctoral Program) , Academic Year, Special Study on Applied Chemistry

Research Activities

Academic Papers

  1. ★, Neutral, Noncoordinating, and Hydrocarbon-Soluble Protic Cocatalyst for Olefin Polymerization, ACS CATALYSIS, 11(2), 865-870, 20210115
  2. Incorporation of Boronic Acid Functionality into Isotactic Polypropylene and Its Application as a Cross-Linking Point, MACROMOLECULES, 54(3), 1267-1272, 20210209
  3. Synthesis, properties and biodegradation of periodic copolyesters composed of hydroxy acids, ethylene glycol, and terephthalic acid, POLYMER DEGRADATION AND STABILITY, 174, 202004
  4. Synthesis and properties of block copolymers composed of norbornene/higher alpha-olefin gradient segments using ansa-fluorenylamidodimethyltitanium-[Ph3C][B(C6F5)(4)] catalyst system, POLYMER CHEMISTRY, 12(2), 20210114
  5. Synthesis, Properties, and Biodegradability of Thermoplastic Elastomers Made from 2-Methyl-1,3-propanediol, Glutaric Acid and Lactide, LIFE-BASEL, 11(1), 202101
  6. Coordination-Insertion Copolymerization of Norbornene and p-Substituted Styrenes Using Anilinonaphthoquinone-Ligated Nickel Complexes, MACROMOLECULAR CHEMISTRY AND PHYSICS, 221(5), 1900494, 20200305
  7. Copolymerization of norbornene and conjugated dienes using anilinonaphthoquinone-ligated nickel complexes, POLYMER, 187, 122094, 20200120
  8. ★, Precise control of coordination polymerization via the modification of methylaluminoxane (MAO), POLYMER JOURNAL, 52(7), 661-670, 202007
  9. Effect of Ancillary Ligands as a Part of Counteranion in Neodymium-Catalyzed Isoprene Polymerization, ORGANOMETALLICS, 39(10), 1855-1860, 20200526
  10. Synthesis and Properties of Gradient Copolymers Composed of Norbornene and Higher alpha-Olefins Using an ansa-Fluorenylamidodimethyltitanium-[Ph3C][B(C6F5)(4)] Catalyst System, MACROMOLECULES, 53(11), 4323-4329, 20200609
  11. Synthesis, Properties, and Biodegradation of Sequential Poly(Ester Amide)s Containing gamma-Aminobutyric Acid, INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 21(10), 202005
  12. Synthesis of norbornene/divinylbenzene copolymers catalyzed by anilinonaphthoquinone-ligated nickel complexes and their applications for the synthesis of graft polymers, JOURNAL OF POLYMER SCIENCE, 58(11), 1564-1570, 20200601
  13. Crystal structure of di-mu-trihydro(pentafluorophenyl)borato-tetrakis(tetrahydrofuran)disodium, ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, 76(2), 145-147, 20200107
  14. Norbornadiene homopolymerization and norbornene/norbornadiene/1-octene terpolymerization by ansa-fluorenylamidotitanium-based catalysts, POLYMER CHEMISTRY, 11(42), 6803-6810, 20201114
  15. Synthesis and properties of biodegradable thermoplastic elastomers using 2-Methyl-1,3-propanediol, succinic acid and lactide, POLYMER DEGRADATION AND STABILITY, 181, 109353, 202011
  16. Copolymerization of Ethylene and Fluoroalkylnorbornene Using Highly Active ansa-(Fluorenyl)(amido)titanium-Based Catalysts, MACROMOLECULAR CHEMISTRY AND PHYSICS, 220(19), 1900306, 20191004
  17. Chain-walking polymerization of 3-heptene with phenyl substituted alpha-diimine nickel catalysts, POLYMER, 181, 121801, 20191024
  18. Effect of the number of arms on the mechanical properties of a star-shaped cyclic olefin copolymer, POLYMER CHEMISTRY, 10(41), 5578-5583, 20191107
  19. Copolymerization of Norbornene and Styrene with Anilinonaphthoquinone-Ligated Nickel Complexes, POLYMERS, 11(7), 1100, 20190628
  20. ★, Preparation of Methylaluminoxane from CO2 and Me3Al, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2019(18), 2392-2395, 20190515
  21. Stereospecific polymerization of conjugated dienes using neodymium alkylborohydride complexes, DALTON TRANSACTIONS, 48(21), 7267-7273, 2019
