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Hiroto Lab
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A lab that makes curved, twisted, three-dimensional molecules with its own hands.
AboutAbout the lab
Diving deep into the sea of organic chemistry.
The Hiroto Lab is an organic chemistry lab that focuses on molecular structure and creates, with its own hands, molecules with truly new structures and functions.
The lab aims to elucidate the principles of nature underlying this work and to create new functions by using them.
The lab makes π-conjugated molecules, which were mostly planar, in three-dimensional shapes, and brings out properties that planar molecules do not have.
Undergraduates are assigned to the Materials Science Division and carry out their graduation research there (at the graduate level, the Materials Science Division of the Department of Human and Environmental Studies, Graduate School of Human and Environmental Studies).
Key terms
- π-conjugated molecule
- An organic molecule in which electrons are delocalized across the whole molecule. It has excellent optical and electrical properties and is used in applications such as organic EL.
- Helicene
- A twisted molecule in which benzene rings are joined together like a spiral staircase.
- Buckybowl
- A bowl-shaped molecule that resembles half of a soccer-ball-shaped fullerene.
NewsLab news
View More ↗ResearchResearch themes
The lab creates new three-dimensional π-conjugated molecules and, by making use of their three-dimensional shapes, produces properties and functions that planar molecules do not have.
*Illustrative imageHelicenes, helical molecules
The lab developed a method to rapidly synthesize, in a few steps, helicenes that combine strong luminescence and circularly polarized luminescence. It has also succeeded in synthesizing figure-eight-shaped molecules and strongly twisted porphyrins.
*Illustrative imageBowl-shaped molecules containing nitrogen
The lab was the first to synthesize "azabuckybowl," a buckybowl with nitrogen inside its framework. Making use of its strong attraction to fullerenes, the lab is creating functions such as the formation of supramolecular polymers and two-photon absorption.
*Illustrative imageMolecules that change shape when pushed
Molecules with strained frameworks change shape in response to small stimuli. The lab has created molecular materials that change shape under electricity or force and emit light or electricity, as well as polar crystals made of helicenes with a spring-like structure.
MembersFaculty
The Hiroto Lab consists of faculty members, postdoctoral researchers, and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorSatoru Hiroto
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: “Stereoselective Syntheses, Structures, and Properties of Extremely Distorted Chiral Nanographenes Embedding Hextuple Helicenes (MédiHAL 2990017)” Jean-Valère Naubron / Laurence Charles / Yannick Carissan / Denis Hagebaum-Reignier / Yoann Coquerel / Centre Interdisciplinaire de Nanoscience de Marseille / National Center for Scientific Research / Institut des Sciences Moléculaires de Marseille / Institut de chimie / Aix-Marseille University / Public domain (cropped)
- Helicenes, helical molecules: “Polihelicenos” Mephisto spa / Public domain (cropped)
- Bowl-shaped molecules containing nitrogen: “2corannulene” Claireotteson / CC BY-SA 4.0 (cropped)
- Molecules that change shape when pushed: “Molecular Vibration Model – Atoms Connected by a Spring” Tby11 / CC0 (cropped)
- Related lab (Fujita Lab): “Iridium element” W. Oelen / CC BY-SA 3.0 (cropped)
- Related lab (Tsue Lab): “Carbon dioxide capture ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Related lab (Yoshida Lab (Hisao Yoshida)): “TiO2Photocatalysis” Ibhadon AO, Fitzpatrick P. / CC BY-SA 3.0 (cropped)
- Related lab (Biochemistry Lab (Tohru Tsuchiya)): “CyanobacteriaColl1” Christian Fischer / CC BY-SA 3.0 (cropped)
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