The effect of solvent on the formation of low-dimensional metal halides and their self-trapped exciton emission

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150257 - 150257

Published: March 8, 2024

Low-dimensional organic–inorganic hybrid metal halides, with broadband luminescence, have attracted much attention for optoelectronic applications due to their rich in structural diversity and solution processibility. However, it is still unclear about how the solvent molecules influence properties of processed low-dimensional halides. Here, we prepared five different antimony-based crystal structures, [SbCl6]3- as halide octahedron 4, 4-difluoropiperidine (DFPD+) organic cation, by using solvents: hydrochloric acid (HCl) aqueous four solvents (dimethylformamide (DMF), methanol (MeOH), acetonitrile (ACN) dimethylacetamide (DMAC)). We revealed relation between structures optical properties, found participation structure causes significant lattice distortions, which beneficial achieving self-trapped exciton (STE) emission. Among them, (DFPD)6SbCl9·2DMAC exhibits a remarkable photoluminescence (PL) quantum yield approximately 90 %. The STE dynamics were characterized femtosecond transient absorption time-resolved PL spectroscopies. Simultaneously, this study also provides new directions expanding application luminescent halides: addition UV-LEDs, efficient rapid detection or can be achieved raw materials, while realizing potential multi-level anti-counterfeiting.

Language: Английский

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Stimuli‐Responsive Emission from Hybrid Metal Halides

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(17)

Published: Jan. 7, 2024

Abstract Stimuli‐responsive photoluminescent (PL) materials have attracted considerable attention in recent years owing to their potential applications anti‐counterfeiting, information encryption, and sensing. Further investigations of the transformation mechanism stimulus‐responsive PL are considerably important. In current study, an organic–inorganic metal halide, C 9 H 15 N 3 SbCl 5 ([C 13 ] 2+ is a 1‐(2‐pyridyl) piperazine cation) obtained, which exhibits 0D structure with P‐ 1 space group. At room temperature, when excited by UV light, single crystals exhibit unimodal blue light emission at 405 nm, grinding or hydrostatic pressure induces double‐peak emissions 650 nm. Interestingly, double‐emission samples can be restored single‐emission short annealing storage air for 2 weeks, this process reversible. Luminescence response mechanical stimuli also achieved presence hydrochloric acid water. Spectral analysis microstructural changes revealed that structural modifications inorganic group play pivotal role stimulus. Finally, composite film device based on prepared demonstrate these smart anti‐counterfeiting sensing applications.

Language: Английский

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Large-Area Transparent Antimony-Based Perovskite Glass for High-Resolution X-ray Imaging

ACS Nano, Journal Year: 2024, Volume and Issue: 18(26), P. 16715 - 16725

Published: June 14, 2024

Nonlead low-dimensional halide perovskites attract considerable attention as X-ray scintillators. However, most scintillation screens exhibit pronounced light scattering, which detrimentally reduces the quality of imaging. Herein, we employed a simple and straightforward solvent-free melt-quenching method to fabricate large-area zero-dimension (0D) antimony-based perovskite transparent medium, namely (C

Language: Английский

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Realizing efficient broadband near-infrared emission and multimode photoluminescence switching via coordination structure modulation in Sb³⁺-doped 0D organic metal chlorides

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(9), P. 2230 - 2241

Published: Jan. 1, 2024

We developed three NIR emitters of Sb 3+ -doped 0D organic metal chlorides and demonstrated their night vision applications in vision. One shows tunable emission characteristics quintuple-mode fluorescence anti-counterfeiting information encryption.

Language: Английский

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Flexible Crystal Heterojunctions of Low-Dimensional Organic Metal Halides Enabling Color-Tunable Space-Resolved Optical Waveguides

Research, Journal Year: 2023, Volume and Issue: 6

Published: Jan. 1, 2023

Molecular luminescent materials with optical waveguide have wide application prospects in light-emitting diodes, sensors, and logic gates. However, the majority of traditional systems are based on brittle molecular crystals, which limited fabrication, transportation, storage, adaptation flexible devices under diverse situations. To date, design synthesis photofunctional high flexibility, novel waveguide, multi-port color-tunable emission same solid-state system remain an open challenge. Here, we constructed new types zero-dimensional organic metal halides (Au-4-dimethylaminopyridine [DMAP] In-DMAP) a rarely elasticity rather low loss coefficients for waveguide. Theoretical calculations intermolecular interactions showed that 2 crystalline was original from their herringbone structure slip plane. Based one-dimensional microrods crystals 2-dimensional microplate Mn-DMAP, heterojunctions multi-color space-resolved waveguides been fabricated. The formation mechanism is surface selective growth account lattice mismatch ratio between contacting crystal planes. Therefore, this work describes first attempt to metal-halide-based flexibility expanding smart devices, such as gates multiplexers.