  22. Cis-1,4 Specific Polymerization of 1,3-Butadiene Using PNP-pincer Ligated Iron(II) Complexes, CHEMISTRY LETTERS, 48(6), 525-528, 2019
  23. Optically Transparent Functional Polyolefin Elastomer with Excellent Mechanical and Thermal Properties, ACS MACRO LETTERS, 8(3), 299-303, 2019
  24. Effect of Added Phenols and Silanol on the Cocatalyst Activity of Methylaluminoxane, KOBUNSHI RONBUNSHU, 75(6), 551-556, 2018
  25. Efficient ethylene copolymerization with polar monomers using palladium anilinonaphthoquinone catalysts, POLYMER CHEMISTRY, 9(45), 5476-5482, 2018
  26. Efficient control of ethylene-norbornene copolymerization behavior of a fluorenylamido-ligated titanium complex: substituent effects of the amido ligand and copolymer properties, POLYMER CHEMISTRY, 9(35), 4492-4497, 2018
  27. Reversible star assembly of polyolefins using interconversion between boroxine and boronic acid, POLYMER CHEMISTRY, 9(27), 3774-3779, 2018
  28. Chain-Walking Polymerization of Linear Internal Octenes Catalyzed by alpha-Diimine Nickel Complexes, ORGANOMETALLICS, 37(9), 1358-1367, 20181214
  29. Selective synthesis of highly soluble cyclic olefin copolymers with pendant vinyl groups using 1,5-hexadiene as a comonomer, POLYMER, 136, 109-113, 2017
  30. Highly Robust Nickel Catalysts Containing Anilinonaphthoquinone Ligand for Copolymerization of Ethylene and Polar Monomers, MACROMOLECULES, 50(23), 9216-9221, 2017
  31. Synthesis of Stereodiblock Polybutadiene Using Cp*Nd(BH4)(2)(thf)(2) as a Catalyst, CATALYSTS, 7(10), 284-291, 2017
  32. Living polymerization of higher 2-alkene with alpha-diimine nickel catalysts: Synthesis and characterization of high molecular weight poly(2-alkene)s, POLYMER, 127, 88-100, 2017
  33. ★, An Alternative Method for the Preparation of Trialkylaluminum-Depleted Modified Methylaluminoxane (dMMAO), Macromolecules, 50(15), 5989-5993, 2017
  34. Synthesis of highly thermostable norbornene-isoprene-1-octene terpolymer with titanium catalyst, JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 55(13), 2136-2140, 2017
  35. Controlled Ring-Opening Polymerization of L-Lactide and epsilon-Caprolactone Catalyzed by Aluminum-Based Lewis Pairs or Lewis Acid Alone, JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 55(2), 297-303, 2016
  36. Theoretical investigation of the mechanism of syndiospecific propylene polymerization using ansa-dimethylsilylene(fluorenyl)(amido)titanium complexes, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 823, 112-115, 2016
  37. Precision Chain-Walking Polymerization of trans-4-Octene Catalyzed by -Diimine Nickel(II) Catalysts Bearing ortho-sec-Phenethyl Groups, MACROMOLECULAR RAPID COMMUNICATIONS, 37(16), 1375-1381, 2016
  38. Synthesis of Highly Branched Polyolefins Using Phenyl Substituted alpha-Diimine Ni(II) Catalysts, POLYMERS, 8, 160, 2016
  39. ★, Synthesis of stereodiblock polyisoprene consisting of cis-1,4 and trans-1,4 sequences by using a neodymium catalyst: change of the stereospecificity triggered by an aluminum compound, POLYMER CHEMISTRY, 7, 1239, 2016
  40. Facile Synthesis of Novel Polyethylene-Based A-B-C Block Copolymers Containing Poly(methyl methacrylate) Using a Living Polymerization System, MACROMOLECULAR RAPID COMMUNICATIONS, 37, 227, 2015
  41. Structure-stereospecificity relationships of propylene polymerization using substituted ansa-silylene(fluorenyl)(amido) titanium complexes, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 804, 95, 2015
  42. The preparation of boron-containing aluminoxanes and their application as cocatalysts in the polymerization of olefins, POLYMER JOURNAL, 48, 67, 2015
  43. Stereospecific Ring-Opening Metathesis Polymerization of Norbornene Catalyzed by Ruthenium and Osmium Complexes with Chelating Hetero-Donor Ligands, KOBUNSHI RONBUNSHU, 72, 460, 2015
