Chiral Induced Spin Selectivity

Chemical Reviews, Год журнала: 2024, Номер 124(4), С. 1950 - 1991

Опубликована: Фев. 16, 2024

Since the initial landmark study on chiral induced spin selectivity (CISS) effect in 1999, considerable experimental and theoretical efforts have been made to understand physical underpinnings mechanistic features of this interesting phenomenon. As first formulated, CISS refers innate ability materials act as filters for electron transport; however, more recent experiments demonstrate that displacement currents arising from charge polarization molecules lead without need net flow. With its identification a fundamental connection between symmetry materials, promises profound ubiquitous implications existing technologies new approaches answering age old questions, such homochiral nature life. This review begins with discussion different methods measuring then provides comprehensive overview known exhibit CISS-based phenomena before proceeding identify structure-property relations delineate leading models effect. Next, it identifies some physics, chemistry, biology. The ends critical assessment field comments future outlook.

Язык: Английский

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Chiral Rashba Ferroelectrics for Circularly Polarized Light Detection

Advanced Materials, Год журнала: 2022, Номер 34(51)

Опубликована: Сен. 21, 2022

Direct detection of circularly polarized light (CPL) is a challenging task due to limited materials and ambiguous structure-property relationships that lead low distinguishability the helicities. Perovskite ferroelectric semiconductors incorporating chirality provide new opportunities in dealing with this issue. Herein, pair 2D chiral perovskite ferroelectrics reported, which have enhanced CPL performance interplays among lattice, photon, charge, spin, orbit. The chirality-transfer-induced chiral&polar phase enhances asymmetric nature photoactive sublattice achieves switchable self-powered via bulk photovoltaic effect. single-crystal-based device exhibits CPL-sensitive under 430 nm an factor 0.20 for left- right-CPL differentiation, about two times pure counterparts. ascribed Rashba-Dresselhaus effect originates from inversion asymmetry strong spin-orbit coupling, shown large Rashba coefficient, demonstrated by density functional theory calculation excited photoluminescence measurement. These results perspectives on direct ferroelectrics-based chiroptics spintronics.

Язык: Английский

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High Responsivity Circular Polarized Light Detectors based on Quasi Two-Dimensional Chiral Perovskite Films

ACS Nano, Год журнала: 2022, Номер 16(2), С. 2682 - 2689

Опубликована: Фев. 2, 2022

Circularly polarized light (CPL) has considerable technological potential, from quantum computing to bioimaging. To maximize the opportunity, high performance photodetectors that can directly distinguish left-handed and right-handed circularly are needed. Hybrid organic-inorganic perovskites containing chiral organic ligands an emerging candidate for active material in CPL photodetecting devices, but current studies suggest there be a trade-off between ability differentially absorb photocurrent responsivity devices. Here, we report detector based on quasi two-dimensional (quasi-2D) perovskite films. We find it is possible generate materials where circular dichroism (CD) comparable both 2D quasi-2D films, while of photodetector improves latter. Given this, able showcase exhibits dissymmetry factor 0.15 15.7 A W-1. believe our data further advocates potential CPL-dependent photonic technologies.

Язык: Английский

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Multifunctional Chiral 2D Lead Halide Perovskites with Circularly Polarized Photoluminescence and Piezoelectric Energy Harvesting Properties

ACS Nano, Год журнала: 2022, Номер 16(2), С. 3221 - 3230

Опубликована: Фев. 10, 2022

Introducing the chiral spacers to two-dimensional (2D) lead halide perovskites (LHPs) enables them exhibit circularly polarized photoluminescence (CPPL), which could have applications in chiral-optics and spintronics. Despite that a great deal of effort has been made this field, reported polarization degree CPPL at ambient conditions is still very limited, integration multiple functionalities also remains be explored. Here we report structures, CPPL, piezoelectric energy harvesting properties 2D LHPs, [R-1-(4-bromophenyl)ethylaminium]2PbI4 (R-[BPEA]2PbI4) [S-1-(4-bromophenyl)ethylaminium]2PbI4 (S-[BPEA]2PbI4). Our results show these are direct bandgap semiconductors centered ∼513 nm with maximum up 11.0% room temperature. In addition, unique configurational arrangement found able reduce interlayer π-π interactions consequently result strong electron-phonon coupling. Furthermore, intrinsic chirality both R-[BPEA]2PbI4 S-[BPEA]2PbI4 active, their composite films can applied generate voltages currents ∼0.6 V ∼1.5 μA under periodic impacting strength 2 N, respectively. This work not only reports high but demonstrates behavior for realizing multifunctionalities LHPs.

