Dual-State Photophysical Modulation via Bifurcated Hydrogen Bonding in a U-Shaped Dipyridophenazine-Cored Donor-π-Acceptor-π-Donor Fluorophore

Takei, Kimiya; Kobashi, Shunsuke; Divya et al.

Chemistry - A European Journal, 2025

アクセス数:122件（2026-04-05 01:49 集計）

固定URL: https://hdl.handle.net/11094/103714

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タイトル
Dual-State Photophysical Modulation via Bifurcated Hydrogen Bonding in a U-Shaped Dipyridophenazine-Cored Donor-π-Acceptor-π-Donor Fluorophore
著者
著者名
Takei, Kimiya
著者名
Kobashi, Shunsuke
著者名
Divya
NRID
1000030346184 1000030346184
ORCID
0000-0001-7051-7599 0000-0001-7051-7599
researchmap permalink
read0089607 read0089607
Scopus Author ID
6701482198 6701482198
著者名
Tohnai, Norimitsu
NRID
1000090273599 1000090273599
ORCID
0000-0001-9619-445X 0000-0001-9619-445X
researchmap permalink
read0185263 read0185263
Scopus Author ID
7003640913 7003640913
著者名
Minakata, Satoshi
NRID
1000010722796 1000010722796
著者名
Kobayashi, Yoichi
著者名
de Silva, Piotr
NRID
1000060608785 1000060608785
ORCID
0000-0001-9103-4238 0000-0001-9103-4238
researchmap permalink
read0156438 read0156438
Scopus Author ID
12753487600 12753487600
著者名
Takeda, Youhei
キーワード等
charge-transfer
donor-acceptor
hydrogen bonding
luminescence
supramolecular complex
内容
Takei K., Kobashi S., Divya, et al. Dual-State Photophysical Modulation via Bifurcated Hydrogen Bonding in a U-Shaped Dipyridophenazine-Cored Donor-π-Acceptor-π-Donor Fluorophore. Chemistry - A European Journal, e03421 (2025); https://doi.org/10.1002/chem.202503421.
抄録
Modulating photophysical properties via hydrogen bonding offers a powerful strategy for designing supramolecular functional materials and responsive optical systems. Here, we present a U-shaped dipyridophenazine (DPyPHZ)-cored donor–π–acceptor–π–donor (D–π–A–π–D) scaffold that serves as a hydrogen-bond receptor capable of forming bifurcated hydrogen bonds, enabling simultaneous modulation of both ground and excited states. We developed an efficient synthetic route to this π-conjugated system, and demonstrated that its absorption and emission spectra undergo pronounced red-shifts upon 1:1 complexation with neutral hydrogen-bond donors such as sulfonamides and even water. Spectroscopic analyses reveal that the hydrogen-bonding interaction stabilizes the charge-transfer excited state, leading to enhanced photoluminescence quantum yield (PLQY) and color modulation. Notably, these optical responses persist in the solid state when embedded in a polymer matrix, enabling emission color switching without fluorophore aggregation. Single-crystal X-ray analysis confirmed the formation of a well-defined bifurcated hydrogen-bonding complex in the solid state. Comparative studies with structural analogues highlight the importance of the electron-density hotspot in DPyPHZ for selective and directional hydrogen bonding. This work introduces a supramolecular design strategy for precise dual-state photophysical control, providing a platform for environmentally responsive luminescent materials with potential in sensing, imaging, and optoelectronic applications.
出版者
John Wiley and Sons Inc
収録物名
Chemistry - A European Journal
刊行年月
2025-12-26
言語
英語
ハンドルURL
https://hdl.handle.net/11094/103714
PISSN
09476539
eISSN
15213765
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1002/chem.202503421
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article