Strong Magnetically‐Responsive Circularly Polarized Phosphorescence and X‐Ray Scintillation in Ultrarobust Mn(II)–Organic Helical Chains

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(35)

Published: June 26, 2023

Over recent years, Mn(II)-organic materials showing circularly polarized luminescence (CPL) have attracted great interest because of their eco-friendliness, cheapness, and room temperature phosphorescence. Using the helicity design strategy, herein, chiral helical polymers are constructed featuring long-lived phosphorescence with exceptionally high glum ΦPL magnitudes 0.021% 89%, respectively, while remaining ultrarobust toward humidity, temperature, X-rays. Equally important, it is disclosed for first time that magnetic field has a remarkably negative effect on CPL Mn(II) materials, suppressing signal by 4.2-times at B⃗$\vec{B}$ = 1.6 T. designed UV-pumped light-emitting diodes fabricated, demonstrating enhanced optical selectivity under right- left-handed polarization conditions. On top all this, reported display bright triboluminescence excellent X-ray scintillation activity perfectly linear dose rate response up to 174 µGyair s-1 . Overall, these observations significantly contribute phenomenon multi-spin compounds promote highly efficient stable Mn(II)-based emitters.

Language: Английский

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Ultra-Broad-Band-Excitable Cu-Based Halide (C₄H₁₀N)₄Cu₄I₈ with High Stability for LED Applications

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(6), P. 3173 - 3180

Published: Feb. 1, 2024

Currently, organic–inorganic hybrid cuprous-based halides are receiving substantial attention for their eco-friendliness, distinctive structures, and outstanding photophysical properties. Nevertheless, most of the reported demand deep ultraviolet excitation with a narrow range that can meet commercial requirement. Herein, zero-dimensional (0D) halide (C4H10N)4Cu4I8 single crystals (SCs) were synthesized, an ultrabroad band ranging 260–450 nm greenish-yellow emission peaking at 560 nm. Excitingly, also features large Stokes shift 300 nm, high photoluminescence quantum yield (PLQY) up to 84.66%, long lifetime 137 μs. Furthermore, density functional theory calculations performed explore relationship between structure properties, performance originates from electron interactions in [Cu2I4]2– clusters. Taking advantage broad excellent photoluminescent performances, luminescence characteristic UV-pumped light-emitting diode (LED) device remarkable color stability was fabricated by employing as-synthesized SCs, which present promising applications low-dimensional solid-state lighting.

Language: Английский

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Luminescence regulation of Sb³⁺ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting

Opto-Electronic Advances, Journal Year: 2024, Volume and Issue: 7(3), P. 230197 - 230197

Published: Jan. 1, 2024

The Sb³⁺ doping strategy has been proven to be an effective way regulate the band gap and improve photophysical properties of organic-inorganic hybrid metal halides (OIHMHs). However, emission ions in OIHMHs is primarily confined low energy region, resulting yellow or red emissions. To date, there are few reports about green Sb³⁺-doped OIHMHs. Here, we present a novel approach for regulating luminescence 0D C₁₀H₂₂N₆InCl₇·H₂O via hydrogen bond network, which water molecules act as agents bonding. shows broadband peaking at 540 nm high photoluminescence quantum yield (PLQY) 80%. It found that intense stems from radiative recombination self-trapped excitons (STEs). Upon removal with heat, C₁₀H₂₂N₆In_1-xSb_xCl₇ generates emission, attributed breaking network large structural distortions excited state. Once adsorbed by C₁₀H₂₂N₆In_1-xSb_xCl₇, it can subsequently emit light. This water-induced reversible switching successfully used optical security information encryption. Our findings expand understanding how local coordination structure influences mechanism provide method control STEs emission.

Language: Английский

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Zero-Dimensional Copper(I) Halide Microcrystals as Highly Efficient Scintillators for Flexible X-ray Imaging

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(31), P. 41165 - 41175

Published: July 25, 2024

Commercially available rare-earth-doped inorganic oxide materials have been widely applied as X-ray scintillators, but the fragile characteristics, high detection limit, and harsh preparation condition seriously restrict their wide applications. Furthermore, it remains a huge challenge to realize flexible imaging technology for real-time monitoring of curving interface complex devices. To address these issues, we herein report two isostructural cuprous halides zero-dimensional (0D) [AEPipz]CuX3·X·H2O (AEPipz = N-aminoethylpiperazine, X Br I) with controllable size nanosize crystal highly efficient scintillators toward imaging. These exhibit cyan photoluminescence radioluminescence emissions highest quantum yield 92.1% light 62,400 photons MeV–1, respectively, surpassing most commercially scintillators. Meanwhile, ultralow limit 95.7 nGyair s–1 was far below dose required diagnosis (5.5 μGyair s–1). More significantly, film is facilely assembled excellent foldability crack resistance, which further acts scintillation screen achieving spatial resolution 17.4 lp mm–1 in imaging, demonstrating potential application wearable radiation radiography. The combined advantages yield, low flexibility promote 0D promising

Language: Английский

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In situ recrystallization of zero-dimensional hybrid metal halide glass-ceramics toward improved scintillation performance

Chemical Science, Journal Year: 2023, Volume and Issue: 14(43), P. 12238 - 12245

Published: Jan. 1, 2023

We have developed high-performance glass-ceramic scintillators via in situ recrystallization from zero-dimensional hybrid metal halide glass counterparts composed of distinct organic cations and inorganic anions.

