Multi-stimuli-responsive luminescence enabled by crown ether anchored chiral antimony halide phosphors

Chemical Science, Journal Year: 2024, Volume and Issue: 15(10), P. 3530 - 3538

Published: Jan. 1, 2024

The chirality-dependent lattice distortion assisted by a crown ether leads to an intense STEs emission along with CPL. distinct endows the Sb halides multi-stimuli-responsive PL behaviours towards excitation wavelength and temperature.

Language: Английский

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Tuning ferroelectric phase transition temperature by enantiomer fraction

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

Published: Feb. 17, 2024

Abstract Tuning phase transition temperature is one of the central issues in materials. Herein, we report a case study using enantiomer fraction engineering as promising strategy to tune Curie ( T C ) and related properties ferroelectrics. A series metal-halide perovskite ferroelectrics S −3AMP) x R 1−x PbBr 4 was synthesized where 3AMP 3-(aminomethyl)piperidine divalent cation varies between 0 1 (0 = enantiomers; 0.5 racemate). With change fraction, , second-harmonic generation intensity, degree circular polarization photoluminescence, photoluminescence intensity materials have been tuned. Particularly, when 0.70 − 1, continuously linear tuning achieved, showing tunable range about 73 K. This provides an effective means insights for regulating chiroptical functional

Language: Английский

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Magneto‐chiral Nonlinear Optical Effect with Large Anisotropic Response in Two‐Dimensional Halide Perovskite

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: March 28, 2024

Abstract The chiral organic–inorganic halide perovskites (OIHPs) are vital candidates for superior nonlinear optical (NLO) effects associated with circularly polarized (CP) light. NLO in materials often couples magnetic dipole (MD) transition, as well the conventional electric (ED) transition. However, importance of MD transition process OIHPs has not yet been recognized. Here, circular probe analysis second harmonic generation dichroism (SHG‐CD) provides direct evidence that contribution leads to a large anisotropic response CP lights OIHPs, (R‐/S‐MBACl) 2 PbI 4 . thin films exhibit great sensitivity over wide wavelength range, and g‐value reaches up 1.57 at where is maximized. Furthermore, it also effective light generator, outputting CP‐SHG maximum g‐factor 1.76 upon stimulation linearly This study deepens understanding relation between chirality magneto‐optical effect, such an efficient discrimination signal highly applicable chirality‐based sensor communication devices.

Language: Английский

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Dramatical enhancement of circular dichroism in chiral hybrid perovskites via carboxylic hydrogen bond engineering

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

Published: Jan. 13, 2025

Language: Английский

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Spontaneous polarization halide perovskite piezo-photocatalysis for highly efficient photocatalytic hydrogen evolution

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Precise Design of Molecular Ferroelectrics with High T_C and Tunable Band Gap by Molecular Modification

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(30), P. 12018 - 12026

Published: July 18, 2023

Molecular ferroelectric materials are widely applied in piezoelectric converters, non-volatile memorizers, and photovoltaic devices due to their advantages of adjustable structure, lightweight, easy processing, environmental friendliness. However, designing multifunctional molecular ferroelectrics with excellent properties has always been a great challenge. Herein, multiaxial is successfully designed by modifying the quasi-spherical cation dabco CuBr2 obtain halogenated [Bretdabco]CuBr4 (Bretdabco = N-bromoethyl-N'-diazabicyclo [2.2.2]octane), which crystallizes polar point groups (C6). Typical behaviors featured P-E hysteresis loop switched domain exhibited. Notably, shows high TC 460 K, rare field could greatly expand application range this material. In addition, band gap through regulation halogen. Both UV absorption spectra theoretical calculations indicate that belong direct (2.14 eV) semiconductor. This tunable narrow semiconductor material can be utilized more effectively study optoelectronics sensors, including energy harvesters. research may provide promising approach for development tiny TC.

Language: Английский

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Room-Temperature Anisotropic Actuation Driven by a Synergistic Order–Disorder and Displacive Phase Transition in a Ferroelectric Crystal

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(9), P. 6336 - 6344

Published: Feb. 21, 2024

Actuating materials convert different forms of energy into mechanical responses. To satisfy various application scenarios, they are desired to have rich categories, novel functionalities, clear structure-property relationships, fast responses, and, in particular, giant and reversible shape changes. Herein, we report a phase transition-driven ferroelectric crystal, (

Language: Английский

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Chirality Triggered Biferroicity in a 3D Rubidium Based Perovskite

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(28)

Published: March 10, 2024

Abstract Multiferroics refer to materials with two or more ferroic orders in one phase within a specific temperature range, including ferroelectricity, ferroelasticity, and ferromagnetism which have been widely used sensors, actuators, memory devices. Among them, hybrid perovskites exhibiting multiferroicity are generally limited low dimensions (0D–2D). Designing 3D lead‐free perovskite multiferroics remains challenge due Goldschmidt's tolerance factor limitation. Here, multiferroic ( R ‐3AP)RbBr 3 1 ; 3AP = 3‐ammoniopyrrolidinium) is successfully synthesized by introducing homochirality the ferroelectric Rac , achieving both ferroelasticity ferroelectricity. Compound undergoes structure transition at 401 K belonging Aizu notation 432F2( s ), has 12 equivalent polarization directions 6 polar axes. Furthermore, exhibits reversible second harmonic generation switching effects. Moreover, while varies, rapid changes of ferroelastic domains observed using polarizing microscope, indicating that it material. This work provides practical method for designing synthesizing molecule‐based multiferroics.

Language: Английский

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Homochirality to design high-T_c lead-free ferroelastic semiconductors

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(17), P. 6098 - 6105

Published: Jan. 1, 2024

High- T c lead-free ferroelastic semiconductor ( R / S -CTA) 2 SbCl 5 was obtained through an H/OH-substitution-induced homochirality strategy, and undergoes phase transition at 410 K accompanied by switching between the SHG-active SHG-inactive states.

Language: Английский

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Pyro‐Phototronic Effect Induced Circularly Polarized Light Detection with a Broadband Response

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 23, 2024

Photopyroelectric-based circularly polarized light (CPL) detection, coupling the pyro-phototronic effect and chiroptical phenomena, has provided a promising platform for high-performance CPL detectors. However, as novel detection strategy, photopyroelectric-based is currently restricted by short-wave optical response, underscoring urgent need to extend its response range. Herein, visible-to-near-infrared induced first realized in chiral-polar perovskites. Specifically, multilayered perovskites (S-BPEA)

Language: Английский

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