Pressure effects on metal/covalent-organic frameworks: structural and optical properties

Science China Chemistry, Год журнала: 2024, Номер 67(9), С. 2890 - 2903

Опубликована: Май 23, 2024

Язык: Английский

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Pressure‐induced emission (PIE) in halide perovskites toward promising applications in scintillators and solid‐state lighting

Aggregate, Год журнала: 2023, Номер 5(1)

Опубликована: Ноя. 8, 2023

Abstract High‐pressure chemistry has provided a huge boost to the development of scientific community. Pressure‐induced emission (PIE) in halide perovskites is gradually showing its unique charm both pressure sensing and optoelectronic device applications. Moreover, PIE retention under ambient conditions great commercial value. Herein, we mainly focus on potential applications metal for scintillators solid‐state lighting. Based performance requirements scintillator single‐component white light‐emitting diodes (WLEDs), significance critically clarified, aiming design synthesize materials used high‐performance devices. This perspective not only demonstrates promising fields WLEDs, but also provides display imaging anti‐counterfeiting materials. Furthermore, solving disputes that exist simply discussed as an outlook by introducing high‐pressure dimension produce PIE.

Язык: Английский

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Regulating Planarized Intramolecular Charge Transfer for Efficient Single-Phase White-Light Emission in Undoped Metal–Organic Framework Nanocrystals

Nano Letters, Год журнала: 2024, Номер 24(32), С. 9898 - 9905

Опубликована: Июль 15, 2024

The technology of combining multiple emission centers to exploit white-light-emitting (WLE) materials by taking advantage porous metal-organic frameworks (MOFs) is mature, but preparing undoped WLE MOFs remains a challenge. Herein, pressure-treated strategy reported achieve efficient white photoluminescence (PL) in [Zn(Tdc)(py)]

Язык: Английский

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Pressure-Induced Structural Phase Transitions and Photoluminescence Properties of Micro/Nanocrystals HoF₃

Inorganic Chemistry, Год журнала: 2024, Номер 63(43), С. 20562 - 20571

Опубликована: Окт. 15, 2024

HoF

Язык: Английский

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Quantitative regulation of electron–phonon coupling

Reports on Progress in Physics, Год журнала: 2024, Номер 87(7), С. 078001 - 078001

Опубликована: Июль 1, 2024

Electron-phonon (e-p) coupling plays a crucial role in various physical phenomena, and regulation of e-p is vital for the exploration design high-performance materials. However, current research on this topic lacks accurate quantification, hindering further understanding underlying processes its applications. In work, we demonstrate quantitative coupling, by pressure engineering

Язык: Английский

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Realizing long range π-conjugation in phenanthrene and phenanthrene-based molecular crystals for anomalous piezoluminescence

Chemical Science, Год журнала: 2023, Номер 14(42), С. 11629 - 11637

Опубликована: Янв. 1, 2023

A long range π-conjugation has been realized by the designed π–π interactions in phenanthrene/phenanthrene-based molecular crystals, forming “transannular effect”, which can be amplified high pressure and induce novel piezoluminescence.

Язык: Английский

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Lighting Up Nonemissive Azobenzene Derivatives by Pressure

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(42), С. 28961 - 28972

Опубликована: Сен. 16, 2024

Pressure-induced emission (PIE) is a compelling phenomenon that can activate luminescence within nonemissive materials. However, PIE in organic materials has never been achieved. Herein, we present the first observation of an system, specifically azobenzene derivatives. The 1,2-bis(4-(anthracen-9-yl)phenyl)diazene was activated at 0.52 GPa, primarily driven by local excitation promotion induced molecular conformational changes. Complete photoisomerization suppression molecule observed 1.5 concurrently accelerating enhancement to 3.53 GPa. Differing from key role isomerization inhibition conventional perception, our findings demonstrate excited-state constituent decisive factor for activation, providing potentially universal approach high-efficiency emission. Additionally, replicated analogue 1,2-bis(4-(9

Язык: Английский

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Strengthening C–H⋯π intermolecular interactions induces emission enhancement of anthracene derivatives under high pressure

Journal of Materials Chemistry C, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

The crystal of an anthracene-based derivative with a carbazole steric hindrance group shows enhanced fluorescence when compressed from 1 atm to 1.0 GPa due strengthened C–H⋯π interactions.

Язык: Английский

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

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Фев. 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.

Язык: Английский

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Pressure-Driven Circularly Polarized Luminescence Enhancement and Chirality Amplification

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Achieving ultrahigh-color-purity circularly polarized luminescence (CPL) in low-dimensional chiral perovskites is challenging due to strong electron–phonon coupling caused by lead halide octahedral distortion. Herein, the piezoluminescence behaviors of six novel perovskites, (S/R-3-XPEA)2PbBr4 (PEA = phenethylamine; X F, Cl, Br), were systematically investigated. Upon compression, (S/R-3-ClPEA)2PbBr4 exhibits significant piezofluorochromic behaviors, transforming from yellow CPL deep-blue CPL. At 2.5 GPa, intensity increases an order magnitude and its asymmetry factors (glum) are amplified initial ±0.03 ±0.1. (S/R-3-BrPEA)2PbBr4 presents a similar piezochromic response, realizing at 1.7 while (S/R-3-FPEA)2PbBr4 retains under high pressure. High-pressure structural characterization theoretical calculations confirm that pressure-enhanced halogen bonds reduce penetration depth S/R-3-BrPEA+ S/R-3-ClPEA+ into [PbBr6]4– frameworks, significantly suppressing increasing magnetic transition dipole moment (S/R-3-ClPEA)2PbBr4, which responsible for ultrahigh-purity chirality amplification, respectively.

Язык: Английский

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