Language: Английский

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Variable halide perovskites: diversification of anti-counterfeiting applications

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(23), P. 6085 - 6106

Published: Jan. 1, 2023

This review emphasizes how the dimensionality, coordination number and bond length of halide perovskites (HPs) regulate their photoluminescence. HPs have good application potential due to sensitivity light, solvent, heat etc ., facilitating anti-counterfeiting encryption/decryption.

Language: Английский

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Near Ultraviolet‐Excitable Cyan‐Emissive Hybrid Copper(I) Halides Nonlinear Optical Crystals with Near‐Unity Photoluminescence Quantum Yield and High‐Efficiency X‐ray Scintillation

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 23, 2024

Designing and synthesizing multifunctional hybrid copper halides with near ultraviolet (NUV) light-excited high-energy emission (<500 nm) remains challenging. Here, a pair of broadband-excited emitting isomers, namely, α-/β-(MePh

Language: Английский

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Increasing the Structural Rigidity and Quantum Yield of Highly Emissive Hybrid Antimony Chlorides Using a Diverse Set of Solvent Guests

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(17)

Published: Feb. 10, 2024

Abstract 0D organic–inorganic antimony halides have attracted increasing attention due to the non‐toxicity, high stability, and superior photoluminescence quantum yield (PLQY). Here, a series of hybrid chlorides with same organic cation ethyltriphenylphosphonium (Ph 3 EtP + ), including non‐emissive EtP) 2 Sb Cl 8 nine SbCl 5 ‐based emissive compounds, are synthesized characterized. These compounds namely, guest‐free ·guest (guest = glycol, acetic acid, methanol, ethanol, n‐propanol, i‐propanol, acetone, acetonitrile). The solvent used can alter coordination mode because solvation effect affects reactivity anions ([SbCl 4 ] − leading formation either A or . solvents be even incorporated into crystal structure, where stronger interaction [SbCl 2− leads higher temperature escape solvent. guest molecules could increase structural rigidity via hydrogen bonding dipole–dipole interactions, which tends reduce room‐temperature (PL) Stokes shift temperature‐dependent PL by decreasing deformability, along enhanced PLQY from 81% in near‐unity ·glycol. This work shows that targeted synthesis diversified choices provide an efficient tool generate steady variations materials for optoelectronics.

Language: Английский

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Realizing efficient emission and triple‐mode photoluminescence switching in air‐stable tin(IV)‐based metal halides via antimony doping and rational structural modulation

Aggregate, Journal Year: 2023, Volume and Issue: 5(1)

Published: Aug. 24, 2023

Abstract Recently, many lead‐free metal halides with diverse structures and highly efficient emission have been reported. However, their poor stability single‐mode color severely limit applications. Herein, three homologous Sb 3+ ‐doped zero‐dimensional (0D) air‐stable Sn(IV)‐based different crystal were developed by inserting a single organic ligand into SnCl 4 lattice, which brings optical properties. Under photoexcitation, (C 25 H 22 P)SnCl 5 @Sb·CH O ( −1 ) does not emit light, P) 2 6 @Sb‐α −2α shines bright yellow photoluminescence quantum yield (PLQY) of 92%, @Sb‐β −2β exhibits intense red PLQY 78%. The above compounds show quite properties should be due to the lattice distortions. Particularly, can successfully converted under treatment C PCl solution, accompanied transition from nonemission emission, serving as “turn‐on” (PL) switching. Parallelly, reversible structure conversion between was witnessed after dichloromethane or volatilization treatment, Thereby, triple‐mode tunable PL switching off–on I –on II constructed in compounds. Finally, we demonstrated as‐synthesized fluorescent anticounterfeiting, information encryption, logic gates.

Language: Английский

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Regulating photoluminescence through single-crystal-to-single-crystal transformation of solvent-containing zero-dimensional hybrid metal halide isomers

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 151026 - 151026

Published: April 5, 2024

Language: Английский

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