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Correlated Molecular Functions Lab
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The lab creates new physical properties from radicals with unpaired electrons and from metal complexes.
AboutAbout the lab
Enjoy the diversity of materials science and discover new principles
The Kusamoto Lab designs and synthesizes new radicals with unpaired electrons and new magnetic metal complexes, and studies how to create functions and physical properties that have never existed before.
The lab synthesizes new materials and clarifies their structures, physical properties, and electronic states. When it encounters unexpected properties or behavior it cannot explain, it asks "why?", aiming to discover the principles hidden in the science of material properties.
The lab studies the luminescence of radicals and the relationship between spin and emission.
On the lab's website, it is introduced under the name "Correlated Molecular Functions Group, Kusamoto Lab."
Key terms
- Radical
- A molecule with an unpaired electron (an electron that is not part of a pair). One of the types of substances this lab focuses on.
- Metal complex
- A compound formed when molecules bind to a metal ion. This lab also works with metal complexes that have magnetic properties.
- Magnetic field dependence
- A property in which the intensity of emission changes depending on the strength of the magnetic field. It is presented as a phenomenon in which spin and luminescence work together.
NewsLab news
A study on magnetic-field-responsive luminescence of paramagnetic manganese complexes was published in Angewandte Chemie
A master's student's study on spin-correlated luminescence of radicals generated by mechanical stimulation was published in Angewandte Chemie
Lecturer Ryota Matsuoka's study on "excimer-like" excited species of luminescent diradicals was published in JACS
A doctoral student's study on the luminescence of carbazole-containing monoradicals was published in Chemistry Letters
A master's student received the Best Presentation Award Gold Prize at the 5th Regional Meeting of the Transformative Research Areas (A) "1000 Tesla Science"
ResearchResearch themes
To uncover new principles hidden in materials science and the science of material properties, the lab develops new materials based on molecules with unpaired electrons (radicals) and magnetic metal complexes, and investigates how their physical properties arise. It synthesizes new materials and clarifies their structures, physical properties, and electronic states. The lab places importance on not overlooking unexpected behavior or data that seems off, and on asking "why?"
*Illustrative imageLuminescent radicals
Radicals have been regarded as substances that harm luminescence, and understanding of their emission has not progressed. Using PyBTM, a luminescent radical that stays chemically stable under light irradiation, the lab investigates the fundamentals of doublet-based emission.
*Illustrative imageEnhancing and expanding luminescence with complexes
It has been reported that luminescent radicals lose their emission when they coordinate to metal ions. In contrast, the lab is working on using complex formation to improve, diversify, and add functions to luminescence. It has also been reported that a complex of PyBTM and gold ions shows fluorescence in solution.
*Illustrative imageSpin and luminescence working together
Molecular crystals doped with PyBTM change their emission color depending on the doping amount, and a sample doped at 10 wt% has been reported to show a marked magnetic field dependence at 4.2 K. This is a phenomenon in which spin and luminescence work together, and the relationship between magnetic field and luminescence is also covered in recent papers.
MembersFaculty
The Kusamoto Lab members consist of faculty, a secretary, international students, and students in the doctoral program, the master's program, and the undergraduate program.As of 2026
- ProfessorTetsuro Kusamoto
- LecturerRyota Matsuoka
- Assistant ProfessorAsato Mizuno
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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: “Lodestone (Magnet Cove Complex, mid-Cretaceous, 96-102 Ma; Magnet Cove, Arkansas, USA) 4” James St. John / CC BY 2.0 (cropped)
- Luminescent radicals: “Fluorescence of Riboflavin in Water” Ksenia Kandurova, Yurii Kandurov, Dmitry Stavtsev / CC BY 4.0 (cropped)
- Enhancing and expanding luminescence with complexes: “CdSeNanoplatelets” Kabotin / CC BY-SA 4.0 (cropped)
- Spin and luminescence working together: “Dewar Quantum Setup” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (Surface and Interface Functional Chemistry Lab): “Electrode 2 (PSF)” Pearson Scott Foresman / Public domain (cropped)
- Related lab (Synthetic Organic Chemistry Lab): “La fulminaterie” Patrimoinesurvillois / CC BY-SA 4.0 (cropped)
- Related lab (Organic Materials Chemistry Lab): “Laboratory Glasswares” Ajay Kumar Chaurasiya / CC BY-SA 4.0 (cropped)
- Related lab (Biofunctional Chemistry Lab): “Sugar crystals lie” Star61 / CC BY-SA 4.0 (cropped)
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