Youhei Takeda

Dual‐State Photophysical Modulation via Bifurcated Hydrogen Bonding in a U‐Shaped Dipyridophenazine‐Cored Donor‐π‐Acceptor‐π‐Donor Fluorophore A donor–π–acceptor–π–donor (D–π–A–π–D) fluorophore bearing a U-shaped dipyridophenazine core forms bifurcated hydrogen bonds with neutral donors such as sulfonamides or water. This interaction modula...

Final 2025 paper in Chem Eur J! Bifurcated H-bonding enables dual-state photophysics in a U-shaped DPPZ fluorophore. International collaboration🇯🇵🇩🇰 with Piotr_deSilva and Yoichi Kobayashi. Congratulations the team! #JST #ASPIRE #OpenAccess #PiSky
doi.org/10.1002/chem...

Highly soluble cyclic dibenzophenazine heterodimer enabled by a tetra-functionalized building block Abstract. A cyclic heterodimer of dibenzo[a,j]phenazine (DBPHZ) has been synthesized using a novel tetra-functionalized DBPHZ building block bearing bulky

Published! A soluble cyclic U-shaped dibenzophenazine dimer was developed and showed excimer-like emission in thin films. Proud to share our new joint work with
@mketherington.bsky.social in Chem. Lett. Congratulations to the team! doi.org/10.1093/chem...
#JST #ASPIRE #OpenAccess #PiSky

I visited Uni. of Toronto, Toronto Metropolitan Uni., York Uni., Uni. of Montreal, McGill Uni. & McMaster Uni.. Deep thanks to Profs Wilson, Koivisto, @tbaumlab.bsky.social, @hamzehsan.bsky.social, Perepichka & Adronov for amazing hospitality, and to everyone who joined in the event. 🇨🇦 #JST #ASPIRE

Aggregation‐Induced Energy Transfer Within a Donor–Acceptor–Donor Compound Featuring Hydrophobic Mesogenic Self‐Assembling Units Hydrophobic mesogenic self-assembling units induce the aggregation of a structurally distinct dibenzophenazine-cored electronic donor–acceptor–donor organic emitter in aqueous environments. This aggr...

Our latest paper is out in Chemistry – An Asian Journal! Water-based aggregation triggers energy transfer—like watching an aurora in your test tube 🌌 Huge thanks to Go Watanabe & Tsuneaki Sakurai! #JST #ASPIRE #OpenAccess #PiSky

doi.org/10.1002/asia...

🎤 Gave a seminar at the University of Alberta and had inspiring discussions with amazing researchers. Grateful to #ASPIRE for the support and to Eric for the warm hosting and great organization! 🇨🇦🙏

Synthesis and Photophysical Properties of Cyclic Homodimer of U-Shaped Dibenzophenazinylene A new class of cyclic π-extended heteroarylene oligomer─cyclic homodimer of U-shaped dibenzophenazinylene─has been successfully synthesized and characterized. NMR spectroscopy and DFT calculations imp...

🌀New release in Org. Lett.
–we’ve made the first cyclic U-shaped dibenzophenazine homodimer, unveiling unexpected photophysics and a new kinked heteroarylene topology. Congrats Naohiro! #PiSky
doi.org/10.1021/acs....

Synthesis of Solubility‐Enhanced 6,8‐Diarylated Dibromodibenzo[a,j]Phenazines via Pd‐Catalyzed C─H Arylation and Skeletal Rearrangement A new class of 6,8-diaryl-substituted DBPHZs has been synthesized via regioselective Pd-catalyzed C─H arylation and oxidative skeletal rearrangement. Strategically introduced bulky aryl groups bearin...

