Scaffolding and Heavy-Atom Effects of Metal Chains Enhanced Tunable Long Persistent Luminescence in Metal–Organic Frameworks DOI

Xudong Xue,

Zheng Wang

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 64(1), P. 435 - 442

Published: Dec. 28, 2024

Metal–organic frameworks (MOFs) with long persistent luminescence (LPL) have attracted extensive research attention due to their potential applications in information encryption, anticounterfeiting technology, and security logic. The strategic combinations of organic phosphor linkers metal ions lead tremendous frameworks, which could unveil many undiscovered properties organics. Here, the synthesis characterization a three-dimensional MOF (Cd-MOF) is reported, demonstrates enhanced blue photoluminescence phosphorescent lifetime 124 ms as compared pristine linker (H2L) under ambient conditions scaffolding heavy-atom effects chains framework. Notably, Cd-MOF exhibits intriguing excitation-, time-, temperature-dependent LPL, duration 3 s at room temperature ability shift from green yellow lower temperatures. Optical characterizations theoretical calculations reveal that H2L molecules are responsible for emissions Cd-MOF, while LPL molecular phosphors can be significantly regulated through coordination interactions effect chains. This work highlights such materials promising candidates multiple anticounterfeiting, displaying, encryption applications.

Language: Английский

Modulation of Near‐Infrared Afterglow Luminescence in Inorganic Nanomaterials for Biological Applications DOI Open Access

Linshuo Gao,

Yawei Liu, Juanjuan Su

et al.

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

Published: March 10, 2025

Near-infrared afterglow luminescent inorganic nanomaterials (NIR-ALINs) possess the unique property of continuing to emit near-infrared (NIR) luminescence after excitation ceases. They demonstrate excellent photostability, deep tissue penetration, and high imaging signal-to-noise ratio (SNR). Additionally, NIR-ALINs can be re-excited in vivo using visible (Vis), NIR light or X-rays, which avoids need for continuous situ excitation, thus eliminating autofluorescence biological tissues reducing tediousness multiple injections. These features make particularly attractive applications. In recent years, a series with prolonged time enhanced intensity have been discovered. However, development still faces significant challenges, as their performance is usually insufficient satisfy practical There lack systematic analysis strategies regulation nanomaterials. This review highlights rational design modulation NIR-ALINs, focusing on host substrate selection, trap engineering surface modification. Moreover, applications bioimaging, bio-detection disease therapy are summarized. Finally, present challenges perspectives applications, such properties unclear biosafety, also discussed.

Language: Английский

Citations

0
Organic Ionic Host–Guest Phosphor with Dual-Confined Nonradiation for Constructing Ultrahigh-Temperature X-ray Scintillator DOI
Ying Wang, Jiahong Yu,

Zixing Zhou

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Scintillators with X-ray-excitable luminescence have attracted great attention in the fields of medical radiography, nondestructive inspection, and high-energy physics. However, thermal quenching significantly reduces radioluminescence efficiency, particularly for those phosphorescent scintillators promising radiation-induced triplet exciton utilization, ultimately limiting their applications high-temperature scenarios. Herein, we develop ultrahigh-temperature based on organic ionic host–guest phosphorescence systems unprecedented thermal-stable emissions up to 673 K. The guest phosphor features spin-vibronic coupling-assisted intersystem crossing, effectively transforming thermally activated delayed fluorescence overcoming inactivation excitons. Meanwhile, rigid host robust electrostatic interactions minimize both intrinsic extrinsic nonradiations excitons, so-called dual-confined nonradiation. These two mechanisms work synergistically, contributing highly efficient exciton-based a room-temperature efficiency 38.7% ultrahigh-temperature-resistant dual emissions. Such an innovative scintillator achieves impressively low X-ray detection limit 71.5 nGy s–1 remarkably bright photoluminescence (efficiency 80.4% at 483 K), enabling imaging.

Language: Английский

Citations

0
Enabling Multicolor Circularly Polarized Organic Long Persistent Luminescence through Chiral Exciplex DOI
Hui Li, Xin Zhang,

Cheng Tan

et al.

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

Published: April 1, 2025

Abstract Circularly polarized organic long persistent luminescence (CP‐OLPL) has garnered significant attention due to its distinctive properties. However, achieving CP‐OLPL materials with ultralong durations remains a formidable challenge. Herein, an effective strategy is proposed obtain long‐lived by constructing self‐designed chiral donor for developing host–guest exciplex system. The gradual recombination of charge‐separated states enables green emission persist over 1.5 hours asymmetry factor (| g lum |) 4.5 × 10 −3 . More intriguingly, doping rubrene fluorophore yields orange‐red system, exhibiting duration 1 hour and | 2.3 through synergistic singlet‐singlet chirality energy transfer. These properties render the development afterglow display, multi‐level information encryption, lighting. This work not only represents advancement in design donors system but also provides valuable insights into exciton dynamics.

