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Tomita-Hifumi Lab
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The lab develops new polymer materials by taking on new ways of making them.
AboutAbout the lab
New polymer materials, approached through new ways of making them.
The Tomita-Hifumi Lab studies the creation of reactive polymers and their applications, based on organic chemistry and organometallic chemistry.
The lab develops new polymerization reactions themselves in order to make materials with structures and functions never seen before.
Its main pillars are living polymerization of allenes, polymers containing metals in the main chain, and polycondensation that joins multiple components at once.
The polymers it makes are being extended to materials that modify the surfaces of inorganic materials and to materials with optical and electrical properties.
Key terms
- Living polymerization
- A polymerization in which the growing chain keeps extending without stopping midway. It can produce polymers of uniform length
- Reactive polymer
- A polymer that can be reacted with other reagents after it is made, so that its properties can be changed
- Metallacycle
- A structure in which a metal atom is built into part of a ring
NewsLab news
A student received the Best Presentation Award at the Lecture and Discussion Meeting on Network Polymers
A student received the Excellent On-Demand Presentation Award at the Annual Meeting of the Society of Polymer Science, Japan
A student received the Excellent Presentation Award at the Kanagawa District Lecture Meeting of the Kanto Branch of the Society of Polymer Science, Japan
A student received the Encouragement Award at the Photocatalysis Symposium
ResearchResearch themes
Based on organic chemistry and organometallic chemistry, the lab develops polymerization methods that lead to new concepts and creates new polymer materials. Its research rests on three pillars: living polymerization of allene derivatives, reactive polymers with metals in the main chain, and multicomponent polycondensation.
*Illustrative imageLiving Polymerization of Allenes
The lab pioneered coordination polymerization of allenes using allylnickel catalysts. Because the reaction proceeds by a living mechanism, it yields polymers of uniform size, is little affected by the nature of the substituents, and allows precise control of the main-chain structure over a wide range. The lab is extending this to the synthesis of helical polymers and of microparticles with uniform particle size.
*Illustrative imagePolymers with Metals in the Main Chain
Focusing on the diverse reactivity of bonds between transition metals and carbon, the lab synthesizes organometallic polymers that have metallacycle structures in the main chain. Reacting these with small-molecule reagents gives polymers in which heteroatoms such as tin and phosphorus are directly connected to the π-electron system.
*Illustrative imagePolycondensation Joining Multiple Components
The lab develops reactions such as transition-metal-catalyzed three-component coupling and extends them to various multicomponent polycondensations. Because three or more components join in an orderly way in a single step, polymers with diverse structures can be built from simple monomers.
MembersFaculty
The members of the Tomita-Hifumi Lab consist of faculty members, students in the doctoral, master's, and undergraduate programs, and secretaries.As of 2026
- ProfessorIkuyoshi TomitaPublications ↗
- Associate ProfessorRyoyu HifumiPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ferrocene sublimation- Final product” Kate7234 / CC0 (cropped)
- Living Polymerization of Allenes: “A lunarlike polymeric surface in microscale” D Soulas / CC BY-SA 4.0 (cropped)
- Polymers with Metals in the Main Chain: “MetallacyclesRedone” Smokefoot / Public domain (cropped)
- Polycondensation Joining Multiple Components: “Polypropylene Pellets - DPLA - f7c2fa29d14525ce21219452f4a1a316” Quantum Chemical Corporation / CC BY 4.0 (cropped)
- Related lab (伊藤研究室): “Diamond by Peter Smyth” Peter Smyth / CC0 (cropped)
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