Spin-dependent charge transfer at chiral electrodes probed by magnetic resonance

Blumenschein, Felix; Tamski, Mika; Roussel, Christophe; Smolinsky, Eilam Z. B.; Tassinari, Francesco; Naaman, Ron; Ansermet, Jean-Philippe

doi:10.1039/c9cp04681j

Cited by 15 publications

(17 citation statements)

References 45 publications

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“…large classes of molecular systems, including Bacteriorhodopsin, 5 various oligopeptides, [6][7][8][9][10][11][12] DNA, 13 DNA-wrapped carbon nanotubes, 14 helicenes, 15,16 and supramolecular nanofibers. 17 Further, additional CISS-related effects have been shown, including magnetization switching induced by helical molecular films 18 as well as its relevance for the electrochemical water splitting process, 19 and for short-range intermolecular interactions in biosystems.…”

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confidence: 99%

Role of Exchange Interactions in the Magnetic Response and Intermolecular Recognition of Chiral Molecules

et al. 2020

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The physical origin of so called Chirality-Induced Spin Selectivity (CISS) effect has puzzled experimental and theoretical researchers over the past few years. Early experiments were interpreted in terms of unconventional spin-orbit interactions mediated by the helical geometry. However, more recent experimental studies have clearly revealed that electronic exchange interactions also play a key role in the magnetic response of chiral molecules in singlet states. In this investigation, we use spin polarized closed-shell Density-Functional Theory calculations to address the influence of exchange contributions to the interaction between helical molecules as well as of helical molecules with magnetized substrates. We show that exchange effects result in differences in the interaction properties with magnetized surfaces, shedding light into the possible origin of two recent important experimental results: enantiomer separation and Magnetic Exchange Force Microscopy with AFM tips functionalized with helical peptides.

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confidence: 99%

Role of Exchange Interactions in the Magnetic Response and Intermolecular Recognition of Chiral Molecules

et al. 2020

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“…The working electrode would have to be optimized so that it does not introduce any field inhomogeneity. The application of the Chirality-Induced Spin Selectivity (CISS) effect 43 should also be explored as a method for hyperpolarising the electron spins, as it may greatly simplify the method to achieve OE at high fields.…”

Section: Resultsmentioning

confidence: 99%

“…100 mM concentration of MV + in a two compartment u-cell at a Pt electrode. 43 For the electrochemical Overhauser experiments, the sample solutions contained 50 mM of MV 2+ and 50 mM of TBAHP dissolved into a 20 : 80 MeOH : ACN (w/w) mixture, in which the solubility of MV 2+ is high. All of the samples were prepared and stored in a glove box with dry nitrogen atmosphere, and taken out only in sealed test tubes for measurements.…”

Section: Ec-oe-dnp Samplementioning

confidence: 99%

Electrochemical Overhauser dynamic nuclear polarization

Tamski

Milani

Roussel

et al. 2020

Phys. Chem. Chem. Phys.

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“…Due to their unique unpaired electron structure [ 16 ], stable organic radicals possess fascinating optical, electronic, and magnetic properties. Additionally, as a result, they have been widely used in the fields of polarization optics [ 17 , 18 , 19 , 20 ], organic optoelectronics [ 21 , 22 , 23 , 24 ], spintronics [ 25 , 26 , 27 , 28 ], and molecular magnetism [ 29 , 30 , 31 , 32 ]. However, in most cases, organic radicals have difficulty remaining stable under ambient conditions.…”

Section: Introductionmentioning

confidence: 99%

Research Progress on Triarylmethyl Radical-Based High-Efficiency OLED

Luo

Rong

et al. 2022

Molecules

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Perchlorotrityl radical (PTM), tris (2,4,6-trichlorophenyl) methyl radical (TTM), (3,5-dichloro-4-pyridyl) bis (2,4,6 trichlorophenyl) methyl radical (PyBTM), (N-carbazolyl) bis (2,4,6-trichlorophenyl) methyl radical (CzBTM), and their derivatives are stable organic radicals that exhibit light emissions at room temperature. Since these triarylmethyl radicals have an unpaired electron, their electron spins at the lowest excited state and ground state are both doublets, and the transition from the lowest excited state to the ground state does not pose the problem of a spin-forbidden reaction. When used as OLED layers, these triarylmethyl radicals exhibit unique light-emitting properties, which can increase the theoretical upper limit of the OLED’s internal quantum efficiency (IQE) to 100%. In recent years, research on the luminescent properties of triarylmethyl radicals has attracted increasing attention. In this review, recent developments in these triarylmethyl radicals and their derivatives in OLED devices are introduced.

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Spin-dependent charge transfer at chiral electrodes probed by magnetic resonance

Abstract: Chirality-induced spin polarization at chiral electrodes probed by magnetic resonance.

Cited by 15 publications

References 45 publications

Role of Exchange Interactions in the Magnetic Response and Intermolecular Recognition of Chiral Molecules

Role of Exchange Interactions in the Magnetic Response and Intermolecular Recognition of Chiral Molecules

Electrochemical Overhauser dynamic nuclear polarization

Research Progress on Triarylmethyl Radical-Based High-Efficiency OLED

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