ペイアウトとは

Support Kyushu U 日本語 ENGLISH Prospective students Current students Companies & researchers Alumni Crisis Management News Events About Office of the President University Overview Kyushu U Connect Fast Facts Public Relations Featured Academics Schools & Centers The Global University Project Alumni Resources Donation Activities and Initiatives Future Plans University Facilities Academics Faculty of Arts and Science Schools Distinctive Education Programs Double Degree Programs Student Exchange Programs Short-term Study Programs The 3 Policies: Diploma, Curriculum, and Admissions Course Registration Academic Calendar Admissions Undergraduate Admissions Graduate Admissions Tuition, Fees & Scholarships Information for International Students Campus Life Facilities and Healthcare Extracurricular / Student-Led Activities Careers & Employment Procedures Contact Information for Consultations Research Research at Kyushu University Academic Staff Educational and Research Activities Database Research Activity Support Industry-University -Government Collaboration Support Research Centers and Projects Framework to Support Collaborated Research Research Integrity 日本語 ENGLISH News Topics Features Research Close-Up Notices Important Research Results Humanities & Social Sciences Art & Design Life & Health Math & Data Physics & Chemistry Materials Technology Environment & Sustainability Events Event Calendar Categories Public Seminar Lecture, etc. Exhibition Other Place Ito Campus Hakozaki Satellite Hospital Campus Chikushi Campus Ohashi Campus Beppu Campus Off Campus About Office of the President Message from the President Kyushu University VISION 2030 Biography Honorary Doctorates History of the Presidency Kyushu U Connect University Overview Organization Charter Presidential Selection Regulations and Policies History Future Plans Mid-Term Objectives and Plans Public Relations Publications Press Releases Promotional Videos University logomark List of Social Media Accounts Virtual Backgrounds Virtual Backgrounds (Archive) Featured Academics Campus Relocation Ceremony to Commemorate Completion of Ito Campus University Facilities Alumni Resources Alumni Associations Donation Donations to Schools, Graduate Schools, and Researchers, etc. Activities and Initiatives Promoting Diversity, Equity, and Inclusion QS-APPLE 2019 Response to the 2016 Kumamoto Earthquake Schools & Centers Research Institutes Centers for Common Education and Research Organizations and Offices Hospitals Libraries Museums Others Academics Faculty of Arts and Science Schools Educational and Research Course The 3 Policies Academic Calendar Course Registration Curriculum Registration / Syllabuses Distinctive Education Programs Program for Leading Graduate Schools Admissions Undergraduate Admissions Enrolling in Undergraduate School Applicants with Disabilities Graduate Admissions Applicants with Disabilities Enrolling as a Research Student Tuition, Fees, & Scholarships Tuition and Fees Enrollment Fee Exemption/Deferment and Tuition Fee Exemption for Newly-enrolled Students Scholarships Payment of tuition Tuition Fee Exemption, Enrollment Fee Exemption/Deferment Financial Aid Double Degree Programs Student Exchange Programs Campus Life Facilities and Healthcare Student Facilities Dormitories Healthcare Personal Accident Insurance for Students/ Liability Insurance Careers & Employment New Information How to use Job and Career Support System Career Consulting Job Hunting Support for International Students Recruitment of International Students Extracurricular / Student-Led Activities Procedures Certificates National Pension System for Students Contact Information for Consultations One-Stop Consultation Service Research Research at Kyushu University Humanities and Social Sciences Art and Design Life and Health Math and Data Physics and Chemistry Materials Technology Environment and Sustainability Research Close-Up Research Centers and Projects Next-Generation Fuel Cell Research Center (NEXT-FC) Research Activity Support On-campus Consultation Research Strategy Promotion Support for Research Funding and Grants Support for Other Research Activities Industry - University - Government Collaboration Support Technological Consultation Intellectual Property Management and Use Joint Research/Sponsored Research Comprehensive Collaboration Joint Research Department Research Integrity Framework to Support Collaborative Research International ･Prospective students ･Current students ･Companies & researchers ･Alumni ･Support Kyushu U Crisis Management ･Contact Us ･Visit ･Career ･Disclaimer & Copyright ･Privacy Policy ･Sitemap 研究成果 Research Results TOP News Research Results Toward tunable molecular switches from organic compounds Toward tunable molecular switches from organic compounds Newly synthesized organic molecules can be tuned to emit different colors depending on their molecular structures in crystal form 2023.04.18 Research ResultsMath & DataPhysics & ChemistryMaterials Fig. 1. Crystals of the newly synthesized compounds, anthraquinodimethane derivatives, which have different colors depending on their molecular structure (Yusuke Ishigaki) Joint press release by Hokkaido University and Kyushu University. Molecular switches are chemicals with molecular structures that can be shifted between two or more stable configurations in response to changes in their environment. They are of great interest in the development of molecular computers, molecular machines, and drug delivery systems. Compounds with conformational isomers—identical molecular formulas but different molecular structures—can make very effective molecular switches. Researchers at Hokkaido University and Kyushu University have developed a technique to synthesize potential molecular switches from anthraquinodimethanes (AQDs), a group of overcrowded organic molecules. The study, led by Associate Professor Yusuke Ishigaki at Hokkaido University and Associate Professor Toshikazu Ono at Kyushu University, was published in the journal Materials Chemistry Frontiers.  "AQDs are a type of overcrowded ethylene, molecules with carbon-carbon double bonds surrounded by large chemical groups," explains Ono. "They have two common isomers, the folded and twisted forms. They are especially interesting as molecular switches, as their sterically hindered double bond can provide isomers absorbing and emitting different wavelengths of light."  AQDs generally adopt the most stable folded or twisted form, making it difficult to isolate pure samples of any other isomer to study its properties. The researchers surmounted this obstacle by designing flexible AQD derivatives that can more easily and stably form different isomers.  The synthesized derivatives were not only able to stably form twisted and folded isomers, but also other isomeric forms, when recrystallized in different solvents. The researchers performed detailed analysis of the derivatives to fully understand their properties.  In a crystalline state, each of these isomers absorbs and emits distinct frequencies of light, which is due to the differences in the distribution of electrons in the isomer molecules. Interestingly, the light absorption and emission changed when the crystals were ground into amorphous solid, and following treatment with appropriate solvents can produce original or other crystals with a variety of colors.  "This work is the first report on the isolation of multiple isomeric forms of AQD," Ishigaki concluded. "Their absorption and emission of different light frequencies, and more importantly, the ability to modulate the absorption and emission by external stimuli, make these compounds excellent candidates for the development of molecular switches." Original release from Hokkaido University  ### For more information about this research, see "Exceptionally flexible quinodimethanes with multiple conformations: polymorph-dependent colour tone and emission of crystals," Kazuma Sugawara, Toshikazu Ono, Yoshio Yano, Takanori Suzuki, and Yusuke Ishigaki, Materials Chemistry Frontiers, https://doi.org/10.1039/D2QM01199A About Kyushu University Kyushu University is one of Japan's leading research-oriented institutes of higher education since its founding in 1911. Home to around 19,000 students and 8,000 faculty and staff, Kyushu U's world-class research centers cover a wide range of study areas and research fields, from the humanities and arts to engineering and medical sciences. Its multiple campuses—including one of the largest in Japan—are located around Fukuoka City, a coastal metropolis on the southwestern Japanese island of Kyushu that is frequently ranked among the world's most livable cities and historically known as Japan's gateway to Asia. Through its Vision 2030, Kyushu U will 'Drive Social Change with Integrative Knowledge.' Its synergistic application of knowledge will encompass all of academia and solve issues in society while innovating new systems for a better future. Fig. 2. The folded and twisted isomers absorb different wavelengths of light (Kazuma Sugawara, et al. Materials Chemistry Frontiers. February 8, 2023). Fig. 3. The methyl derivative of the new compound has four different isomers, with different crystal structures each (Kazuma Sugawara, et al. Materials Chemistry Frontiers. February 8, 2023). Fig. 4. When ground into amorphous solid and treated with appropriate solvents the light absorption and emission changes (Kazuma Sugawara, et al. Materials Chemistry Frontiers. February 8, 2023). Fig. 5. Takanori Suzuki (left) Kazuma Sugawara (center) and Yusuke Ishigaki (right), authors from Hokkaido University (Photo: Yusuke Ishigaki). Fig. 6. Yoshio Yano (left) and Toshikazu Ono (right), authors from Kyushu University (Photo: Toshikazu Ono).   Research-related inquiries Associate Professor Toshikazu OnoDepartment of Applied Chemistry/Faculty of Engineering/Kyushu University Contact information can also be found in the full release.   Kyushu U Connect Tweet Back to the list TOP News Research Results Toward tunable molecular switches from organic compounds Research Results Humanities & Social Sciences Art & Design Life & Health Math & Data Physics & Chemistry Materials Technology Environment & Sustainability Year 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 九州大学Kyushu University744 Motooka Nishi-ku Fukuoka 819-0395 Contact Us | Visit Career Academics Disclaimer & Copyright Admissions News Privacy Policy Research Events Sitemap Campus Life About COPYRIGHT © KYUSHU UNIVERSITY. ALL RIGHTS RESERVED.