NEWS

2025-01-31

New faces

The first contact with new members from this April.

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2025-01-15

A student poster award

Takumi Okada gat a poster presentation award at CSJ Chemistry Festa.
Congratulations!

 

 

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2024-10-28

Prof. Dr. Pance Naumov vistited us to have discussion and delever a lecture

Prof. Dr. Pance Naumov (New York University Abu Dhabi) visited our laboratory.

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RESEARCH

Our group develops stimuli-responsive molecular-based materials, such as crystals, liquid crystals, organogels and etc. We try to elucidate so far unknown responses of such materials and provide novel functionality of molecules.

Molecular-based materials exhibiting stimuli-responsivity

Molecular crystals or liquid crystals often show properties and functionality different from its individual molecule itself. This is caused by the neighboring molecules within the assembled materials which are connected through various intermolecular interactions. This indicates that the molecular-based materials can show properties/functionalities based on assembled states. Upon applying external stimulations to such materials, such as temperature change, photoirradiation and mechanical stimulations, the assembled states/molecular arrangements can change. As a result, these molecular-based materials exhibit various responses, i.e., property changes and mechanical movement.

Bridging the gap between macroscopic externals stimulation and microscopic molecular arrangement

We have reported that the molecular-based materials exhibiting emission color changes, electronic conductivity changes, and mechanical movements upon applying mechanical stimulation. These stimuli-responses are caused by the “macroscopic” mechanical force by means of a spatula or a pestle/mortar, which leading to changes in “macroscopic” molecular arrangements and patterns of intermolecular interactions. Our group tries to elucidate precise molecular arrangements within the crystals/liquid crystals to identify the effect of external stimulation, bridging the gap between macro- and microscopic information.

Publications

2025

87. A Platinum Complex Capable of Forming a Crystal Containing Two Distinct Molecular Arrangements,
T. Seki, A. Yano,
Eur. J. Inorg. Chem., 2025, , e202400793
DOI: 10.1002/ejic.202400793.

2024

86. Luminescent Mechanochromism of a Platinum Complex with Four Monodentate Ligands Governed by Intramolecular Interactions Between Ligands,
T. Seki, R. Ishikawa,
Chem. Eur. J., 2024, , e202404241
DOI: 10.1002/chem.202404241.

85. Benzodifuranone Crystals with Solid-State Emission Arising from the Introduction of Bulky Substituents,
T. Seki, T. Okada,
Chem. Eur. J., 2024, 30, e202402622
DOI: 10.1002/chem.202402622.

84. Preparation of intrinsically fragile bent crystals,
T. Seki, S. Kobayashi, R. Ishikawa, K. Yano, T. Matsuo, S. Hayashi,
Chem. Sci., 2024, 15, 12258–12263
DOI: 10.1039/d4sc02918f.