Circularly Polarized Luminescence Induced by Hydrogen‐Bonding Networks in a One‐Dimensional Hybrid Manganese(II) Chloride

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(24)

Published: April 12, 2024

Abstract Chiral hybrid metal halides hold great potential as circularly polarized luminescence light sources. Herein, we have obtained two enantiomeric pairs of one‐dimensional chiral manganese(II) chloride single crystals, R / S ‐(3‐methyl piperidine)MnCl 3 ( ‐1) and ‐(3‐hydroxy ‐2), crystallizing in the non‐centrosymmetric space group P 2 1 . In comparison to ‐1, ‐2 crystals not only show red emission with near‐unity photoluminescence quantum yield (PLQY) high resistance thermal quenching but also exhibit an asymmetry factor g lum ) 2.5×10 −3 , which can be attributed enhanced crystal rigidity resulting from hydrogen bonding networks between piperidine) cations [MnCl 6 ] 4− chains. The activities originate asymmetric luminophores induced by N−H⋅⋅⋅Cl piperidine). Moreover, these samples demonstrate application light‐emitting diodes X‐ray scintillators. This work shows a highly efficient photoluminescent Mn‐based halide offers strategy for designing multifunctional halides.

Language: Английский

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Near-unity room-temperature phosphorescence quantum yield induced by halogen–halogen interaction in chiral hybrid copper(i) iodide clusters

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

Published: Jan. 1, 2025

In this study, two pairs of 0D chiral copper iodide clusters were synthesized. The structural rigidity is increased by halogen modulation to obtain a near unity PLQY. applications in white LED and X-ray imaging are extremely promising.

Language: Английский

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Balance Between Energy Migration and Thermal Quenching: Solid Solution Strategy to Highly Boost the Quantum Yield of Copper(I)‐Iodide Cluster

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

Published: April 21, 2025

Abstract Cu(I)‐iodide clusters have attracted broad attention due to their outstanding photoluminescence properties. However, commercial viability is often constrained by moderate quantum yields. In this work, a solid solution strategy employed synthesize heterometallic cluster 3·Cu/Ag , achieving nearly 18‐ and 10‐fold enhancements in yield (up 86.10%) relative the monometallic 1·Cu 2·Ag respectively. Detailed investigations reveal an unprecedented mechanism balancing energy migration thermal quenching, which underlies intense emission distinct thermochromic behavior of under both cryogenic ambient conditions. These findings highlight potential applications luminescent thermometer, multicolor displays, solid‐state lighting technologies.

Language: Английский

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Ordered assembly of templated chiral/achiral organic cations toward efficient circularly polarized emission in hybrid antimony chlorides

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

Published: April 3, 2025

Language: Английский

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Chiral Organic Cations and Distorted Inorganic Polyhedra Composing Metal Halide Nonlinear Optical Materials

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: June 5, 2024

Abstract Organic–inorganic metal halides (OIMHs) exhibit a rich structural diversity and excellent semiconductor properties, making them attractive candidates in the field of nonlinear optics (NLO). Second harmonic generation, as an important NLO property, imposes strict symmetry constraints, requiring noncentrosymmetric structures. Currently, key task is to design structures for OIMHs explore relationship between structure performance. This will help further optimize application materials. The can be facilitated by use chiral organic cations or distorted inorganic polyhedra, both which induce features that favor noncentrosymmetry. properties are summarized performance analyzed, research directions these materials elaborated.

Language: Английский

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Multiple Stimuli‐Responsive Luminescent Chiral Hybrid Antimony Chlorides for Anti‐Counterfeiting and Encryption Applications

Angewandte Chemie, Journal Year: 2023, Volume and Issue: 135(36)

Published: July 18, 2023

Abstract Stimuli‐responsive circularly polarized luminescence (CPL) materials are ideal for information anti‐countering applications, but the best‐performing have not yet been identified. This work presents enantiomorphic hybrid antimony halides R ‐(C 5 H 12 NO) 2 SbCl ( 1 ) and S showing mirror‐imaged CPL activity with a dissymmetry factor of 1.2×10 −3 . Interestingly, DMF‐induced structural transformation is realized to obtain non‐emissive ⋅ DMF 3 4 upon exposure vapor. The process reversed heating. DFT calculations showed that DMF‐induced‐quenched‐luminescence attributed intersection ground excited state curves on configuration coordinates. Unexpectedly, nanocrystals chiral were prepared indicate excellent solution performance. reversible PL switching gives system applications in technology, anti‐counterfeiting, encryption‐decryption, logic gates.

