Advanced Strategy for High-Performance A-D-A′-D-A Type Non-Fused Ring Electron Acceptors with Nitrogen Heterocyclic Cores DOI
Yang Jiang, Chuang Yao,

Yezi Yang

et al.

The Journal of Physical Chemistry B, Journal Year: 2025, Volume and Issue: 129(11), P. 3109 - 3119

Published: March 6, 2025

The development of nonfused ring electron acceptors (NFREAs) has garnered significant attention due to their simplified molecular design and cost-effectiveness. Recent advancements have pushed the power conversion efficiency (PCE) NFREAs beyond 19%. Despite these advantages, most adopt A-D-A structures, where electron-donating core is typically a benzene substituted with fluorine or alkoxy groups. This restricts tunability energy levels, selection substituents for rings as central units relatively constrained, which hampers further optimization material properties. In this work, we designed three A-D-A′-D-A structured fully featuring distinct nitrogen heterocyclic cores: linear-shaped TT, star-shaped TYT, quad-rotor-shaped TTVP. nitrogen-containing aromatic units, strong electron-withdrawing groups, enable precise tuning levels. Moreover, cores enhance rigidity, facilitating efficient π–π stacking improving mobility. Although share identical π-bridges terminal unique exert divergent effects on photovoltaic performance. Theoretical calculations reveal that TT TTVP exhibit higher affinity, greater absorption intensity, lower exciton binding energy, mobility compared high-performance reference NFREA, TBT-26. Notably, TTVP, an four exhibits exceptional electronic It achieves highest narrowest bandgap 1.76 eV, predicted 4.43 × 10–4 cm2 V–1 s–1, surpassing These findings underscore potential in diversifying NFREA advancing next-generation NFREAs.

Language: Английский

Tailoring Chain‐Length in Through‐Space Charge‐Transfer Donor‐σ‐Acceptor Multifunctional Emitters for Efficient Long‐Term Bioimaging DOI Open Access
Tapashi Sarmah, Soumik Pal, Debasish Barman

et al.

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract This work presents a simple strategy to develop new series of through‐space charge‐transfer (TSCT) donor–acceptor luminogens with varying alkyl chain lengths as spacer groups (D‐σ‐A), CznDPy [5‐(4‐(9H‐carbazol‐9‐yl) alkyl)‐5H‐pyrazino[2,3‐b] indole‐2,3‐dicarbonitrile] ( n = 2, 3, 4, and 5) displaying rare multifunctional optical behaviors aggregation‐induced emission (AIE), thermally activated delayed fluorescence (TADF), (AIDF), mechanoluminescence (ML), mechanochromism (MCL) properties. Fine‐tuning the flexible between donor acceptor results in variable intermolecular interactions charge transfer (CT) behavior, thereby modulating their respective properties aggregated/solid states. The integrated emitters exhibit maximum total quantum yield 85% prolonged lifetime 344 µs. Considering challenges existing for developing AIDF molecules longer lifetimes, enhanced efficiency, tunable characteristics, utility is emphasized efficient long‐term bioimaging human breast cancer cells up 7 days. These constitute first examples organic TSCT small such long colors, higher efficiency used diagnostic imaging cells. study also sheds light on structure‐property relationships offers valuable insights into class tailored materials various applications.

Language: Английский

Citations

0
A Novel Electron-Rich Pillar [6] Arene Derivative Based Electrochemical Sensor for High Sensitivity and Specificity for Diquat Detection DOI

Zan Tan,

Pengyu Hou,

J YANG

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Advanced Strategy for High-Performance A-D-A′-D-A Type Non-Fused Ring Electron Acceptors with Nitrogen Heterocyclic Cores DOI
Yang Jiang, Chuang Yao,

Yezi Yang

et al.

The Journal of Physical Chemistry B, Journal Year: 2025, Volume and Issue: 129(11), P. 3109 - 3119

Published: March 6, 2025

The development of nonfused ring electron acceptors (NFREAs) has garnered significant attention due to their simplified molecular design and cost-effectiveness. Recent advancements have pushed the power conversion efficiency (PCE) NFREAs beyond 19%. Despite these advantages, most adopt A-D-A structures, where electron-donating core is typically a benzene substituted with fluorine or alkoxy groups. This restricts tunability energy levels, selection substituents for rings as central units relatively constrained, which hampers further optimization material properties. In this work, we designed three A-D-A′-D-A structured fully featuring distinct nitrogen heterocyclic cores: linear-shaped TT, star-shaped TYT, quad-rotor-shaped TTVP. nitrogen-containing aromatic units, strong electron-withdrawing groups, enable precise tuning levels. Moreover, cores enhance rigidity, facilitating efficient π–π stacking improving mobility. Although share identical π-bridges terminal unique exert divergent effects on photovoltaic performance. Theoretical calculations reveal that TT TTVP exhibit higher affinity, greater absorption intensity, lower exciton binding energy, mobility compared high-performance reference NFREA, TBT-26. Notably, TTVP, an four exhibits exceptional electronic It achieves highest narrowest bandgap 1.76 eV, predicted 4.43 × 10–4 cm2 V–1 s–1, surpassing These findings underscore potential in diversifying NFREA advancing next-generation NFREAs.

Language: Английский

Citations

0