Pressure Regulated π–π Slip Enabling Blue‐Light Emission Enhancement of Terephthalic Acid DOI

Qing Yang,

Yixuan Wang,

Guangming Niu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Organic solid‐state luminescent materials give rise to widespread applications in the fields of detection sensors, flexible displays, and optoelectronic devices. However, it remains a significant challenge realize high‐efficiency emission organic systems owing undesired aggregation‐caused quenching. Herein, extraordinary enhancement terephthalic acid (TPA) is successfully achieved under high pressure. Significantly, unexpectedly captured down ambient conditions after pressure completely released, where photoluminescence quantum yield remarkably increased from 26.5% 74.1%. Experimental characterizations first‐principles calculations reveal that treatment engineering endows targeted TPA with enhanced hydrogen‐bond interactions decorated slipped π – staking arrangement. The configuration restricts vibration chemical bonds raises rotational energy barrier pressure‐treated TPA, resulting suppression nonradiative dissipation harvest high‐performance blue‐light emission. This study provides crucial insights into design pressure‐responsive solid significantly advances development materials.

Language: Английский

Pressure treatment enables white-light emission in Zn-IPA MOF via asymmetrical metal-ligand chelate coordination DOI Creative Commons

Qing Yang,

Weibin Wang,

Yunfeng Yang

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 15, 2025

Metal-organic frameworks that feature hybrid fluorescence and phosphorescence offer unique advantages in white-emitting communities based on their multiple emission centers high exciton utilization. However, it poses a substantial challenge to realize superior white-light single-component metal-organic without encapsulating varying chromophores or integrating phosphor subunits. Here, we achieve high-performance with photoluminescence quantum yield of 81.3% via boosting triplet excitons distribution through pressure treatment Zn-IPA frameworks. A novel metal-ligand asymmetrical chelate coordination is successfully integrated into the after high-pressure over ~20.0 GPa. This modification unexpectedly endows targeted sample new emergent electronic state narrow singlet-triplet energy gap, which effectively accelerates spin-flipping process for boosted population. Time delay phosphor-converted light-emitting diodes are fabricated long time up ~7 s switching off, providing significant advancements time-delay lighting applications. Pressure-treatment can alter optical properties Here authors induce amorphization remains decompression enables efficient narrowing gap.

Language: Английский

Citations

1
Pressure‐Tailored π–π Stacking in Dimers Enhances Blue Photoluminescence in Boron‐Based Organic Molecules DOI Open Access

Jingqi Ruan,

Yixuan Wang, Baozhu Yang

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 11, 2025

Abstract Organic materials with exceptional blue photoluminescence have emerged as a captivating class of materials, exhibiting promising applications full‐color display and solid‐state lighting. However, the quenching is largely unsolved problem towing to strong π – interaction in aggregation effect or electrostatic repulsion. Herein, strategy harvest remarkably enhanced emission phenylboric acid molecules intricate hydrogen bond networks through pressure treatment engineering proposed. Intriguingly, quantum yields pressure‐treated experiences significant enhancement from 2.3 % 31.5 %, which shows bright emission. The inhibition benzene ring vibration reduction stacking originating offset mode are highly responsible for photoluminescence. This work demonstrates feasibility modulating molecular patterns achieve efficient presents momentous improving optical properties organic materials.

Language: Английский

Citations

0
Pressure‐Promoted Self‐Trapped Exciton Emission and White‐Light Harvesting in Lead Halide Metal–Organic Frameworks at Ambient Conditions DOI Open Access

Yunfeng Yang,

Xiaohui Zhao,

Junyu Liang

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

Abstract Lead halide metal−organic frameworks (MOFs) possess unique advantages in preparing single‐component white‐light‐emitting (WLE) materials due to their broadband emission based on self‐trapping excitons (STEs). However, order obtain high‐quality white light emission, challenges remain adjusting and optimizing the color temperature coordinates of STE emission. Herein, we have achieved tunable with Commission International de l'Eclairage (0.32, 0.38) 5777 K at ambient conditions TMOF‐8(Cl) through pressure treatment. The irreversible lattice distortion after treatment reduces distance between [PbCl] + unit TDC 2− unit. enhanced hydrogen bonding interactions electronic coupling Pb‐ s orbitals ligand energy levels turn charge transfer (CT) channel from Adjusting degree can achieve regulation relative intensity CT thereby obtaining This study provides a new perspective modulation MOFs platform for development WLE materials.

Language: Английский

Citations

0
Space-confined charge transfer turns on multicolor emission in metal-organic frameworks via pressure treatment DOI Creative Commons
Ting Zhang, Yanfeng Yin, Xinyi Yang

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: May 5, 2025

Single-component multi-emissive materials with stimuli-responsive properties offer unique advantages in the field of multicolor-tunable photoluminescence (PL). However, precisely modulating emission each component and achieving high-efficiency present a formidable challenge. Herein, we demonstrate that space-confined charge transfer (CT) turns on bright blue-green-white initially faintly emissive metal-organic frameworks (MOFs) at ambient conditions through pressure treatments. Pressure treatments induce transition from initial long-range CT to mode, significantly amplifying radiative transitions. Furthermore, CT, which occurs between mutually perpendicular ligands, influences spin-orbit intersystem crossing. Precise tuning kinetics via multi-level allows us modulate fluorescence-to-phosphorescence ratio, target MOFs. Our work advances development smart PL unlocks potential for their application atmospheric environments.

Language: Английский

Citations

0
Pressure Regulated π–π Slip Enabling Blue‐Light Emission Enhancement of Terephthalic Acid DOI

Qing Yang,

Yixuan Wang,

Guangming Niu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Organic solid‐state luminescent materials give rise to widespread applications in the fields of detection sensors, flexible displays, and optoelectronic devices. However, it remains a significant challenge realize high‐efficiency emission organic systems owing undesired aggregation‐caused quenching. Herein, extraordinary enhancement terephthalic acid (TPA) is successfully achieved under high pressure. Significantly, unexpectedly captured down ambient conditions after pressure completely released, where photoluminescence quantum yield remarkably increased from 26.5% 74.1%. Experimental characterizations first‐principles calculations reveal that treatment engineering endows targeted TPA with enhanced hydrogen‐bond interactions decorated slipped π – staking arrangement. The configuration restricts vibration chemical bonds raises rotational energy barrier pressure‐treated TPA, resulting suppression nonradiative dissipation harvest high‐performance blue‐light emission. This study provides crucial insights into design pressure‐responsive solid significantly advances development materials.

Language: Английский

Citations

0