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Biradical in solution

Posted: Sat Apr 18, 2020 5:58 am
by mshyi
Hi all,

I am attempting to simulate a spectrum of a biradical in solution. Even though this is a fast-motion (and isotropic) case, I understand that garlic only works for S = 1/2 systems. As such, I am trying to use chili with a short correlation time, however I cannot seem to get it to work. The input and error are as follows.

Input:

Code: Select all

M.S = [1/2 1/2];
M.J = 100;
M.Nucs = '14N,1H,1H,14N,1H,1H'
M.n = [2 2 2 2 2 2];
M.g=[2.002267 2.002267];
M.A = [1.752899378 1.752899378 1.752899378 0 0 0; 
    0.900197577 0.900197577 0.900197577 0 0 0; 
    0.063417046 0.063417046 0.063417046 0 0 0; 
    0 0 0 1.752899378 1.752899378 1.752899378; 
    0 0 0 0.900197577 0.900197577 0.900197577; 
    0 0 0 0.063417046 0.063417046 0.063417046];
M.tcorr = 400e-12;
M.lwpp=[0.013429866 0.020150094];

Exp=struct('mwFreq',9.354,'nPoints',157,'Range',[333.0180752 334.5715681]);
Exp.Temperature = 378;

Opt.LiouvMethod = 'general';

[B,simul1]=chili(M,Exp,Opt);
Error:
Error using chili
Cannot solve the Stochastic Liouville equation for
systems with any Sys.n > 1.

Error in chili

Error in P_2_378 (line 25)
[B,simul1]=chili(M,Exp,Opt);
Might I be doing something wrong? Thank you :)

Re: Biradical in solution

Posted: Sat Apr 18, 2020 8:22 pm
by Stefan Stoll
chili does not support M.n, so you have to spell out each nucleus separately. Then, also, amke sure to use Opt.PostConvNuclei, otherwise the simulation is going to take forever.