Halogen-bonded charge-transfer co-crystal scintillators for high-resolution X-ray imaging

Chemical Science, Journal Year: 2024, Volume and Issue: 15(20), P. 7659 - 7666

Published: Jan. 1, 2024

Two organic halogen co-crystal scintillators with strong halogen-bond-induced charge-transfer interactions enable a fast response, low detection limit and ultra-high-resolution imaging.

Language: Английский

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Persistent scintillators for X-ray repetitive imaging with stable energy traps

Journal of Rare Earths, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Temperature-Adaptive Organic Scintillators for X-ray Radiography

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 16, 2024

Organic phosphorescence or thermally activated delayed fluorescence (TADF) scintillators, while effective in utilizing triplet excitons, are sensitive to temperature changes, which can impact radioluminescence performance. In this study, we have developed a type of temperature-adaptive organic scintillator with and TADF dual emission. These scintillators automatically switch modes enabling efficient from 77 400 K. The highest photoluminescence quantum yield light 83.2% 78,229 ± 562 photons MeV

Language: Английский

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(μ-Pentafluorophenylthiorato)(o-bis(diphenylphosphino)benzene) Silver(I) Dimer

Molbank, Journal Year: 2025, Volume and Issue: 2025(1), P. M1970 - M1970

Published: Feb. 20, 2025

This study reports the synthesis and characterization of a novel thiolate-bridged heteroleptic dinuclear silver(I) complex, [Ag(μ-C6F5S)(dppbz)]2, incorporating o-bis(diphenylphosphino)benzene (dppbz). The complex was synthesized in high yield via reaction oxide with pentafluorothiophenol dppbz. Single crystal X-ray diffraction analysis revealed distorted tetrahedral structure an Ag2S2 core, where each Ag atom is coordinated by Ag…Ag distance (3.2652(3) Å) suggests weak argentophilic interaction. Notably, uncommon intermolecular fluorine-fluorine contact observed, likely stabilized hydrogen bonding stabilizing structure. shows luminescence under UV radiation emission maximum at 514 nm.

Language: Английский

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Fullerene-Functionalized Cellulosic Hydrogel Biosensor with Bacterial Turn-on Fluorescence Response Derived from Carboxymethyl Cellulose for Intelligent Food Packaging with DFT Calculations and Molecular Docking

Gels, Journal Year: 2025, Volume and Issue: 11(5), P. 329 - 329

Published: April 28, 2025

This study reports the synthesis and characterization of a novel carboxymethyl cellulose–N-fullerene–g-poly(co-acrylamido-2-methyl-1-propane sulfonic acid) (CMC–N-fullerene–AMPS) hydrogel for potential application in biosensing within food packaging. The was synthesized via free radical polymerization characterized using FTIR, SEM, fluorescence microscopy. FTIR analysis confirmed successful grafting AMPS incorporation N-fullerenes, indicated by characteristic peaks shift N–H/O–H stretching frequency. Density Functional Theory (DFT) calculations revealed that CMC–N-fullerene–AMPS exhibited higher stability lower band gap energy (0.0871 eV) compared to CMC–AMPS hydrogel, which means high reactivity CMC–N-fullerene–AMPS. N-fullerenes significantly enhanced hydrogel’s antibacterial activity, demonstrating 22 mm inhibition zone against E. coli 24 S. aureus, suggesting active packaging applications. Critically, displayed unique “turn-on” response presence bacteria, with distinct color changes observed upon interaction (orange-red) aureus (bright green). enhancement, coupled porous morphology SEM (pore size 377–931 µm), suggests this as sensing platform bacterial contamination These combined properties activity distinct, bacteria-induced signal make promising candidate developing intelligent materials capable detecting spoilage.