  44. Room-temperature Suzuki-Miyaura cross-coupling reaction with alpha-diimine Pd(II) catalysts, APPLIED ORGANOMETALLIC CHEMISTRY, 29, 771, 2015
  45. Synthesis of Polystyrene-Grafted Cycloolefin Copolymer, Polymer, 70, 252, 2015
  46. Synthesis of Aliphatic Polyesters via Ring-Opening Polymerization of Macrocyclic Oligoesters, Macromol. Symp., 350, 7, 2015
  47. Synthesis and application of alpha-diimine Ni(II) and Pd(II) complexes with bulky steric groups to polymerization of ethylene and methyl methacrylate, J. Mol. Catal. A: Chem., 398, 231, 2014
  48. Synthesis of Biodegradable Thermoplastic Elastomers from epsilon-Caprolactone and Lactide, J. Polym. Sci. Part A: Polym. Chem., 53, 489, 2014
  49. Pseudo-living copolymerization of norbornene and omega-alkenylborane - Synthesis of monodisperse functionalized cycloolefin copolymer, Polymer, 56, 218, 2014
  50. Ethylene-Propylene Copolymerization Behavior of ansa-Dimethylsilylene(fluorenyl)(amido)dimethyltitanium Complex: Application to Ethylene-Propylene-Diene or Ethylene-Propylene-Norbornene Terpolymers, J. Polym. Sci. Part A: Polym. Chem., 53, 685, 2014
  51. Synthesis and Properties of Poly(epsilon-carprolactone)-based Poly(ester-urethane)s Having Quaternary Ammonium Groups, J. Jpn. Inst. Energy, 93, 916, 2014
  52. Synthesis and Thermal, Mechanical, and Optical Properties of A-B-A or A-B Block Copolymers Containing Poly(norbornene-co-1-octene), J. Polym. Sci. Part A: Polym. Chem., 52, 267, 2014
  53. Precise Synthesis of Cycloolefin Copolymer Using ansa-Silylene(fluorenyl)(amido)dimethyltitanium Complex as a Catalyst, J. Syn. Org. Chem. Jpn., 72(2), 118, 2014
  54. Synthesis of a Multiblock Copolymer of cis-1,4Polybutadiene and Poly( 3-buten-1-ol), Macromol. Chem. Phys., 215, 888, 2014
  55. New nickel(II) diimine complexes bearing phenyl and sec-phenethyl groups: synthesis, characterization and ethylene polymerization behaviour, Appl. Organomet. Chem., 28, 477, 2014
  56. Synthesis and Properties of Polylactide-based Poly(ester-urethane)s with Ionic Groups, J. Jpn. Inst. Energy, 93, 921, 2014
  57. Synthesis of high-molecular weight block copolymers of norbornene and propylene with methyl methacrylate initiated by a fluorenylamido titanium complex, Polym. Chem., 4, 3974, 2013
  58. Copolymerization of Ethylene with Isobutylene and Limonene Catalyzed by Titanium Complexes with Various ansa-(Fluorenyl)(alkylamido) Ligand, Engineering Journal, 17, 7, 2013
  59. Synthesis and Characterization of Polyesters by Polycondensation of Itaconic Acid and Isosorbide, KOBUNSHI RONBUNSHU, 70, 559, 2013
  60. Copolymerization of Norbornene with omega-Alkenylaluminum as a Precursor Comonomer for Introduction of Carbonyl Moieties, J. Polym. Sci. Part A: Polym. Chem., 51, 5085, 2013
  61. Synthesis and Properties of Cationic Ionomers from Poly(ester-urethane)s Based on Polylactide, J. Polym. Sci. Part A: Polym. Chem., 51, 4423, 2013
  62. Bis(phenoxy-azo)titanium(IV) Complexes: Synthesis, Structure, and Catalytic Activity in Styrene Polymerization, Organometallics, 31, 4216, 2012
  63. Mechanistic Studies on the Reversible Hydrogenation of Carbon Dioxide Catalyzed by an Ir-PNP Complex, Organometallics, 30, 6742, 2011
  64. Catalytic Hydrogenation of Carbon Dioxide Using Ir(III)-Pincer Complexes, J. Am. Chem. Soc., 131, 14168, 2009
  65. Synthesis of alpha-Heteroarylpropanoic Acid via Asymmetric Hydroformylation Catalyzed by Rh(I)-(R,S)-BINAPHOS and the Subsequent Oxidation, J. Org. Chem., 72, 8671, 2007
  66. Asymmetric Hydroformylation of Vinylfurans Catalyzed by {(11bS)-4-{[(1R)-2'-Phosphino[1,1'-binaphthalen]-2-yl]oxy}dinaphtho[2,1-d:1',2'-f]-[1,3,2]dioxaphosphepin}rhodium(I) [RhI{(R,S)-binaphos}] Derivatives, Helv. Chim. Acta, 89, 1681, 2006

