Enantiomer Adsorption in an Applied Magnetic Field: D‐ and L‐Aspartic Acid on Ni(100)

Radetic, Michael; Gellman, Andrew J.

doi:10.1002/ijch.202200028

Cited by 4 publications

(5 citation statements)

References 38 publications

(96 reference statements)

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“…19 It is important to note that CISS is often a transient process, 23,24 particularly as it pertains to enantiospecific interactions or measurements affected by decoherence, vide inf ra; therefore, measurement time scales are important for revealing spin selectivity. 25,26 Below we summarize different measurement techniques that have been used to probe the CISS effect in chiral molecules and chiral materials.…”

Section: Methods For Measuring Cissmentioning

confidence: 99%

“…In addition to direct measurements, indirect probes for the CISS effect rely on the spin-selectivity of product formation in electrochemical reactions, or of charge polarization-induced spin polarization, and the complementary phenomenon of spin polarization-induced charge polarization, of chiral molecules and materials. , In the latter case CISS has been shown to give rise to enantiospecific interactions, be they intermolecular or with ferromagnetic substrates, , as well as spin-dependent charge delocalization . It is important to note that CISS is often a transient process, , particularly as it pertains to enantiospecific interactions or measurements affected by decoherence, vide infra ; therefore, measurement time scales are important for revealing spin selectivity. , Below we summarize different measurement techniques that have been used to probe the CISS effect in chiral molecules and chiral materials.…”

Section: Methods For Measuring Cissmentioning

confidence: 99%

See 1 more Smart Citation

Chiral Induced Spin Selectivity

Bloom,

Paltiel,

Naaman

et al. 2024

Chem. Rev.

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

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Section: Methods For Measuring Cissmentioning

confidence: 99%

Section: Methods For Measuring Cissmentioning

confidence: 99%

Chiral Induced Spin Selectivity

Bloom,

Paltiel,

Naaman

et al. 2024

Chem. Rev.

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“…These studies indicate that the enantiopreference is sensitive to the interaction conditions between the molecule and substrate and imply that they can vary on a molecule-to-molecule basis. That being said, not all studies have shown enantiospecific adsorption on ferromagnetic surfaces; Radetic and Gellman 19 did not observe an enantiopreference in the adsorption of d - and l -aspartic acid on magnetized Ni(100) surfaces under ultra-high vacuum conditions. To fully exploit spin-mediated enantiospecificity for guiding chemical reactions, separations, and other processes, a more rigorous understanding of the physical properties which dictate enantioselectivity must be made.…”

Section: Introductionmentioning

confidence: 93%

Spin-Based Chiral Separations and the Importance of Molecule–Solvent Interactions

Qiu

Bloom

et al. 2023

J. Phys. Chem. C

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This work uses magneto-electrochemical quartz crystal microbalance methods to study the enantiospecific adsorption of chiral molecules onto a ferromagnetic substrate. The effects of solution conditions, pH, and solvent isotope composition indicate that the kinetics of the enantiomeric adsorption depend strongly on the charge state and geometry of the adsorbate, whereas no thermodynamic contributions to enantiospecificity are found. Density functional theory calculations reveal that an interplay between the adsorbate and solvent molecules is important for defining the observed enantiospecific preference with an applied magnetic field; however, it remains unclear if intermolecular vibrational couplings contribute to the phenomenon.

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“…In recent studies of chiral molecules on ferromagnetic Ni(100), neither enantiomeric separation nor differences in adsorption kinetics between magnetic domains were observed. [24,25] Here, we report enantiospecific adsorption of heptahelicene, a chiral helical polyaromatic molecule, on ferromagnetic singlecrystal cobalt surfaces in ultrahigh vacuum by means of spinpolarized scanning tunneling microscopy (SP-STM). Lateral enantioselection onto domains of opposite out-of-plane magnetization occurs in a transient physisorbed precursor state before final chemisorption.…”

Section: Introductionmentioning

confidence: 99%

“…In recent studies of chiral molecules on ferromagnetic Ni(100), neither enantiomeric separation nor differences in adsorption kinetics between magnetic domains were observed. [ 24,25 ]…”

Section: Introductionmentioning

confidence: 99%

Enantioselective Adsorption on Magnetic Surfaces

Safari,

Matthes,

Caciuc

et al. 2024

Advanced Materials

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From the beginning of molecular theory, the interplay of chirality and magnetism has intrigued scientists. There is still the question if enantiospecific adsorption of chiral molecules occurs on magnetic surfaces. Enantiomer discrimination was conjectured to arise from chirality‐induced spin separation within the molecules and exchange interaction with the substrate's magnetization. Here we show that single helical aromatic hydrocarbons undergo enantioselective adsorption on ferromagnetic cobalt surfaces. Spin and chirality sensitive scanning tunneling microscopy reveals that molecules of opposite handedness prefer adsorption onto cobalt islands with opposite out‐of‐plane magnetization. As mobility ceases in the final chemisorbed state, it is concluded that enantioselection must occur in a physisorbed transient precursor state. State‐of‐the‐art spin‐resolved ab initio simulations support this scenario by refuting enantio‐dependent chemisorption energies. These findings demonstrate that van der Waals interaction should also include spin‐fluctuations which are crucial for molecular magnetochiral processes.This article is protected by copyright. All rights reserved

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Enantiomer Adsorption in an Applied Magnetic Field: D‐ and L‐Aspartic Acid on Ni(100)

Cited by 4 publications

References 38 publications

Chiral Induced Spin Selectivity

Chiral Induced Spin Selectivity

Spin-Based Chiral Separations and the Importance of Molecule–Solvent Interactions

Enantioselective Adsorption on Magnetic Surfaces

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