Language: Английский

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Circular dichroism and circularly polarized luminescence of ligand-protected molecular metal clusters: insights into structure–chiroptical property relationships

Nanoscale, Journal Year: 2024, Volume and Issue: 16(25), P. 11914 - 11927

Published: Jan. 1, 2024

Molecular noble metal clusters are an emerging class of circularly polarized luminescent (CPL) nanomaterials. Many the ligand-protected exhibit discrete electronic absorption bands, which assigned to their structural components such as core, ligands and metal-ligand interfaces. This implies suitability chiroptical spectroscopic approach unravel structure-chiroptical property relationships in molecular clusters. Due tremendous developments computational methods for investigating properties, along with circular dichroism (CD) CPL spectroscopy, understanding properties these is rapidly progressing. review discusses various strategies use chiral ligands, atom substitution, ligand exchange, co-crystallization etc., inducing enhancing demonstrates potential combined CD-CPL investigations theoretical calculations origins photoluminescence activity

Language: Английский

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Reversible Local Protonation‐Deprotonation: Tuning Stimuli‐Responsive Circularly Polarized Luminescence in Chiral Hybrid Zinc Halides for Anti‐Counterfeiting and Encryption

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(46)

Published: Aug. 13, 2024

Abstract Precise control over the organic composition is crucial for tailoring distinctive structures and properties of hybrid metal halides. However, this approach seldom utilized to develop materials that exhibit stimuli‐responsive circularly polarized luminescence (CPL). Herein, we present synthesis characterization enantiomeric zinc bromides: biprotonated (( R/S )‐C 12 H 16 N 2 )ZnBr 4 ‐LH2)ZnBr ) monoprotonated 15 ZnBr ‐LH1) ), derived from chiral amine ( )‐2,3,4,9‐Tetrahydro‐1H‐carbazol‐3‐amine 14 ). These compounds showcase luminescent properties; zero‐dimensional form emits green light at 505 nm, while form, with a pseudo‐layered structure, displays red 599 649 nm. Remarkably, reversible local protonation‐deprotonation behavior cations allows exposure polar solvents heating induce structural transformations between two forms. Theoretical calculations reveal lower energy barrier associated deprotonation process within pyrrole ring responsible observed. enantiomorphic bromides also switchable circular dichroism (CD) CPL properties. Furthermore, their chloride counterparts were successfully obtained by adjusting halogen ions. Importantly, unique characteristics position these halides as promising candidates applications in information storage, anti‐counterfeiting, encryption.

Language: Английский

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Chiral Rare-Earth (Ce, Eu) Metal Halides with Bright Circularly Polarized Luminescence

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(46), P. 21801 - 21805

Published: Nov. 6, 2024

Chiral metal halide materials are emerging chiroptical that easy to synthesize and have a wide tunability. Rare-earth (RE) metals desirable components be incorporated in the hybrid regime; however, they typically difficult handle for solution-based chemistry. Here, we report two new examples of chiral RE halides with Ce(III) Eu(III) alkanolammonium cations (R/S-3-hydroxyquinuclidium). These compounds crystallize non-centrosymmetric space group R3, where their mirror-like symmetric circular dichroism (CD) circularly polarized luminescence (CPL) further witness nature. The superior emission properties, including high photoluminescence quantum yield Ce-based (84–90%) Eu-based (27–29%), led distinct sharp symmetrical CPL ultraviolet visible regions, dissymmetry factors (glum) ∼2 × 10–3 ∼4 10–3, respectively. This work has established expanded demonstrated potential spintronic applications.

Language: Английский

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CPL-active hybrid copper(I) halides enabled by cation inclusion with chiral crown-ether

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(10), P. 3283 - 3290

Published: Aug. 22, 2024

Language: Английский

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