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Solid State Chemistry Lab
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A lab that creates crystals of functional molecules and uncovers how they work.
AboutAbout the lab
High-performance materials from soft crystals
The Solid State Chemistry Lab studies the structure and function of crystals formed by arrangements of molecules.
Based on detailed crystal structure information, the lab analyzes molecular motion, phase transitions, and interactions between molecules.
From this, it aims to uncover how crystals exhibit their functions and to control them freely.
The plastic/ferroelectric crystals developed by the lab are soft, and can be made into transparent films simply by pressing the powder.
Key terms
- Ferroelectric
- A material that inherently has an electrical bias (polarization) and whose direction can be reversed by applying an electric field.
- Phase transition
- A phenomenon in which the state of a substance or the arrangement of molecules in a crystal changes to a different form with changes in temperature or pressure.
- Plastic crystal
- A soft crystalline state in which molecules remain in an ordered arrangement but can rotate freely.
ResearchResearch themes
The lab studies the relationship between structure and function in molecular crystals. From crystal structure information, it analyzes molecular motion, phase transitions, and interactions between molecules, and creates molecular crystals with new functions.
*Illustrative imageDevelopment of plastic/ferroelectric crystals
A ferroelectric is a material that has spontaneous electric polarization and whose polarization direction can be reversed by applying an electric field. The plastic/ferroelectric crystals developed by the lab are ferroelectric at room temperature, and at high temperature they undergo a phase transition to a plastic crystal phase in which the molecules rotate isotropically. In the soft phase the symmetry is high and the polarization direction can be changed almost freely in three dimensions, so even disks made by compacting powder and crystal films work as ferroelectrics.
*Illustrative imageCrystals that keep moving under continuous light
Light-driven materials studied by other groups require the light to be blinked or its color to be changed in order to keep them moving. The crystals of this lab need only continuous, constant light: reactions and phase transitions inside the crystal occur alternately, and the crystal oscillates repeatedly. Continuing to move through its own mechanism alone is called being "autonomous."
*Illustrative imageCreating function from molecular networks
In the body, various molecules stimulate one another and produce functions that a single molecule cannot. Aiming to build molecular networks that produce advanced, life-like functions, the lab creates them through organic synthesis and uncovers how they work through physical chemistry analysis.
MembersFaculty
- Associate ProfessorJun Harada
- Assistant ProfessorYoshiyuki Kageyama
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: “Ferroelectric liquid crystal image from a polarizing microscope” Ingo Dierking / CC BY-SA 4.0 (cropped)
- Development of plastic/ferroelectric crystals: “Functional ceramic” Giovanna Canu, CNR-ICMATE Giovanna 27 / CC BY 4.0 (cropped)
- Crystals that keep moving under continuous light: “A polarized light micrograph of physiological saline crystals” Janeklass / CC BY 4.0 (cropped)
- Creating function from molecular networks: “Belousov Zhabotinsky reaction ( )” Stephen Morris from Toronto, Canada / CC BY 2.0 (cropped)
- Related lab (Materials Chemistry Lab): “Gel balls” Renato Lombardero / CC BY 2.0 (cropped)
- Related lab (Physical Chemistry Lab): “Nanoscale Plasmonic Resonator Structures ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Structural Chemistry Lab): “Human Oxy-Hemoglobin Protein” PDB code 2DN1 1.25 a resolution crystal structures of human haemoglobin in the oxy, deoxy and carbonmonoxy forms. Park, S.-Y., Yokoyama, T., Shibayama, N., Shiro, Y., Tame, J.R. (2006) J Mol Biol 360: 690-701 DOI: 10.1016/j.jmb. Image created using JSmol (Javascript) / CC0 (cropped)
- Related lab (Theoretical Chemistry Lab): “Potential Energy Surface for Water” AimNature / CC BY-SA 3.0 (cropped)
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