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Toshikazu Ono Last modified date：2024.04.23

Associate Professor / Ｃｈｅｍｉｓｔｒｙ　ａｎｄ　Ｂｉｏｃｈｅｍｉｓｔｒｙ　Ｃｏｕｒｓｅ
Department of Applied Chemistry
Faculty of Engineering


Graduate School
Department of Chemistry and Biochemistry
Graduate School of Engineering
Undergraduate School
Department of Materials Science and Engineering
School of Engineering


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Homepage
https://kyushu-u.elsevierpure.com/en/persons/toshikazu-ono
　Reseacher Profiling Tool　Kyushu University Pure
https://sites.google.com/view/toshikazu-ono-hp
http://www.chem.kyushu-u.ac.jp/~hisaeda/
久枝研究室 .
Phone
092-802-2830
Fax
092-802-2830
Academic Degree
Ph.D
Country of degree conferring institution (Overseas)
No
Field of Specialization
Polymer Chemistry, Supramolecular Chemistry, Coordination Chemistry, Photochemistry，　Ｃｒｙｓｔａｌ　Ｅｎｇｉｎｅｅｒｉｎｇ
ORCID(Open Researcher and Contributor ID)
https://orcid.org/0000-0001-5427-8540
Total Priod of education and research career in the foreign country
01years09months
Research
Research Interests
  • Preparation of circularly polarized emissive materials using hinge molecules
    keyword : circularly polarized luminescence
    2021.04.
  • Development of helical metal complexes for circular polarized luminescent materials
    keyword : circular polarized luminescence, helical metal complexes
    2016.04.
  • Development of salt-cocrystal continuum for photofunction materials
    keyword : salt-cocrystal continuum
    2017.04.
  • Preparation of organic solid-state emissive materials based on multicomponent reactions
    keyword : Multicomponent reactions
    2017.04.
  • Construction of Innovative Light Conversion Materials by Porous Organic Crystals
    keyword : fluorescence, phosphorescence, emission lifetime, organic inclusion crystals
    2014.10.
  • Synthesis and characterization of novel porphycene derivatives
    keyword : porphycene, solid-state emission, solid-state catalyst
    2015.04.
  • Development of functional soft matters based on dameged bases
    keyword : chemical biology, DNA repair, hydro gel
    2013.04～2016.03.
  • Development of novel radical transfer catalysis based on hydrophobic Vitamin B12.
    keyword : organometallic chemistry, catalytic chemistry, photochemistry
    2013.04～2020.09.
  • Supramolecular Composite Materials based on π-conjugated Molecules
    keyword : supramolecular chemistry, πconjugated molecules, lewis pair, inclusion crystals, solid state emissions
    2012.08.
  • Preparation of Protein-polymer Conjugates using apoprotein-Heme Supramolecular Interactions.
    keyword : polymer chemistry, supramolecular chemistry, bioinorganic chemistry, hemoprotein, bionanomaterial
    2010.04～2012.08.
  • Direct Fluorescence Monitoring of DNA Base Excision Repairs
    keyword : chemical biology, DNA repair, fluorescence probe
    2010.04～2011.12.
  • Preparation of Thickening Agents for Organic Solvents using Associative Polyelectrolyes
    keyword : polymer chemistry, supramolecular chemistry, thickener
    2008.04～2010.03.
  • Lipophilic Polyelectrolyte Gels as Super Absorbent Polymers for Organic Solvents
    keyword : polymer chemistry, supramolecular chemistry, supar absorbent polymers, polymer gels
    2005.04～2010.03.
Academic Activities
Reports
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Papers
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1. Luxia Cui, Ami Horioka, Ryoichi Ishimatsu, Masashi Mamada, Chihaya Adachi, Keishiro Tahara, Yu Hoshino, Toshikazu Ono, Advanced Molecular Design for Efficient Multicolor Electrochemiluminescence and Amplified Spontaneous Emission Based on Tetra‐BF2 Complexes, Advanced Optical Materials, 10.1002/adom.202302803, 2024.01, Abstract

