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Inorganic Synthetic Chemistry Lab
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A synthetic chemistry lab that creates new materials using metal complexes and organic cage molecules.
AboutAbout the lab
Creating materials with new structures and properties
The Inorganic Synthetic Chemistry Lab makes full use of coordination, inorganic, and organic synthetic chemistry to create materials with new structures, molecular arrangements, and properties.
Its main research covers the synthesis of inorganic nanoparticles using organic cage molecules, the properties of polynuclear complexes in which metal ions are linked by cyanide ions, and the development of caloric effect materials based on complex molecules.
The lab's website highlights as an attraction that students can carry out, with their own hands from start to finish, the whole process of synthesizing a new compound and clarifying its structure and properties.
The lab's website also presents it under the name "Nihei Lab."
Key terms
- Organic cage molecules
- Cage-shaped organic molecules. By changing the structure of the constituent organic molecules, the size and shape of the internal cavity can be set
- Inorganic nanoparticles
- Particles of metals, metal oxides, and similar materials. At sizes of 1 to a few nm, they have been found to show unusual physical properties
- Spin transition
- A phenomenon in which electrons move when triggered by heat or light, switching the magnetic state between paramagnetic and diamagnetic
- Caloric effect
- An effect used in cooling technology. Among solid refrigerants, those using magnetic fields, pressure, or electric fields are attracting attention
ResearchResearch themes
The Nihei Lab uses coordination, inorganic, and organic synthetic chemistry to create materials with new structures, molecular arrangements, and properties. Its research covers the synthesis of inorganic nanoparticles using organic cage molecules as reaction fields, the physical properties of cyanide-bridged polynuclear complexes, and the development of caloric effect materials based on complex molecules.
*Illustrative imageSynthesizing Inorganic Nanoparticles with Cage Molecules
Nanoparticles of 1 to a few nm tend to aggregate, and methods using surface-protecting ligands make it difficult to produce particles of a predicted size. Using the interior of cage-shaped organic molecules as a reaction field, the lab synthesizes iron oxide nanoparticles about 2 nm in diameter and gold nanoparticles of about 2 nm.
*Illustrative imageProperties of Cyanide-Bridged Polynuclear Complexes
The lab studies polynuclear complexes that can be regarded as fragments cut out of Prussian blue analogues. In Fe-Co complexes, heat or light triggers a spin transition accompanied by electron transfer, and the lab has also succeeded in a rearrangement in which the dimensionality of the molecular units is controlled.
*Illustrative imageCaloric Effect Materials Based on Complex Molecules
Cooling technology relies on gas compression, which has a high environmental impact, and new refrigeration technologies using solid refrigerants are being studied. Using highly designable complex molecules, the lab designs, synthesizes, and evaluates molecular magnetocaloric effect materials that can be used for magnetic refrigeration.
MembersFaculty
The Inorganic Synthetic Chemistry Lab consists of faculty members and doctoral, master's, and undergraduate students.As of 2026
- ProfessorMasayuki Nihei
- Associate ProfessorTakuya Shiga
- Assistant ProfessorNozomi Mihara
VoicesStudent voices
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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: “Pigments in test tubes in UCL Chemistry - London, United Kingdom” UCL Mathematical and Physical Sciences from London, UK / CC BY 2.0 (cropped)
- Synthesizing Inorganic Nanoparticles with Cage Molecules: “Platinum nanoparticles” PieroSpeleo / CC BY-SA 4.0 (cropped)
- Properties of Cyanide-Bridged Polynuclear Complexes: “Dehydrated-Prussian-blue-unit-cell-a-centroids-tilt-3D-bs-17” Ben Mills / Public domain (cropped)
- Caloric Effect Materials Based on Complex Molecules: “Neodimijski magneti, (Neodymium magnets)” Suradnik50 / CC BY-SA 3.0 (cropped)
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