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Molecular Environment Analytical Chemistry Lab
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The lab freely controls functional interfaces through the way molecules are arranged.
AboutAbout the lab
The science of freely controlling functional interfaces.
The Molecular Environment Analytical Chemistry Lab (Hasegawa Lab) seeks to understand the functions of compounds by examining molecular packing, arrangement, orientation, and interactions at the level of individual functional groups.
Rather than taking textbook pictures at face value, the lab studies in detail the chemical makeup of the devices we have in hand today. Its three pillars are organofluorine science, multiple-angle incidence resolution spectrometry (MAIRS), and organic semiconductors.
Key terms
- Perfluoroalkyl group
- The part of an alkyl group in which all hydrogen atoms are replaced with fluorine. It is known for repelling water and oil.
- Dipole
- An electrical imbalance within a molecule, caused by a slight offset between positive and negative charges.
- MAIRS
- An infrared spectroscopy technique developed in this lab that measures the orientation of molecules in a thin film for each functional group.
- PTFE
- A fluoropolymer known as Teflon.
NewsLab news
A paper extending the logP method to a three-phase system that includes a fluorous phase was published in J. Phys. Chem. A
A student received the Young Researcher Presentation Award at the FY2026 Annual Meeting of the Spectroscopical Society of Japan
The lab's first paper using AFM-IR was accepted by Appl. Spectrosc.
ResearchResearch themes
The lab clarifies the chemical nature of functional interfaces and materials by examining molecular packing, arrangement, orientation, and interactions at the level of functional groups.
*Illustrative imageUnderstanding the properties of fluorides through dipoles
Starting from the twisted structure of perfluoroalkyl groups and the large dipole of the C–F bond, the lab considered a model in which neighboring chains aggregate two-dimensionally, and used it to gain a unified understanding of properties unique to fluorides, such as water repellency.
*Illustrative imageMaterial recycling of fluoropolymers
Focusing on the fact that the intermolecular force in PTFE is dipole–dipole interaction, the lab succeeded in mechanically loosening PTFE by adding sodium chloride, a world first (joint research).
*Illustrative imageExtended logP method
The logP method expresses hydrophobicity using two phases, water and octanol. The lab added a fluorous phase as a third phase and proposed a way to express the miscibility of compounds in a three-phase diagram. It has also built a website where anyone can try the calculation.
*Illustrative imageStructural analysis of thin films by MAIRS
Using multiple-angle incidence resolution spectrometry (MAIRS), which originated in the lab, the lab quantitatively evaluates molecular orientation in thin films at the level of functional groups.
MembersFaculty
- ProfessorTakeshi Hasegawa
- Associate ProfessorKenichi Ataka
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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: “PTFE-3D-vdW” 作者不詳 / Public domain (cropped)
- Understanding the properties of fluorides through dipoles: “Polytrifluoroethylene” Chem538w10grp5 / Public domain (cropped)
- Material recycling of fluoropolymers: “PTFE tape” Headlock0225 / CC BY-SA 4.0 (cropped)
- Extended logP method: “Mischungslücke Octanol-Wasser” WilfriedC / CC BY-SA 2.0 de (cropped)
- Structural analysis of thin films by MAIRS: “Spinner” Alison Chaiken / CC BY-SA 3.0 (cropped)
- Related lab (Aquatic Environmental Analytical Chemistry Lab): “Sampling fluids from the Deep (OOI 45)” Ocean Observatories Initiative / Public domain (cropped)
- Related lab (Molecular Microbial Science Lab): “Thermophilic bacteria” Amateria1121 / CC BY-SA 3.0 (cropped)
- Related lab (Integrated Nano-Analytical Chemistry Lab): “Transmission electron microscope (3)” Gannu03 / CC BY-SA 4.0 (cropped)
- Related lab (Atomic and Molecular Structure Lab): “XBio illustration – X-ray Crystallography” explorebiology / CC BY 4.0 (cropped)
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