Advanced organoboron dyes, incorporating tetra‐boron difluoride (tetra‐BF2) moieties, are developed, demonstrating efficient electrochemiluminescence (ECL) emissions in the green to orange regions through direct ion annihilation. By introducing diverse alkyl modifications in the molecules, luminescence color tuning is achieved via alterations in conjugation and bending angle. A photoluminescence quantum yield of 100% in dilute solutions is successfully achieved. Notably, the introduction of alkyl groups to the methine side stabilizes the radical ionic state, resulting in a high ECL efficiency of 74% through an efficient radical‐ion annihilation pathway. The key factor is that the energy of the annihilation reaction exceeds the S1 energy required for luminescence. Spin density calculations further elucidate the substituent effects on the radical ions of complexes. Moreover, the lasing properties of these materials in the solution‐processed blend films are investigated, revealing a low amplified spontaneous emission (ASE) threshold (Eth) of 6.40 ± 0.24 µJ cm−2, which is notably lower among organic laser materials. This is attributed to their large Stokes shifts and high quantum yield. The excellent ECL and ASE performances establish these materials as a valuable addition to the existing library of organoboron dyes, offering fresh insights into the development of organic solid‐state lasers..
2. Yoshio Yano, Hidetaka Kasai, Yanyan Zheng, Eiji Nishibori, Yoshio Hisaeda, Toshikazu Ono, Multicomponent Crystals with Competing Intermolecular Interactions: In Situ X-ray Diffraction and Luminescent Features Reveal Multimolecular Assembly of Mechanochemical Conditions., Angewandte Chemie (International ed. in English), 10.1002/anie.202203853, 2022.06, Supramolecular chemistry under mechanochemical conditions has drawn attention because it can induce low-solubility molecules to self-assemble, although most of the reported examples have been limited to two-component systems. We applied mechanochemical synthesis to achieve multimolecular self-assembly in more challenging three-component systems. The produced crystals showed multicolor solid-state luminescence depending on the components when exposed to UV light.  Optical outputs and X-ray diffraction studies were used to examine the self-assembling behavior in greater depth. Using synchrotron radiation, in situ X-ray diffraction permitted direct observation of the milling process, which started the self-assembly process within 1 min. This research emphasizes the importance of multicomponent molecules with optical functions and self-assembling behavior and offers the possibility of developing more complicated multicomponent crystals and organic solid solutions for advanced materials..
Presentations
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1. Toshikazu Ono, Design of Multicomponent Crystals for Novel Photofunction Design, 日本化学会第100春季年会, 2020.03, Individual molecules have their own unique characteristics, but hidden properties can be revealed when they are hybridized with other molecules. Interest in the design,
preparation, characterization, and application of co-crystals or multicomponent crystals has grown in crystal engineering and materials science. Here we report a variety of multicomponent molecular crystals that can show remarkable photoluminescence properties..
2. Toshikazu Ono, Design of Multicomponent Molecular Crystals for Light-emitting Materials and Optical Sensors, 日本化学会第100春季年会, 2020.03, In this presentation, we would like to introduce our recent research on light-emitting materials and optical sensors using multicomponent molecular crystals. The methodology involved designing an appropriate π-conjugated dye molecule (electron-accepting or electron-donating compounds) and various co-formers, and comprehensively prepare inclusion crystals, co-crystals, solvates, and organic salts. The design strategy to prepare crystals includes molecular shape and cooperative intra- and inter-molecular interactions such as hydrogen bonds and charge–transfer interactions..
3. Ai Taema, Toshikazu ONo, 小出 太郎, 嶌越 恒, Yoshio Hisaeda, Preparation of Organic Inclusion Crystals with Tunable Properties of Fluorescence and Phosphorescence Emission , 9th Asian Photochemistry Conference (APC2016), 2016.12.
4. Toshikazu Ono, Yoshio Hisaeda, Color-tunable Solid-state Emission of Multicomponent Crystals by Cooperative Electron Donor-Acceptor Complexation, Pacifichem 2015, 2016.12.
Membership in Academic Society
  • The Society of Physical Organic Chemistry, Japan
  • The Society of Synthetic Organic Chemistry, Japan
  • Japanese Photochemistry Association
  • Japan Society of Coordination Chemistry
  • The Society of Polymer Science, Japan
  • The Chemical Society of Japan


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