Achieving a Record Photoluminescence Quantum Yield in Green Light‐Emitting Carbon‐Centered Radicals with Nanosecond Emission Lifetimes DOI Open Access
Man Li, Xin Li, Ying‐Feng Han

et al.

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

Published: March 20, 2025

Abstract Organic luminescent radicals possess considerable potential for applications in organic light‐emitting diodes (OLEDs)‐based visible light communication owing to their intrinsic advantages of nanosecond emission lifetimes and spin‐allowed radiative transitions. However, the inherently narrow energy bandgap multiple nonradiative channels make it difficult achieve efficient green blue light‐emitting, which is not conducive applying diverse fields. In this study, a series carbon‐centered derived from N‐heterocyclic carbenes are designed synthesized, some exhibiting hybrid local charge‐transfer (HLCT) states that resulting emission. The results photophysical characterizations theoretical calculations demonstrate luminescence efficiency closely related states. This relationship inhibits while simultaneously opening HLCT but those with locally excited Intriguingly, high photoluminescence quantum yield value up 70.1% at 534 nm observed, highest among reported date. Based on exceptional result, an OLED device fabricated achieved external 8.8%. These its application electroluminescent devices.

Language: Английский

A Thermo‐Responsive MOFs for X‐Ray Scintillator DOI
Hongjun Li, Yi Li, Lin Zhang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: June 12, 2024

Abstract Thermo‐responsive smart materials have aroused extensive interest due to the particular significance of temperature sensing. Although various photoluminescent are explored in thermal detection, it is not applicable enough X‐ray radiation environment where accuracy and reliability will be influenced. Here, a strategy proposed by introducing concept radio‐luminescent functional building units (RBUs) construct thermo‐responsive lanthanide metal‐organic frameworks (Ln‐MOFs) scintillators for self‐calibrating thermometry. The rational designs RBUs (including organic ligand Tb 3+ /Eu ) with appropriate energy levels lead high‐performance radio‐luminescence. Ln‐MOFs exhibit perfect linear response X‐ray, presenting low dose rate detection limit (min ≈156.1 nGy air s ‐1 ). Self‐calibrating based on ratiometric XEL intensities achieved good absolute relative sensitivities 6.74 8.1%K , respectively. High light yield (max ≈39000 photons MeV −1 ), imaging spatial resolution ≈18 lp mm irradiation stability (intensity ≈100% at 368 K total up 215 Gy giant color transformation visualization benefit applications, especially situ imaging. Such provides promising way develop novel photonic excellent scintillator performances.

Language: Английский

Citations

30
Dynamic Reversible Full‐Color Piezochromic Fluorogens Featuring Through‐Space Charge‐Transfer Thermally Activated Delayed Fluorescence and their Application as X‐Ray Imaging Scintillators DOI
Wei Yang,

Chenlong Xie,

Tianhao Chen

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: Feb. 28, 2024

Abstract Thermally activated delayed fluorescence (TADF) emitters featuring through‐space charge transfer (TSCT) can be excellent candidates for piezochromic luminescent (PCL) materials due to their structural dynamics. Spatial donor‐acceptor (D−A) stacking arrangements enable the modulation of inter‐ and intramolecular D−A interactions, as well spatial states, under varying pressure conditions. Herein, we demonstrate an effective approach toward dynamic reversible full‐color PCL with TSCT‐TADF characteristics. Their single crystals exhibit a full‐color‐gamut process spanning range 170 nm. Moreover, TSCT‐TADF‐PCL display unity photoluminescence quantum yield, show promising application in X‐ray scintillator imaging.

Language: Английский

Citations

23
Through‐Space Charge‐Transfer Organogold(III) Complexes Enable High‐Performance X‐ray Scintillation and Imaging DOI
Tianhao Chen,

Yalun Xu,

Ao Ying

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(18)

Published: March 2, 2024

Abstract Organic scintillators have recently attracted growing attention for X‐ray detection in industrial and medical applications. However, these materials still face critical obstacles of low attenuation efficiency and/or inefficient triplet exciton utilization. Here we developed a new category organogold(III) complexes, Tp‐Au‐1 Tp‐Au‐2 , through adopting through‐space interaction motif to realize high efficient harvesting excitons emission. Thanks the charge transfer process, this panel complexes achieved higher photoluminescence quantum yield shorter radiative lifetimes compared with through‐bond reference complexes. Inspiringly, exhibited polarity‐dependent emission origins: thermally activated delayed fluorescence phosphorescence. Under irradiation, manifested intense radioluminescence together record‐high scintillation light 77,600 photons MeV −1 organic scintillators. The resulting scintillator screens demonstrated high‐quality imaging >16.0 line pairs mm spatial resolution, outstripping most inorganic This finding provides feasible strategy design superior

Language: Английский

Citations

14
Efficient metal free organic radical scintillators DOI Creative Commons

Ansheng Luo,

Jingru Zhang,

Dongjie Xiao

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 18, 2024

Language: Английский

Citations

13
Programmable Singlet Oxygen Battery for Automated Photodynamic Therapy Enabled by Pyridone–Pyridine Tautomer Engineering DOI