🚀Just dropped: Our new paper on solubility-enhanced dibromodibenzophenazines is now online Asian JOC! Curious about exciting new building blocks for exotic π-conjugated systems? Check it out doi.org/10.1002/ajoc... Huge congrats to Naohiro for the amazing work! 👏 #PiSky

I’m back in Vancouver to conduct collaborative research with Zac Hudson’s group at the University of British Columbia (UBC @chem.ubc.ca ) and to expand my network among Canadian researchers! If you’re visiting Vancouver during my stay, let me know—I’d be happy to catch up! #PiSky

We welcome Prof. Satoshi Arai from Kanazawa University! We learned a lot!
#JST #ASPIRE

Highlights of today’s workshop.
Great talks and poster presentations!
#JST #ASPIRE

We made it! Enjoying the #JST #ASPIRE kick-off meeting in #Osaka. Thanks @takephos.bsky.social for hosting. Looking forward to all of the talks and discussions this week from all of the members of our international team. #Science

We are ready for Kick-Off International Workshop #JST #ASPIRE!

We are looking forward to seeing you soon!

‘I worked on it little by little, with the help of a beer’: Making MOFs out of paper Chemistry World talks to Ryo Horikoshi about engaging students with chemistry concepts using his stunning paper models

Ryo Horikoshi's impressive paper models of supramolecular structures were achieved through many hours of effort, and a little help from a beer. As he says himself, 'Isn’t the structure of MOCs and MOFs very architectural complex and beautiful?'
#ChemSky #ScienceSky

Excited to share our new @chemrxiv.bsky.social preprint on dual-state photophysical modulation via bifurcated hydrogen bonding! Congrats to Kimiya! Collaboration with Prof. Yoichi Kobayashi and Piotr de Silva. doi.org/10.26434/che... #PiSky #ChemSky #luminescence #HydrogenBond #ChargeTransfer

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JREC-IN | 先端国際共同研究推進事業（ASPIRE）プロジェクト課題におけるコーディネーター公募（工学研究科　応用化学専攻） イノベーション創出を担う研究人材のためのキャリア支援ポータルサイト

関西エリアで国際共同研究プロジェクトの運営に情熱を注げるコーディネーターを募集しています！詳細は以下のリンクをご覧ください。ご興味のある方や、お知り合いで適任の方がいらっしゃいましたら、ぜひご応募・ご紹介ください！

jrecin.jst.go.jp/seek/SeekJor...

I and @GoWatanabe_KU have visited Zac Hudson group at @ubcchem.bsky.social for discussion on collaboration as part of #JST #ASPIRE program! This week was such a fruitful week for not only discussion but also expanding network!
I am coming back again to UBC soon!

Strategic Design of Anion‐Responsive Triarylboranes Exhibiting Colorimetric and Fluorometric Red‐Shift for Sensing and Optoelectronic Applications This Concept article presents a novel design strategy for anion-responsive triarylboranes that exhibit red-shifted colorimetric and fluorometric properties. With potential applications in organic lig...

Attention #ChemSky and #PiSky communities! I share my latest Concept article on the innovative design of red-shifting triarylborane (TAB)-based emitters. 🚀 This work introduces a fresh perspective to modulate the photophysical properties of TAB emitters. doi.org/10.1002/cphc...

JST Press Release#1737: JST to fund 32 research projects under the Adopting Sustainable Partnerships for Innovative Research Ecosystem (ASPIRE) Program The Japan Science and Technology Agency (JST, President HASHIMOTO Kazuhito) has approved funding for 32 new research projects through the

Our proposal on international collaboration research has been approved by JST ! We are looking forward to upcoming new international collaborations! #JST_ASPIRE

www.jst.go.jp/pr/info/info...

A van der Waals porous crystal featuring conformational flexibility and permanent porosity for ultrafast water release - Communications Chemistry Flexibility in porous crystals can enhance their adsorption and separation performances, however, achieving flexibility in porous crystals sustained solely through van der Waals interactions is challe...

A collaborative work with Prof. Yamagishi and Yamamoto (Univ. Tsukuba) has been published on Communications Chemistry! I have learned a lot from this collaboration work! "A van der Waals porous crystal featuring conformational flexibility and permanent porosity for ultrafast water" #ChemSky

My buddy, Przemek Data, visited Osaka University, and we enjoyed nice Japanese sake a lot!

Now I am on 🦋! I am looking forward to keeping connections in this side as well.