Language: Английский

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Gd3+-sensitized rare earth fluoride scintillators for High-resolution flexible X-ray imaging

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 476, P. 146790 - 146790

Published: Oct. 20, 2023

Language: Английский

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Solvent-Free Grinding Synthesis of Hybrid Copper Halides for White Light Emission

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(19), P. 7296 - 7303

Published: May 3, 2023

Lead-free metal halides (LMHs) have recently attracted numerous attention in solid-state lighting due to their unique structures and outstanding optoelectronic properties. However, conventional preparation processes with the utilization of toxic organic solvents high temperatures seem impede commercial applications LMHs. In this work, we successfully synthesize Cu+-based (TMA)3Cu2Br5–xClx (TMA: tetramethylammonium) photoluminescence quantum yields (PLQYs) via a solvent-free mechanical grinding method. By changing ratio halide ions (Cl– Br–) precursors, emission wavelength prepared can be tuned from 535 587 nm, which are employed as emitters fabrication white-light-emitting diodes (WLEDs). The achieved WLEDs exhibit color rendering index value 84 standard Commission Internationale de l'Éclairage (CIE) coordinates (0.324, 0.333). This feasible strategy not only promotes mass production LMHs but also highlights promising potential for efficient illumination.

Language: Английский

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Efficient Single-Phase Tunable Dual-Color Luminescence with High Quantum Yield Greater than 100% for Information Encryption and LED Applications

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(8), P. 10325 - 10334

Published: Feb. 15, 2024

In modern society, the investigation of highly efficient photoluminescent bulk materials with excitation-induced tunable multicolor luminescence and multiexciton generation (MEG) is great significance to information security application optoelectronic devices. this study, two Cu-based halide crystals (C4H10NO)4Cu2Br5·Br (C4H10NO)4Cu2I5·I·H2O, respectively, one-dimensional structures were grown by a solvent evaporation method. Unexpectedly, (C4H10NO)4Cu2I5·I·H2O displayed dual-color luminescence; one band brilliant green-yellow emission centered at 547 nm high photoluminescence quantum yield (PLQY) up 169.67%, other red 695 PLQY 75.76%. Just as importantly, exhibits strong broadband 561 under broad excitation ranging from 252 350 nm, long PL decay lifetime 106.9 μs, an ultrahigh 198.22%. These represent first examples 1D Cu(I)-based halides that have exceeding 100%. Combining unusual characteristics theoretical calculations reveals MEG contributes > 100%, can be ascribed [Cu2I5]3– cluster-centered emission. Additionally, encryption method was designed based on Morse Code. The LED devices fabricated using appear lead promising applications in solid-state lighting. This work extends catalog high-performance luminescent also promotes prospects low-dimensional copper-based optoelectronics.

Language: Английский

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Dual-Emissive γ-[Cu₄I₈]^4– Enables Luminescent Thermochromism in an Organic–Inorganic Hybrid Copper(I) Halide

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(13), P. 5821 - 5830

Published: March 21, 2024

A highly luminescent (C13H28N2)2Cu4I8 single crystal containing isolated γ-[Cu4I8]4– anionic cluster was synthesized without the use of unsaturated cations. To best our knowledge, compounds bearing such like anions are not dual-emitting under UV excitation. However, dual emission does occur in (C13H28N2)2Cu4I8. Moreover, bands were found to be temperature-sensitive, allowing tuning colors from blue (0.19, 0.20) green (0.33, 0.47) Commission International de L' Eclairage (CIE) chromaticity coordinates. Remarkably, color could restored on returning initial temperature, confirming an efficient and reversible thermochromic effect The origin this excellent optical performance is discussed, difference mechanism with dual-emissive Cu(I) halide complexes also elucidated. Overall, work provides a promising way achieve thermochromism. developed represents one viable alternatives for eco-friendly materials.

Language: Английский

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Methanol‐Induced Crystallization of Chiral Hybrid Manganese (II) Chloride Single Crystals for Achieving Circularly Polarized Luminescence and Second Harmonic Generation

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 12(2)

Published: Aug. 17, 2023

Abstract Chiral hybrid Mn (II)‐based halides have attracted great interest in the optoelectronic field due to their low cost, non‐toxicity, abundant structural diversity, and excellent photoluminescence, chiroptical, nonlinear optical characteristics. Here, chiral hybrids (R/S‐MBA)MnCl 3 ·CH OH (MBA = C 6 H 5 CH(CH )NH + ) (R/S‐NPA)Cl·H 2 O (R, S‐NPA)Cl (NPA 10 7 single crystals are successfully obtained using methanol (CH OH) as an induced‐crystallization reagent by slow evaporation method. Interestingly, with obvious circular dichroism (CD) characteristics exhibit strong red emission originating from d‐d transition of 2+ cation, while (R/S‐NPA) Cl·H blue organic NPA group. Based on space group P 1 (no.4), show circularly polarized luminescence (CPL) a relatively high dissymmetry factor ( g lum value, which is equivalent that reported metal halides. Also, second harmonic generation (SHG) response. This work not only deepens understanding role methanol‐induced crystallization improving quality growth habits halide crystals, but also provides guidance for further design, crystal growth, applications multi‐functional materials.

Language: Английский

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