Direct observation of chirality-induced spin selectivity in electron donor–acceptor molecules

Science, Год журнала: 2023, Номер 382(6667), С. 197 - 201

Опубликована: Окт. 12, 2023

The role of chirality in determining the spin dynamics photoinduced electron transfer donor-acceptor molecules remains an open question. Although chirality-induced selectivity (CISS) has been demonstrated bound to substrates, experimental information about whether this process influences themselves is lacking. Here we used time-resolved paramagnetic resonance spectroscopy show that CISS strongly isolated covalent donor-chiral bridge-acceptor (D-Bχ-A) which selective photoexcitation D followed by two rapid, sequential electron-transfer events yield D•+-Bχ-A•-. Exploiting phenomenon affords possibility using chiral molecular building blocks control states quantum applications.

Язык: Английский

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Optical Phenomena in Molecule-Based Magnetic Materials

Chemical Reviews, Год журнала: 2024, Номер 124(9), С. 5930 - 6050

Опубликована: Апрель 30, 2024

Since the last century, we have witnessed development of molecular magnetism which deals with magnetic materials based on species, i.e., organic radicals and metal complexes. Among them, broadest attention was devoted to molecule-based ferro-/ferrimagnets, spin transition materials, including those exploring electron transfer, nanomagnets, such as single-molecule magnets (SMMs), qubits, stimuli-responsive materials. Their physical properties open application horizons in sensors, data storage, spintronics, quantum computation. It found that various optical phenomena, thermochromism, photoswitching characteristics, luminescence, nonlinear chiroptical effects, well responsivity external stimuli, can be implemented into Moreover, fruitful interactions these effects provide new cross-effects multifunctionality, enriching applications optical, electronic, devices. This Review aims show scope phenomena generated recent advances areas high-temperature photomagnetism, thermometry utilizing SMMs, addressability magneto-chiral dichroism, opto-magneto-electric multifunctionality. These findings are discussed context types accessible for classes

Язык: Английский

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Molecular nanomagnets: a viable path toward quantum information processing?

Reports on Progress in Physics, Год журнала: 2024, Номер 87(3), С. 034501 - 034501

Опубликована: Фев. 5, 2024

Abstract Molecular nanomagnets (MNMs), molecules containing interacting spins, have been a playground for quantum mechanics. They are characterized by many accessible low-energy levels that can be exploited to store and process information. This naturally opens the possibility of using them as qudits, thus enlarging tools logic with respect qubit-based architectures. These additional degrees freedom recently prompted proposal encoding qubits embedded error correction (QEC) in single molecules. QEC is holy grail computing this qudit approach could circumvent large overhead physical typical standard multi-qubit codes. Another important strength molecular extremely high degree control achieved preparing complex supramolecular structures where individual qudits linked preserving their properties coherence. particularly relevant building simulators, controllable systems able mimic dynamics other objects. The use MNMs information processing rapidly evolving field which still requires fully experimentally explored. key issues settled related scaling up number qudits/qubits addressing. Several promising possibilities being intensively explored, ranging from single-molecule transistors or superconducting devices optical readout techniques. Moreover, new chemistry also at hand, like chiral-induced spin selectivity. In paper, we will review present status interdisciplinary research field, discuss open challenges envisioned solution paths finally unleash very potential spins technologies.

Язык: Английский

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Spintronic Phenomena and Applications in Hybrid Organic–Inorganic Perovskites

Advanced Functional Materials, Год журнала: 2024, Номер 34(27)

Опубликована: Март 1, 2024

Abstract The spin degree of freedom in hybrid organic–inorganic perovskites (HOIPs) has become a rapidly growing research topic both HOIPs and spintronics fields due to its fundamental scientific significance tight relevance with optoelectronics. flourishing achievements HOIP call for timely review summarize the key progress guide future developments. In this review, classical spintronic phenomena based on spin‐orbit coupling (SOC) are discussed, especially Rashba splitting related applications such as spin‐charge conversion. Owing unique chirality‐spin coupling, chiral particularly focused on, including chirality‐induced selectivity (CISS). Based complex band structure carrier/exciton, dynamics is also widely investigated constitutes an indispensable part spintronics. Aside from three main threads, other magneto‐optical device exploration involved promising opportunities. Despite continuous breakthroughs spintronics, more efforts required expand material systems, explore new physics, optimize configurations enhanced performance high integration. A deep understanding behaviors will create platform beyond conventional optoelectronic photovoltaic applications.