Язык: Английский

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Regulating Optical Activity and Anisotropic Second-Harmonic Generation in Zero-Dimensional Hybrid Copper Halides

Nano Letters, Год журнала: 2022, Номер 22(2), С. 846 - 852

Опубликована: Янв. 13, 2022

Structural engineering permits the introduction of chirality into organic–inorganic hybrid metal halides (HMHs), which creates a promising and exclusive material for applications in various optoelectronics. However, optical activity regulation chiral HMHs remains largely unexplored. In this work, we have synthesized two pairs lead-free with zero-dimensional tetrahedral arrangement, i.e., (R- S-1-(1-naphthyl)ethylammonium)2CuCl4 S-1-(2-naphthyl)ethylammonium)2CuCl4. The magnitude these can be efficiently modulated as result different magnetic transition dipole moments. Furthermore, exhibited effective second-harmonic generation (SHG) distinct SHG-circular dichroism (CD), (R-1-(1-naphthyl)ethylammonium)2CuCl4 having an anisotropy factor (gSHG-CD) up to 0.41. This work not only provides insights regulating anisotropic SHG effect but also confirms feasibility SHG-CD spectroscopy tool characterizing intrinsic materials.

Язык: Английский

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Circularly Polarized Light Responsive Materials: Design Strategies and Applications

Advanced Materials, Год журнала: 2023, Номер 35(49)

Опубликована: Март 19, 2023

Abstract Circularly polarized light (CPL) with the end of optical vector traveling along circumferential trajectory shows left‐ and right‐handedness, which transmits chiral information to materials via complicated CPL–matter interactions. Materials circular dichroism respond CPL illumination selectively differential outputs that can be used design novel photodetectors. Racemic or achiral compounds under go through photodestruction, photoresolution, asymmetric synthesis pathways generate enantiomeric bias activity. By this strategy, helical polymers inorganic plasmonic nanostructures are synthesized directly, their intramolecular folding subsequent self‐assembly photomodulable as well. In aggregated state liquid crystal phase, sense dynamic molecular packing is sensitive brought by CPL, enabling amplification supramolecular scale. review, application‐guided strategies CPL‐responsive aimed systematically summarized discussed. Asymmetric synthesis, resolution, property‐modulation small organic compounds, polymers, nanoparticles, assemblies crystals highlighted based on important developments during last decades. Besides, applications light–matter interactions including detection biomedical also referred.

Язык: Английский

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

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(36)

Опубликована: Июль 18, 2023

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-(C5 H12 NO)2 SbCl5 (1) and S-(C5 (2) 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 1 2 were prepared indicate excellent solution performance. reversible PL switching gives system applications in technology, anti-counterfeiting, encryption-decryption, logic gates.

Язык: Английский

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Nucleation-mediated growth of chiral 3D organic–inorganic perovskite single crystals

Nature Chemistry, Год журнала: 2023, Номер 15(11), С. 1581 - 1590

Опубликована: Авг. 7, 2023

Язык: Английский

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Chiral Hybrid Germanium(II) Halide with Strong Nonlinear Chiroptical Properties

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(41)

Опубликована: Авг. 23, 2023

Due to the pronounced anisotropic response circularly polarized light, chiral hybrid organic-inorganic metal halides have been regarded as promising candidates for application in nonlinear chiroptics, especially second-harmonic generation circular dichroism (SHG-CD) effect. However, designing novel lead-free with large anisotropy factors and high laser-induced damage thresholds (LDT) of SHG-CD remains challenging. Herein, we develop first germanium halide, (R/S-NEA)3 Ge2 I7 ⋅H2 O (R/S-NGI), systematically investigated its linear chiroptical properties. S-NGI R-NGI exhibit (gSHG-CD ) 0.45 0.48, respectively, along a LDT 38.46 GW/cm2 ; these were highest values among reported halides. Moreover, effective second-order optical coefficient could reach up 0.86 pm/V, which was 2.9 times higher than that commercial Y-cut quartz. Our findings facilitate new avenue toward halides, their implementation applications.

Язык: Английский

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The first chiral cerium halide towards circularly-polarized luminescence in the UV region

Science China Chemistry, Год журнала: 2024, Номер 67(6), С. 1961 - 1968

Опубликована: Фев. 7, 2024

Язык: Английский

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