Questions tagged [epr-spectroscopy]
This tag should be applied to questions concerning all aspects of electron paramagnetic resonance (EPR) spectroscopy, including the theory behind the technique and its applications in chemistry.
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Is the g tensor always "parallel" to the (hyperfine) A tensor?
I have a question about the anisotropy of the g tensor and the A tensor (hyperfine splitting tensor) in electron paramagnetic resonance (EPR).
Both tensors are symmetric, and as a result, there is for ...
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Relative magnitude of the crystal field and spin-orbit coupling
In the EPR part of the book 'Physical methods in Inorganic Chemistry' by S. Drago i found that relative magnitudes of crystal field and spin-orbit coupling affect the g values.
I understand that the ...
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Assigning structure based on EPR spectroscopy
When given two copper(II) complexes - bis(N-3-chlorophenyl-salicydenaminato)copper(II) and bis(N-3-methylphenyl-salicydenaminato)copper(II) - how can you predict their EPR spectrum and hence their g ...
CommunityBot
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EPR or NMR sample that will give narrow lines at 4 K
We have made a crossed coil setup (X and Y transmit/receiving coils) with a SQUID pick up loop along Z. I have built a similar CW NMR spectrometer with inductive pickup that can detect Teflon NMR with ...
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Can two S=1/2 centers have J and D parameters simultaneously?
I am new to EPR/ESR and need some help in connecting theory with a published experimental data. Following is my query.
What I understood from EPR theory is that two active EPR centers with S=1/2 ...
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What is the paramagnetic susceptibility of sodium at around room temperature?
Proposed solution:
This question comes from Tanner's manual Introduction to the Physics of Electrons in Solids, at the chapter dedicated to the application of the Fermi gas model. The Fermi energy is $...
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On the definition of eigenframe
While reading the following article,
Elizaveta A. Suturina, Kevin Mason, Carlos F. G. C. Geraldes, Ilya Kuprov, David Parker, Beyond Bleaney's theory: experimental and theoretical analysis of ...
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How can Spin-Orbit-Coupling allow interactions between states with different multiplicities?
I can understand how spin-orbit coupling generates the hyperfine structures that we see in textbooks but maybe my view that the L + S momenta interacting to generate a third J momentum is too ...
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g-tensor and hyperfine tensor for nitroxide spin label with 15N
Does anyone know where I can find numerical data for the $g$ tensor and hyperfine tensor for a nitroxide spin label where the nitrogen-14 atom has been replaced by a nitrogen-15 atom?
I'm really ...
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Is there any magnetic resonance spectroscopy that based on orbital angular momentum?
The different momenta of electron and nucleus are described by different quantum numbers.
(a) l and m$_l$ describe the orbital angular momentum and quantization on its component along an arbitrary ...
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What is a possible conventional interpretation of Wilfred Hagen's puzzling Electron Paramagnetic Resonance spectrum?
In searching for a conventional interpretation, Wilfred Hagen of Delft Technical University is stumped by an Electron Paramagnetic Resonance spectrum (aka Electron Spin Resonance spectrum) in "...
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Factors to consider to predict EPR
What are the factors to consider when predicting the EPR spectrum of $\ce{Cu(Ox)P(CH3)3}$ where $\ce{OX}$ is the oxalate ion?
I understand that there are several factors to consider for EPR (Electron ...
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Can % location of electron on metal or ligand be negative (EPR)?
Given an EPR spectrum of [Co(3-methoxysalen)(py)] :
and equations:
A(x) = A(iso) + B
A(z) = A(iso) - 2B
%Co in SOMO = B/B0
where A(x) and A(z) are hyperfine coupling constants measured from the ...
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Effect of transition energy gap and frequency of microwave on appearance of CW EPR spectrum
Consider continuous-wave EPR for species with only one unpaired electron in the following argument.
The interaction energy in the presence of external magnetic field of strength B is given by
$$E = Bg\...
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How to turn oil into in a gel?
I've seen some EPR experiments where they add gelatin to water with spin-probes in it, as it "hardens" it immobilizes the spin-probes so that you can check effect of tumbling rate on the EPR....
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