Development of New Cooperative Catalysts for Polymerization

• Project/Area Number: 25870213
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Polymer chemistry; Synthetic chemistry
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Nakano Koji 東京農工大学, 工学(系)研究科(研究院), 准教授 (70345099)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 重合触媒 / 開環重合 / エポキシド / 二酸化炭素 / ラクトン

Outline of Final Research Achievements

New multinuclear metal complexes were developed for the copolymerization of epoxides with carbon dioxide. Some multinuclear cobalt-salen complexes with a benzene ring as a linker were synthesized. The substitution position was found to have a great impact on catalytic activity, and the ortho-substituted dinuclear cobalt-salen complex demonstrated highest activity. The combination of absolute configuration of salen ligands were also found to affect catalytic activity. The optimized complex exhibited higher catalytic activity than the previously reported cobalt-salen complex with an alkylene linker.

Research Products

• [Journal Article] Facile Estimation of Catalytic Activity and Selectivities in Copolymerization of Propylene Oxide with Carbon Dioxide Mediated by Metal Complexes with Planer Tetradentate Ligand (2014)
  • Author(s): Takahiro Ohkawara, Kohei Suzuki, Koji Nakano, Seiji Mori, and Kyoko Nozaki
  • Journal Title: J. Am. Chem. Soc. Volume: 136 Issue: 30 Pages: 10728-10735
  • DOI: 10.1021/ja5046814
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Copolymerization of Epoxides with CO2 Catalyzed by Multinuclear Cobalt Complexes (2015)
  • Author(s): Yo Hiranoi, Koji Nakano
  • Organizer: The 2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)
  • Place of Presentation: Hawaii Convention Center (Honolulu, USA)
  • Year and Date: 2015-12-16
• [Presentation] 複核金属錯体をもちいたエポキシドと二酸化炭素との交互共重合 (2015)
  • Author(s): 平野井 陽・中野 幸司・西岡 聖司
  • Organizer: 平成27年度繊維学会年次大会
  • Place of Presentation: タワーホール船堀（Edogawa-ku, Tokyo）
  • Year and Date: 2015-06-11
• [Presentation] Aliphatic Polycarbonates from Epoxides and Carbon Dioxide: Syntheses, Properties, and Their Applications (2015)
  • Author(s): Koji Nakano
  • Organizer: ISPlasma2015 / IC-PLANTS2015
  • Place of Presentation: 名古屋大学東山キャンパス（名古屋市）
  • Year and Date: 2015-03-30
  • Invited
• [Presentation] Synthesis and Properties of Aliphatic Polycarbonates from Epoxides and CO2 (2014)
  • Author(s): Koji Nakano
  • Organizer: The 8th International Conference on Materials Science and Technology
  • Place of Presentation: バンコク（タイ）
  • Year and Date: 2014-12-15
  • Invited
• [Presentation] 側鎖への官能基導入によるエポキシドと二酸化炭素との交互共重合体の分解特性制御 (2014)
  • Author(s): 丹野理華・中野幸司
  • Organizer: 第63回高分子討論会
  • Place of Presentation: 長崎大学文京キャンパス（長崎市）
  • Year and Date: 2014-09-24
• [Presentation] サステイナブル高分子の合成に向けた重合触媒の開発
  • Author(s): 中野幸司
  • Organizer: 第62回高分子討論会
  • Place of Presentation: 金沢大学角間キャンパス（石川県金沢市）
  • Invited