How to simulate an EPR spectrum of a large molecule

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kyuichi
Newbie
Posts: 4
Joined: Sun Jan 03, 2021 8:33 pm

How to simulate an EPR spectrum of a large molecule

Post by kyuichi »

Hi All,

I am a beginner of easyspin and matlab and would like to ask for your help with the difficulties that I am facing. After setting up a calculation on Orca, then using easyspin with command orca2easyspin(.prop file).
And then, I want to simulate the EPR spectrum from the parameters of cationradical of BINOL (1,1'-bi-2-naphthol) using garlic.

I am wondering how I can get the EPR simulation spectrum using Easyspin?
I watched a video that explains how to simulate a hydroxyl radical (https://www.youtube.com/watch?v=SDyPSNDTAi4) using pepper.
However, I'm not sure how to simulate an EPR spectrum of a large molecule (in my case, BINOL).

Thanks

Regards,
kyuichi

Stefan Stoll
EasySpin Creator
Posts: 1085
Joined: Mon Jul 21, 2014 10:11 pm
Location: University of Washington

Re: How to simulate an EPR spectrum of a large molecule

Post by Stefan Stoll »

I suggest to look at some example in the "Isotropic cw EPR simulations" section of the EasySpin documentation examples.

kyuichi
Newbie
Posts: 4
Joined: Sun Jan 03, 2021 8:33 pm

Re: How to simulate an EPR spectrum of a large molecule

Post by kyuichi »

Dear Stoll,

Thank you very much for your swift reply and suggestion.
I checked a page of "biphenyl.m" (Biphenyl radical anion ).
The script only considers protons (H), not carbons (C).
In some case, it is better to consider other atoms such as carbon, but I little bit confuse how to decide atoms that I should consider.
The A values are important, but I am not sure about the threshold.

I add the all atoms that have small A values (below 1 MHz) and succeed in simulation of my target molecule.
I will also try to add all atoms (not excluding atoms showing small A).

Thanks

Regards,
kyuichi

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