Publications such as books

  1. 2012, Comprehensive Chirality, Vol 5: Synthetic Methods IV - Asymmetric Oxidation Reduction, C-N, 5.14 Reduction: Hydroformylation C-H and C-C, Elsevier, 2012, Joint work, Ryo Tanaka, Kyoko Nozaki, 334-342
  2. 2014, Encyclopedia of Polymeric Nanomaterials, Coordination Polymerization (Styrene and Polar Vinyl Monomers), Springer, 2014, Joint work, Ryo Tanaka, Takeshi Shiono, 474-480

Invited Lecture, Oral Presentation, Poster Presentation

  1. Change of the stereoselectivity by the addition of Mg/Al compound in neodymium-mediated isoprene polymerization: synthesis of stereoblock polyisoprene, The XXVI International Conference on Organometallic Chemistry (ICOMC2014), 2014/07/17, Without Invitation, English, Sapporo, Japan
  2. Preparation of boron-containing aluminoxane as a cocatalyst of olefin polymerization, Ryo Tanaka, IUPAC 11th International Conference on Advanced Polymers via Macromolecular Engineering (APME2015), 2015/10/21, Without Invitation, English, Yokohama, Japan
  3. Effect of the protic source on the preparation of aluminoxane and its activation behavior of olefin polymerization catalysts, Ryo Tanaka, World Polyolefin Congress (WPOC 2015), 2015/11/24, With Invitation, English, Tokyo, Japan
  4. Synthesis of Stereoblock Polyisoprene with Neodymium catalyst, Ryo Tanaka, The International Symposium on Homogeneous Catalysis (ISHC XX), 2016/07/15, Without Invitation, English, Kyoto, Japan
  5. Synthesis of stereoblock polydienes using Nd-based catalyst, Ryo Tanaka, The International Rubber Conference 2016 (IRC2016), 2016/10/28, Without Invitation, English, Kitakyushu, Japan
  6. Effect of counteranion in the polymerization of conjugated dienes using cationic neodymium catalyst, Ryo Tanaka Yuto Shinto Yuushou Nakayama Takeshi Shiono, The 11th SPSJ International Polymer Conference (IPC2016), 2016/12/16, Without Invitation, English, Fukuoka, Japan
  7. Control of stereospecificiy of conjugated diene polymerization using neodymiumbased catalyst: from atactic polymer to stereoblock polymer, Ryo Tanaka, International Symposium on Pure & Applied Chemistry 2017 (ISPAC 2017), 2017/06/10, With Invitation, English, Ho Chi Minh City, Vietnam
  8. An alternative preparation method for trialkylaluminum-depleted modified methylaluminoxane, Ryo Tanaka, Asian Polyolefin Workshop 2017, 2017/10/25, With Invitation, English, Tianjin, China
  9. Synthesis and their physical properties of star-shaped cyclic olefin copolymer, Ryo Tanaka, The 12th International Polymer Conference (IPC2018), 2018/12/06, Without Invitation, English, Hiroshima, Japan
  10. Chemistry of Methylaluminoxane - Efficient preparation method and composition control, Ryo Tanaka, The 8th Asian Polyolefin Workshop (APO2019), 2019/12/05, Without Invitation, English, Higashi-hiroshima, Japan


  1. 2009/11, Student Presentation Prize in 59th JSCC Symposium
  2. 2012/06, Reaxys PhD Prize 2012 Finalist
  3. 2013/12, Mitsui Chemical Award in Synthetic Organic Chemistry, Japan
  4. 2015/04, CSJ Presentation Award
  5. 2016/12, IPC2016 RSC Polymer Chemistry Award
  6. 2018/04, UBE Industries Research Grant Award
  7. 2019/05, Award for Encouragement of Research in Polymer Science, the Society of Polymer Science, Japan

External Funds

Acceptance Results of Competitive Funds

  1. Mitsui Chemical Award in Synthetic Organic Chemistry, Japan, 2013
  2. KAKENHI, Grant-in-Aid for Young Scientists (B), 2014, 2016
  3. Chemical Evalution and Research Institute, Japan, 2014
  4. YMC co. ltd., 2015
  5. The Hattori Hokokai Foundation, 2015
  6. Yoshida Foundation for Science and Technology, 2015
  7. Electric Technology Research Foundation of Chugoku, 2017
  8. Furukawa Foundation, 2017
  9. KAKENHI(Grant-in-Aid for Early-Career Scientists), 2018, 2020
  10. Ube Industries Foundation, 2018
  11. Daiichi Kigenso Kagaku Kogyo Research Grant, 2018, 2020
  12. Tonen General Sekiyu Foundation, 2020
  13. The Iwatani Naoji Foundation, 2020