Language: Английский

Citations

0
Day‐Long Organic Persistent Luminescence in Flexible Polymeric Materials DOI

Longming Jin,

Wanqi Mo,

Ziyi Wang

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract The progress in organic afterglow materials has drawn significant attention due to their extensive applications fields such as optoelectronics, anti‐counterfeiting, and bioimaging. Nonetheless, a general limitation of is short emission lifetimes, typically spanning from milliseconds seconds, which creates substantial challenge developing day‐long (DOA). In this study, DOA system demonstrated through the incorporation electron donor/acceptor exciplexes. Polyethylene naphthalate used for both acceptor charge storage units, coupling with spirobifluorene‐carbazole derivative donor, providing effective separations under UV‐light sunlight excitation. resulting polymers demonstrate an exceptional bluish‐green that endures over 28 h ambient conditions, setting new record longest duration polymeric materials. Moreover, DOA‐doped polymers, films fibers, exhibit outstanding flexibility transparency, making them highly suitable flexible technologies wearable devices.

Language: Английский

Citations

0
Day‐Long Organic Persistent Luminescence in Flexible Polymeric Materials DOI

Longming Jin,

Wanqi Mo,

Ziyi Wang

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract The progress in organic afterglow materials has drawn significant attention due to their extensive applications fields such as optoelectronics, anti‐counterfeiting, and bioimaging. Nonetheless, a general limitation of is short emission lifetimes, typically spanning from milliseconds seconds, which creates substantial challenge developing day‐long (DOA). In this study, DOA system demonstrated through the incorporation electron donor/acceptor exciplexes. Polyethylene naphthalate used for both acceptor charge storage units, coupling with spirobifluorene‐carbazole derivative donor, providing effective separations under UV‐light sunlight excitation. resulting polymers demonstrate an exceptional bluish‐green that endures over 28 h ambient conditions, setting new record longest duration polymeric materials. Moreover, DOA‐doped polymers, films fibers, exhibit outstanding flexibility transparency, making them highly suitable flexible technologies wearable devices.

Language: Английский

Citations

0
Through‐space interaction enables simultaneous enhancements of kr and kRISC in highly efficient spiro‐acridine based thermally activated delayed fluorescence emitter with acridone acceptor DOI Creative Commons
Yongqiang Mei, Di Liu, Jiuyan Li

et al.

Smart Molecules, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Abstract Most of acridine based thermally activated delayed fluorescence (TADF) emitters are characterized by advantageous reverse intersystem crossing (RISC) rate ( k RISC s) due to the perpendicular orientation donor acceptor moiety, but suffer from a poor radiation r ) typically in order 10 6 s −1 . Herein, two sky blue TADF 3,6‐DMAC‐AD‐Py and 3,6‐SFAC‐AD‐Py were developed linking (DMAC) spiro‐fluorene‐acridine (SFAC) donors 10‐(pyridin‐2‐yl)acridin‐9(10 H )‐one (AD‐Py) acceptor. Larger SFAC electron‐deficient pyridyl groups deliberately incorporated since unique through‐space interaction between them is designed drive rotation inner ring for enhancing frontier molecular orbitals overlap while keeping decent behavior. Thus, increased 1.5 × 7 Simultaneously, improve spin orbital coupling strength reduce energy gaps, generating 1.8 This first emitter realizing strategy. enables highly efficient sky‐blue organic light‐emitting diode with maximum external quantum efficiency (EQE) 34.7% Commission International de I'Eclairage coordinates (0.19, 0.37). More importantly, EQE still remained 27.6% 16.9% at high brightness 1000 10,000 cd m −2

Language: Английский

Citations

0
Scaffolding and Heavy-Atom Effects of Metal Chains Enhanced Tunable Long Persistent Luminescence in Metal–Organic Frameworks DOI

Xudong Xue,

Zheng Wang

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 64(1), P. 435 - 442

Published: Dec. 28, 2024

Metal–organic frameworks (MOFs) with long persistent luminescence (LPL) have attracted extensive research attention due to their potential applications in information encryption, anticounterfeiting technology, and security logic. The strategic combinations of organic phosphor linkers metal ions lead tremendous frameworks, which could unveil many undiscovered properties organics. Here, the synthesis characterization a three-dimensional MOF (Cd-MOF) is reported, demonstrates enhanced blue photoluminescence phosphorescent lifetime 124 ms as compared pristine linker (H2L) under ambient conditions scaffolding heavy-atom effects chains framework. Notably, Cd-MOF exhibits intriguing excitation-, time-, temperature-dependent LPL, duration 3 s at room temperature ability shift from green yellow lower temperatures. Optical characterizations theoretical calculations reveal that H2L molecules are responsible for emissions Cd-MOF, while LPL molecular phosphors can be significantly regulated through coordination interactions effect chains. This work highlights such materials promising candidates multiple anticounterfeiting, displaying, encryption applications.

Language: Английский

Citations

0