Control of excitation selectivity in pulse EPR on spin-correlated radical pairs with shaped pulses

Panariti, Daniele; Conron, Sarah M.; Zhang, Jinyuan; Wasielewski, Michael R.; Di Valentin, Marilena; Tait, Claudia E.

doi:10.1039/d3cp06009h

Phys. Chem. Chem. Phys.

2024

DOI: 10.1039/d3cp06009h

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Control of excitation selectivity in pulse EPR on spin-correlated radical pairs with shaped pulses

Daniele Panariti,

Sarah M. Conron,

Jinyuan Zhang

et al.

Abstract: Spin-correlated radical pairs generated by photoinduced electron transfer are characterised by a distinctive spin polarisation and a unique behaviour in pulse Electron Paramagnetic Resonance (EPR) spectroscopy. Under non-selective excitation, an...

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Determination of exchange coupling constants in the electronic ground and excited states of molecular multi-spin systems

Quintes,

Franz,

Thielert

et al. 2024

Chemical Physics Reviews

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The interaction between unpaired electrons determines the magnetic properties of molecular materials and consequently their applicability. In particular, for applications of organic multi-spin systems in the emerging field of molecular spintronics, being able to control such electronic interactions is desirable, as this would pave the way for the creation of materials with tailor-made magnetic properties. Inter-spin interactions can be divided into two different categories, namely, dipolar and exchange interactions. Dipolar interactions are well predictable due to their defined distance dependence, while exchange interactions are difficult to determine since they exhibit a complex dependence on the molecular structure. Any approaches to tune the magnetic properties of molecular multi-spin systems, thus, need to focus on controlling the magnitude of the exchange interaction. In this tutorial review, we outline the theoretical background of exchange coupling and provide an overview of different experimental and computational methods available for the determination of exchange coupling constants in the electronic ground and excited states of molecular materials. We conclude by discussing the current limitations and challenges in the determination of exchange coupling parameters in these materials.

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Determination of exchange coupling constants in the electronic ground and excited states of molecular multi-spin systems

Quintes,

Franz,

Thielert

et al. 2024

Chemical Physics Reviews

View full text Add to dashboard Cite

show abstract

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Control of excitation selectivity in pulse EPR on spin-correlated radical pairs with shaped pulses

Abstract: Spin-correlated radical pairs generated by photoinduced electron transfer are characterised by a distinctive spin polarisation and a unique behaviour in pulse Electron Paramagnetic Resonance (EPR) spectroscopy. Under non-selective excitation, an...

Cited by 1 publication

References 74 publications

Determination of exchange coupling constants in the electronic ground and excited states of molecular multi-spin systems

Determination of exchange coupling constants in the electronic ground and excited states of molecular multi-spin systems

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