Язык: Английский

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Covalent Organic Frameworks with Tunable Chirality for Chiral-Induced Spin Selectivity

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(10), С. 6733 - 6743

Опубликована: Фев. 28, 2024

Chiral covalent organic frameworks (CCOFs) have attracted extensive interest for their potential applications in various enantioselective processes. However, the exploitation of chirality-induced spin selectivity (CISS) that enables a new technology injection polarized current without need permanent magnetic layer within CCOFs remains largely untapped area research. Here, we demonstrate that, first time, COFs can be an attractive platform to develop filter materials with efficient CISS. This facilitates design and synthesis family Zn(salen)-based 2D CCOFs, namely, CCOFs-9–12, by imine condensation chiral 1,2-diaminocyclohexane tri- or tetra(salicylaldehyde) derivatives. CCOF-9, distinguished its unique C2 symmetric "armchair" tetrasubstituted pyrene conformation, exhibits most pronounced chirality among these serves as solid-state host, enabling adsorption racemic drugs enantiomeric excess (ee) up 97%. After substituting diamagnetic zinc(II) ions paramagnetic cobalt(II), resulting CCOF-9-Co not only retains high crystallinity, porosity, exceptional but also enhanced conductivity, crucial factor effective observation Magnetic conductive atomic force microscopy showed exhibited remarkable CISS effect 88–94% polarization ratio. phenomenon is further confirmed increased intensity circular dichroism (MCD) when under external field. work therefore shows tremendous controlling will stimulate creation types crystalline polymers strong effects filters.

Язык: Английский

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Spin Polarization in Transport Studies of Chirality-Induced Spin Selectivity

ACS Nano, Год журнала: 2023, Номер 17(20), С. 19502 - 19507

Опубликована: Окт. 4, 2023

Chirality-induced spin selectivity (CISS) is a recently discovered effect in which structural chirality can result different conductivities for electrons with opposite spins. In the CISS community, degree of polarization commonly used to describe efficiency filtering/polarizing process, as it represents fraction spins aligned along chiral axis materials originating from non-spin-polarized currents. However, methods defining, calculating, and analyzing have been inconsistent across various studies, hindering advances this field. Perspective, we connect relevant background definition polarization, discuss its calculation contexts CISS, propose practical meaningful figure merit by quantitative analysis magnetoresistance transport studies.

Язык: Английский

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Structural Chirality and Electronic Chirality in Quantum Materials

Annual Review of Materials Research, Год журнала: 2024, Номер 54(1), С. 97 - 115

Опубликована: Апрель 22, 2024

In chemistry and biochemistry, chirality represents the structural asymmetry characterized by nonsuperimposable mirror images for a material such as DNA. physics, however, commonly refers to spin–momentum locking of particle or quasiparticle in momentum space. While seemingly disconnected, molecules crystals can drive electronic through orbital–momentum locking; that is, be transferred from atomic geometry orbitals. Electronic provides an insightful understanding chirality-induced spin selectivity, which electrons exhibit salient polarization after going chiral material, electrical magnetochiral anisotropy, is diode-like transport. It further gives rise new phenomena, anomalous circularly polarized light emission, handedness relies on emission direction. These chirality-driven effects will generate broad impacts fundamental science technology applications spintronics, optoelectronics, biochemistry.

Язык: Английский

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Inverse chirality-induced spin selectivity effect in chiral assemblies of π-conjugated polymers

Nature Materials, Год журнала: 2024, Номер 23(6), С. 782 - 789

Опубликована: Март 15, 2024

Язык: Английский

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Stable organic radical qubits and their applications in quantum information science

The Innovation, Год журнала: 2024, Номер 5(5), С. 100662 - 100662

Опубликована: Июнь 21, 2024

The past century has witnessed the flourishing of organic radical chemistry. Stable radicals are highly valuable for quantum technologies thanks to their inherent room temperature coherence, atomic-level designability, and fine tunability. In this comprehensive review, we highlight potential stable as high-temperature qubits explore applications in information science, which remain largely underexplored. Firstly, summarize known spin dynamic properties examine factors that influence electron relaxation decoherence times. This examination reveals design principles optimal operating conditions. We further discuss integration solid-state materials surface structures, present state-of-the-art computing, memory, sensing. Finally, analyze primary challenges associated with provide tentative insights future research directions.

Язык: Английский

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Chiral nanostructured Pd films for efficient electrocatalytic reduction of nitrite to ammonia

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162647 - 162647

Опубликована: Апрель 1, 2025

Язык: Английский

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