Language: Английский

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Crown Ether‐Assisted Alkali‐Metal Copper(I) Iodide Supramolecular Scintillators with Near‐Unity Emission for Ultrahigh‐Resolution X‐Ray Imaging

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

Published: March 17, 2025

Abstract Harnessing supramolecular interactions to regulate the structure and performance of functional materials is a key challenge in chemistry. Herein, study utilizes 18‐crown‐6 (18C6) ether‐assisted alkali‐metal (Na, K, Cs) copper(I) iodide assemblies precisely material structures. This approach facilitated transition from 1D mono‐royal crown coordination (18C6@KCuI 2 , CKCI) 0D di‐royal ((18C6) @Na (H O) 3 Cu 4 I 6 CNCI) tri‐royal @Cs CCCI) Interestingly, CCCI single‐crystal exhibits outstanding scintillation properties, with high relative light yield 71 000 photons MeV −1 an ultralow detection limit 39.3 nGy s which can be attributed synergistic effects 18C6 copper‐iodide clusters. It stabilizes self‐trapped exciton state, enhances localization, reduces non‐radiative losses, thus resulting large Stokes shift 193 nm near‐unity photoluminescence quantum 99.4%. Additionally, promote crystal nucleation growth, making it easy prepare centimeter‐scale transparent single crystals >80% transmittance, such as achieve ultrahigh‐resolution X‐ray imaging 26.3 lp mm . demonstrates that halide scintillators regulated through interactions, provides new for developing high‐performance scintillator materials.

Language: Английский

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Alkynyl copper(I) nanoclusters with thermally activated delayed fluorescence as efficient scintillator for X-ray imaging

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Language: Английский

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Multiple Electron Transfer in Semiconductive Ternary D‐D'‐A Metal‐Organic Framework for Enhanced X‐Ray Detection and Imaging

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 22, 2024

Abstract Semiconductive metal–organic frameworks (MOFs) with donor–acceptor (D–A) characteristics have garnered attractive attention due to their capacity for separating and transferring photogenerated charges, making them promising candidates high‐performance X‐ray detectors. However, the low charge transfer efficiency between metal nodes organic ligands limits X‐ray‐to‐electricity conversion of these materials. Herein, an additional photoactive donor (D’) is introduced by incorporating a heavy atom‐containing polyoxometalate (POM) [α‐SiW 12 O 40 ] 4− into binary {[Ni·bcbp·(H 2 O) ]·(H 4 ·Cl} n (Ni‐bcbp, bcbp: H bcbp·2Cl = 1,1′‐bis(4‐carboxyphenyl)(4,4′‐bipyridinium) dichloride) MOF, resulting in semiconductive ternary D‐D'‐A framework {[Ni (bcbp) ·(H ·(DMA)]·(SiW )} (SiW@Ni‐bcbp, DMA: dimethylacetamide). The obtained material features unprecedented porous 8‐connected bcu‐net structure that accommodates nanoscale counterions, displaying uncommon optoelectronic responses. In contrast Ni‐bcbp, SiW@Ni‐bcbp exhibits distinctive photochromism robust responsiveness, which can be attributed synergistic effects electron reservoir multiple photoinduced originating from POMs. As result, detector based on demonstrates sensitivity 5741.6 µC Gy air −1 cm −2 detection limit 0.49 µGy s . Moreover, devices demonstrated capability producing clearness images, providing feasible stable solution constructing direct

Language: Английский

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Reversible Interconversion between Ag₂ and Ag₆ Clusters and Their Responsive Optical Properties

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 7, 2024

The exploration of structural interconversion in clusters triggered by external stimuli has attracted significant interest due to its potential elucidate structure-property relationships metal clusters. In this study, two types silver clusters, Ag

Language: Английский

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Hot Exciton Organic Glassy Scintillator for High-Resolution X-ray Imaging

Chemical Science, Journal Year: 2024, Volume and Issue: 15(45), P. 18933 - 18942

Published: Jan. 1, 2024

Hot exciton organic scintillators offer promising prospects due to their efficient generation of bright triplet excitons and ultrafast response time, having potential applications in security detection medical diagnostics. However, fabricating large-area, highly transparent scintillator screens still remains challenging, impeding the realization high-resolution X-ray imaging. Herein, we firstly demonstrate a novel highly-transparent hot glassy (>87% transmittance @ 450-800 nm), produced using low-temperature melt-quenching method with 2',5'-difluoro-

Language: Английский

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