Zero-Field Splitting in {MnIII3(μ3-O)} Core Single-Molecule Magnets Investigated by Inelastic Neutron Scattering and High-Field Electron Paramagnetic Resonance Spectroscopy

2015 ◽  
Vol 2015 (16) ◽  
pp. 2683-2689 ◽  
Author(s):  
Marc Sigrist ◽  
Philip L. W. Tregenna-Piggott ◽  
Kasper S. Pedersen ◽  
Mikkel A. Sørensen ◽  
Anne-Laure Barra ◽  
...  
Keyword(s):  
Single Molecule ◽  
Inelastic Neutron Scattering ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Inelastic Neutron ◽  
Resonance Spectroscopy ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Single Molecule Magnets ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

scholarly journals Rapid and precise determination of zero-field splittings by terahertz time-domain electron paramagnetic resonance spectroscopy

2017 ◽  
Vol 8 (11) ◽  
pp. 7312-7323 ◽  
Author(s):  
Jian Lu ◽  
I. Ozge Ozel ◽  
Carina A. Belvin ◽  
Xian Li ◽  
Grigorii Skorupskii ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance Spectroscopy ◽  
Spin Transition ◽  
Precise Determination ◽  
Resonance Spectroscopy ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Paramagnetic Resonance ◽  
Free Induction ◽  
Electron Paramagnetic

Single-cycle THz fields induce free-induction decays from high-spin transition-metal complexes, yielding THz EPR spectra and zero-field splitting parameters from a simple tabletop measurement.

Structure-function relationship in antimony corrole photosensitizers: Time-resolved electron paramagnetic resonance and optical study

2007 ◽  
Vol 11 (09) ◽  
pp. 645-651 ◽  
Author(s):  
Linn Wagnert ◽  
Alexander Berg ◽  
Eli Stavitski ◽  
Inna Luobeznova ◽  
Zeev Gross ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Flash Photolysis ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Paramagnetic Resonance ◽  
Time Resolved ◽  
Axial Ligands ◽  
Electron Paramagnetic

Three photosensitizers based on tris-(pentafluorophenyl)antimony corroles that differ in oxidation state and axial ligands, namely, (pyridine) Sb (III)-, (oxo) Sb (V)- and (difluoro) Sb (V) complexes, were studied by time-resolved electron paramagnetic resonance spectroscopy and laser flash photolysis. The magnetic and orientational parameters of the corroles oriented in a nematic liquid crystal as well as their triplet lifetimes in liquid toluene were determined and interpreted in terms of their structure and geometry. The negative zero-field splitting parameter D assigned to all studied corroles is explained by the asymmetric π-electron withdrawal effect caused by perfluorinated peripheral aryl groups, which force the triplet electron spins to align in head-to-tail configuration. The effect of the axial ligands on the photoexcited triplet state properties of the corroles is correlated with their different efficiency to perform photoassisted aerobic oxygenation of some organic molecules. This is explained by the dependence of the main parameters of the photoexcited complexes on the interaction between the central ion and corrole π-system. This interaction is strongly influenced by axial ligands coordination, affecting the macrocycle symmetry, planarity, and rigidity.

scholarly journals Combining Molecular Spintronics with Electron Paramagnetic Resonance: The Path Towards Single-Molecule Pulsed Spin Spectroscopy

2020 ◽  
Vol 51 (11) ◽  
pp. 1357-1409
Author(s):  
Michael Slota ◽  
Lapo Bogani
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Quantum Transport ◽  
Single Molecule ◽  
Transport Systems ◽  
Resonance Spectroscopy ◽  
Single Molecule Magnets ◽  
Paramagnetic Resonance ◽  
Single Molecule Level ◽  
Molecular Spintronics ◽  
Electron Paramagnetic

AbstractWe provide a perspective on how single-molecule magnets can offer a platform to combine quantum transport and paramagnetic spectroscopy, so as to deliver time-resolved electron paramagnetic resonance at the single-molecule level. To this aim, we first review the main principles and recent developments of molecular spintronics, together with the possibilities and limitations offered by current approaches, where interactions between leads and single-molecule magnets are important. We then review progress on the electron quantum coherence on devices based on molecular magnets, and the pulse sequences and techniques necessary for their characterization, which might find implementation at the single-molecule level. Finally, we highlight how some of the concepts can also be implemented by including all elements into a single molecule and we propose an analogy between donor–acceptor triads, where a spin center is sandwiched between a donor and an acceptor, and quantum transport systems. We eventually discuss the possibility of probing spin coherence during or immediately after the passage of an electron transfer, based on examples of transient electron paramagnetic resonance spectroscopy on molecular materials.

scholarly journals Kilohertz electron paramagnetic resonance spectroscopy of single nitrogen centers at zero magnetic field

2020 ◽  
Vol 6 (22) ◽  
pp. eaaz8244
Author(s):  
Fei Kong ◽  
Pengju Zhao ◽  
Pei Yu ◽  
Zhuoyang Qin ◽  
Zhehua Huang ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Molecule ◽  
Epr Spectroscopy ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Nitrogen Vacancy ◽  
Zero Magnetic Field ◽  
Resonance Spectroscopy ◽  
Ambient Conditions ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Electron paramagnetic resonance (EPR) spectroscopy is among the most important analytical tools in physics, chemistry, and biology. The emergence of nitrogen-vacancy (NV) centers in diamond, serving as an atomic-sized magnetometer, has promoted this technique to single-spin level, even under ambient conditions. Despite the enormous progress in spatial resolution, the current megahertz spectral resolution is still insufficient to resolve key heterogeneous molecular information. A major challenge is the short coherence times of the sample electron spins. Here, we address this challenge by using a magnetic noise–insensitive transition between states of different symmetry. We demonstrate a 27-fold narrower spectrum of single substitutional nitrogen (P1) centers in diamond with a linewidth of several kilohertz, and then some weak couplings can be resolved. Those results show both spatial and spectral advances of NV center–based EPR and provide a route toward analytical (EPR) spectroscopy at the single-molecule level.

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