Sotaro Kusumoto

Assistant Professor, Faculty of Chemistry and biochemistry, Kanagawa University *Profile is at the time of the award.

2025Inamori Research GrantsScience & Engineering

Research topics
Development of Highly Functional Adsorbent Material Capable of Capturing Various Useful Vapors
Keyword
Summary
Volatile coordinating solvents such as methanol and amines are industrially important, making the development of materials for their capture and reuse a crucial challenge. In this study, we develop a chemical adsorption material using tetracoordinate Ni complexes to achieve rapid and stable solvent vapor capture. These complexes utilize a "tetracoordinate ⇔ hexacoordinate" structural transformation as a driving force for adsorption and desorption. Furthermore, the accompanying color change enables their application as visual detection sensors. Conventional Ni complexes exhibit low responsiveness due to their high planarity and dense aggregation. In contrast, our study introduces bulky substituents to induce a non-planar structure, reducing aggregation density and exposing the Ni active sites. As a result, improved solvent vapor adsorption efficiency and reduced reaction time can be expected.

Comment

With the research grant we have received, we will work to develop high performance adsorption materials and improve their efficiency and functionality. In addition, we will actively share the results of this research and strive to contribute to both academic and industrial advancements. We sincerely appreciate this valuable opportunity and extend our deepest gratitude.

Outline of Research Achievements

In this study, we successfully developed a multifunctional adsorbent material based on a Ni complex incorporating an anthracene-functionalized bidentate ligand, which exhibits coordination-induced chromic and magnetic responses toward various coordinating solvents. The present results demonstrate enhanced solid-state responsiveness of the Ni complex and provide new insights into the molecular design of highly functional adsorbent materials.

A. Tanaka, et al. (2025) UV-induced formation of long-lived organic radicals in pyrazinium-based salts via bromide-to-cation electron transfer Crystal Growth & Design 25, 16, 7012–7018 https://pubs.acs.org/doi/10.1021/acs.cgd.5c00978

S. Kusumoto, et al. (2025) Anisotropic Supramolecular Interactions and Mechanical Flexibility in Ortho-Quinone Crystals Chemistry Letters 54, 9, upaf162 DOI: 10.1093/chemle/upaf162

image of Research Achievments


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