Jianwu Tian,

Bowen Li, Chongzhi Wu

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(24), P. 16458 - 16468

Published: May 16, 2024

The efficacy of photodynamic therapy is hindered by the hypoxic environment in tumors and limited light penetration depth. singlet oxygen battery (SOB) has emerged as a promising solution, enabling oxygen- light-independent 1O2 release. However, conventional SOB systems typically exhibit an "always-ON" release, leading to potential leakage before after treatment. This not only compromises therapeutic outcomes but also raises substantial biosafety concerns. In this work, we introduce programmable battery, engineered address all issues discussed above. concept illustrated through development tumor-microenvironment-responsive pyridone–pyridine switch, PyAce, which exists two tautomeric forms: PyAce-0 (pyridine) PyAce (pyridone) with different storage half-lives. its native state, remains pyridone form, capable storing (t1/2 = 18.5 h). Upon reaching tumor microenvironment, switched pyridine facilitating rapid thorough release 16 min), followed quenched post-therapy. mechanism ensures suppressed production pre- post-therapy selective at site, maximizing while minimizing side effects. achieved "OFF–ON–OFF" showed high spatiotemporal selectivity was independent supply illumination.

Language: Английский

Citations

11
Phosphonium Iodide Featuring Blue Thermally Activated Delayed Fluorescence for Highly Efficient X‐Ray Scintillator DOI

Jun‐Hua Wei,

Jianbin Luo,

Zi‐Lin He

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(46)

Published: July 5, 2024

Organic scintillators are praised for their abundant element reserves, facile preparation procedures, and rich structures. However, the weak X-ray attenuation ability low exciton utilization efficiency result in unsatisfactory scintillation performance. Herein, a new family of highly efficient organic phosphonium halide salts with thermally activated delayed fluorescence (TADF) designed by innovatively adopting quaternary as electron acceptor, while dimethylamine group anions (I

Language: Английский

Citations

8
Probing Energy‐Funneling Kinetics in Nanocrystal Sublattices for Superior X‐Ray Imaging DOI

Qinxia Wu,

Xinqi Xu, Xiaokun Li

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(25)

Published: April 18, 2024

Long-lasting radioluminescence scintillators have recently attracted substantial attention from both research and industrial communities, primarily due to their distinctive capabilities of converting storing X-ray energy. However, determination energy-conversion kinetics in these nanocrystals remains unexplored. Here we present a strategy probe unveil energy-funneling NaLuF

Language: Английский

Citations

7
Dual-quartet phosphorescent emission in the open-shell M1Ag13 (M = Pt, Pd) nanoclusters DOI Creative Commons

Cao Fang,

Chang Xu,

Wei Zhang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 16, 2024

Abstract Dual emission (DE) in nanoclusters (NCs) is considerably significant the research and application of ratiometric sensing, bioimaging, novel optoelectronic devices. Exploring DE mechanism open-shell NCs with doublet or quartet emissions remains challenging because synthesizing difficult due to their inherent instability. Here, we synthesize two dual-emissive M 1 Ag 13 (PFBT) 6 (TPP) 7 (M = Pt, Pd; PFBT pentafluorobenzenethiol; TPP triphenylphosphine) a 7-electron configuration reveal mechanism. Both comprise crown-like 11 kernel Pt Pd center surrounded by five PPh 3 ligands Ag(SR) (PPh ) motifs. The combined experimental theoretical studies revealed origin . Specifically, high-energy visible low-energy near-infrared arise from distinct excited states: core-shell charge transfer core-based states, respectively. Moreover, are found play an important role existence DE, as its low-lying π * levels result energetically accessible transitions. This report on dual-quartet phosphorescent electronic advances insights into promotes potential magnetoluminescence

Language: Английский

Citations

7
Engineering Air-Stable Triarylmethyl Radicals with One Pyrrole Ring DOI
Pengfei Dong, Zhenghui Li,

Kuang Gu

et al.

Organic Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Herein, seven air-stable triarylmethyl radicals (

Language: Английский

Citations

1
Mn(II)-Doped Perovskites with Carboxylic Acid Dimers Exhibiting Scintillation DOI
Tianqi Chen, Wenhao Yang,

Cui‐Mi Shi

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Layered hybrid metal halide perovskites, characterized by their distinctive quantum well structures and significant exciton binding energies, exhibit exceptional fluorescence properties, rendering them ideal candidates for high light yield scintillators. However, challenges remain in synthesizing layered perovskites with photoluminescence yields (PLQY), large Stokes shifts, stable radioluminescence (RL). In this study, a Mn(II)-doped perovskite was successfully synthesized. Structural rigidity is largely enhanced the unique carboxylic acid dimers, as result reducing nonradiative recombination induced stretching vibration. Mn(II) doping into (HOOC6H10NH3)2PbBr4 allows efficient energy transfer, which optimizes luminescence performance. The effects of self-absorption are almost eliminated shift doping. 4T1g-6A1g transition induces pronounced orange-red emission at 613 nm, PLQY significantly increasing from 14.76% to 64.24%. Additionally, scintillator demonstrates an outstanding 28,600 photons/MeV low detection limit 100.8 nGyair/s, maintaining stability under continuous X-ray exposure. These properties render it applications luminescent devices

Language: Английский

Citations

1