Magnetic Field and Temperature Dependencies Shed Light on the Recombination Kinetics of a Transition Metal Donor/Acceptor System

Feilitzsch, Till von; Härter, Peter; Schiemann, Olav; Michel‐Beyerle, M. E.; Steiner, Ulrich; Gilch, Peter

doi:10.1021/ja0547174

Cited by 6 publications

(3 citation statements)

References 39 publications

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“…In the case of semiconductor, where the 2TM model (electron and lattice temperatures) has been effectively applied, the modification of G el by pump fluence has been reported 35 – 37 . The field-dependent lattice–spin and electron–spin interaction have recently been reported for molecules composed of transition metals 38 , 39 . The modified G ls should modify the temperatures of the spin and lattice.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast giant magnetic cooling effect in ferromagnetic Co/Pt multilayers

et al. 2017

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The magnetic cooling effect originates from a large change in entropy by the forced magnetization alignment, which has long been considered to be utilized as an alternative environment-friendly cooling technology compared to conventional refrigeration. However, an ultimate timescale of the magnetic cooling effect has never been studied yet. Here, we report that a giant magnetic cooling (up to 200 K) phenomenon exists in the Co/Pt nano-multilayers on a femtosecond timescale during the photoinduced demagnetization and remagnetization, where the disordered spins are more rapidly aligned, and thus magnetically cooled, by the external magnetic field via the lattice-spin interaction in the multilayer system. These findings were obtained by the extensive analysis of time-resolved magneto-optical responses with systematic variation of laser fluence as well as external field strength and direction. Ultrafast giant magnetic cooling observed in the present study can enable a new avenue to the realization of ultrafast magnetic devices.

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Section: Resultsmentioning

confidence: 99%

Ultrafast giant magnetic cooling effect in ferromagnetic Co/Pt multilayers

et al. 2017

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“…[17] In chemical reactions, the formation of various reactive oxygen species (ROS), such as singlet oxygen, hydroxyl radicals, and superoxide radicals, influences catalytic activity. Gilch et al [18] studied the electron transfer kinetics involved in free radical reactions using femtosecond spectroscopy, and found that magnetic fields can effectively influence electron transfer between free radicals. Therefore, the effect of magnetic fields on the rate of free radical generation is an important factor.…”

Section: Radical Pair Theorymentioning

confidence: 99%

Multiscale Catalysis Under Magnetic Fields: Methodologies, Advances, and Trends

Liu

Huang

et al. 2022

ChemCatChem

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Magnetic field‐enhanced catalysis is an advanced strategy for enhancing catalytic reactions that have emerged in recent years, presenting great potential for alleviating the energy crisis and environmental pollution. Under favorable non‐contact magnetic field conditions, the external magnetic field that produces the enhancement effect can provide additional energy to the catalytic system as an additional driving force for the catalytic reaction and thus positively improve the overall catalytic efficiency. Exploring the effects of magnetic fields on multiscale catalytic reactions can broaden the practical applications of various catalytic reactions. This review begins with a brief introduction and analysis of possible mechanisms for magnetic field‐enhanced catalytic reactions (including spin polarization theory and electromagnetic theory), a description of the forces generated by magnetic fields, nano‐ and microscale magnetic materials, and various commonly used magnetic manipulation systems, and an overview of the application of magnetic fields to enhanced photocatalytic, electrocatalytic and biocatalytic reactions. Finally, the challenges and future prospects for advancing magnetic field‐enhanced catalytic reactions are presented. It is hoped that this review will provide a reference for the development and in‐depth study of magnetic field‐assisted enhanced catalytic reactions to improve catalytic efficiency.

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“…[1][2][3][4][5][6] Among reported routes, the employment of a magnetic field has been considered as an effective strategy, and significant advances have been achieved in different catalysis fields, including photocatalysis, [7][8][9][10][11] electrocatalysis, [11][12][13][14][15][16][17] and thermocatalysis, [18] leading to significantly enhanced performance and allowing for wireless control of catalytic reactions. [19,20] It is concluded that magnetic fields can affect the spin polarization of magnetic materials, thereby accelerating the movement of free charge carriers and increasing the rate of electron transfer to the surface and generation of free radicals participating in catalytic reactions. [1,7,21] As well as being an invaluable variable, the magnetic field can be used as an effective controller of both the product and the rate of a chemical reaction process.…”

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confidence: 99%

Magnetic field driven catalysis of multiferroic magnetoelectric nanocomposites

Liu,

2023

MatLab

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Magnetic field as a booster for catalytic reactions has been widely studied in the past few decades. Recently, multiferroic materials with intriguing magnetoelectric coupling effects have been emerging as a new type of catalyst, providing a unique opportunity for magnetically-driven catalytic reactions in a variety of fields, including clean energy, environmental and biomedical applications. In this review, we describe this entirely new catalysis phenomenon observed in multiferroic magnetoelectric composite materials, aiming at giving an in-depth understanding of magnetically-driven catalysis processes based on the direct magnetoelectric-catalytic effect. Moreover, the latest progress in catalytic applications of magnetoelectric nanocomposite nanomaterials is comprehensively summarized. Finally, the challenges and future perspectives for the design and application of high-efficient magneto-multiferroic catalysts are discussed.

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Magnetic Field and Temperature Dependencies Shed Light on the Recombination Kinetics of a Transition Metal Donor/Acceptor System

Cited by 6 publications

References 39 publications

Ultrafast giant magnetic cooling effect in ferromagnetic Co/Pt multilayers

Ultrafast giant magnetic cooling effect in ferromagnetic Co/Pt multilayers

Multiscale Catalysis Under Magnetic Fields: Methodologies, Advances, and Trends

Magnetic field driven catalysis of multiferroic magnetoelectric nanocomposites

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