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Environmental Chemistry Lab [Environmental Safety Research Center]
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A lab that explores molecular functions and reactions with a focus on chirality in the excited state.
AboutAbout the lab
Opening up new molecular functions through light and chirality.
Building on organic chemistry and photochemistry, the Mori Lab works to develop new molecular functions and reactions.
Focusing on chirality in the excited state, the lab works on controlling asymmetric photoreactions and clarifying optical properties such as circularly polarized luminescence.
As a lab of the Environmental Safety Research Center, it also studies the identification of isomers by mass spectrometry using GC-MS, as well as open-shell diradicaloids and computational chemistry evaluation of aromaticity.
The lab is a cooperating laboratory of the Department of Applied Chemistry, Graduate School of Engineering, The University of Osaka, and accepts fourth-year undergraduate students from the Applied Chemistry Course of the Department of Applied Science.
Key terms
- Excited state
- A state in which a molecule has absorbed energy, such as light, and is at a higher energy than usual.
- Chirality
- The property of a molecule whose shape cannot be superimposed on its mirror image. It is often compared to the relationship between the right and left hands.
- Circularly polarized luminescence
- Luminescence in which the emitted light is polarized in a right-handed or left-handed rotation.
- Open-shell diradicaloid
- A type of molecule with unpaired electrons (an open-shell species). Open-shell species are generally unstable and difficult to handle.
NewsLab news
Paper by an undergraduate student published in Chem. Commun.
Paper by a graduate of the lab accepted in Angew. Chem. Int. Ed.
Paper by a doctoral student published in Anal. Chem.
Master's student wins a poster presentation award
Mori Lab launched at the Environmental Safety Research Center
ResearchResearch themes
Building on organic chemistry and photochemistry, the Mori Lab aims to develop new molecular functions and reactions. Its research page introduces chirality in the excited state, isomer identification by mass spectrometry, open-shell diradicaloids, and computational chemistry evaluation of aromaticity.
*Illustrative imageChirality in the excited state
The lab investigates chirality in the excited state, which plays an extremely important role in photoreactions and photophysics. This includes controlling asymmetric photoreactions, also by using supramolecular interactions, and clarifying circular dichroism and circularly polarized luminescence from the relationship between structure and properties.
*Illustrative imageMass spectrometry for distinguishing isomers
The lab analyzes isomers whose mass spectra are very similar and hard to tell apart, using chemical ionization mass spectrometry with silicon compounds as the reagent gas. Based on reactions specific to silicon cations and on tandem mass spectrometry, it studies how to identify isomers of drugs.
*Illustrative imageCreation of open-shell diradicaloids
Open-shell species with unpaired electrons are generally unstable and difficult to synthesize and handle. Aiming to create functional diradicaloids that combine solubility with chemical stability, the lab is showing that the localization or delocalization of spin determines their electronic properties.
*Illustrative imageImproving methods for evaluating aromaticity
Aromaticity is a fundamental concept that indicates the stability and reactivity of cyclic molecules. The lab aims to overcome the weaknesses of the widely used NICS (nucleus-independent chemical shift) and to develop a computational chemistry method that gives consistent, highly reproducible evaluation for diverse molecules, including planar, nonplanar, and fused-ring ones.
MembersFaculty
The Mori Lab's members consist of faculty and doctoral, master's, and undergraduate students.As of 2026
- ProfessorTadashi Mori
- Associate ProfessorShinji Tsunoi
- Assistant ProfessorZhe Wang
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: “Bruker HCTultra mass spectrometer June2007” Mwillett4000 / Public domain (cropped)
- Chirality in the excited state: “Circular dichroism” No machine-readable author provided. Fffred~commonswiki assumed (based on copyright claims). / Public domain (cropped)
- Mass spectrometry for distinguishing isomers: “Mass Spectrometry Machine (NIH BioArt 286)” Courtesy of NIAID Ryan Kissinger / Public domain (cropped)
- Creation of open-shell diradicaloids: “Hydroperoxyl radical ball” Jynto (more from this user) / CC0 (cropped)
- Improving methods for evaluating aromaticity: “Aromatic Fluorocarbon” TBChem at English Wikipedia / Public domain (cropped)
- Related lab (Solid Catalyst Chemistry Lab): “Vintage laboratory glassware, Chemical Faculty, Gdansk University of Technology Poland” LukaszKatlewa / CC BY-SA 4.0 (cropped)
- Related lab (Molecular Catalytic Chemistry Lab): “Vintage laboratory glassware, Chemical Faculty, Gdansk University of Technology, Poland” LukaszKatlewa / CC BY-SA 4.0 (cropped)
- Related lab (Soft Nano Materials Lab [Institute of Scientific and Industrial Research]): “Dinaphthylene-dioxide-3D-balls” Jynto and Ben Mills / Public domain (cropped)
- Related lab (Polymer Biotechnology Lab): “TOF mass spectrometer June2007” Mwillett4000 / Public domain (cropped)
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