The curie constant for a single spin must be C = 0.375 emuKmol-1. But we obtain C = 0.04 emuKmol-1. this is nearly 10 times lower than what we expect! Resulting in a 3 times lower magnetic effective moment.
Things to take into account:
The sample displays paramagnetic behavior from 3-300 K.
The organic radical is completely pure
The sample preparation was handled with great care in the glove box
Silver capsules were used as sample holders (we measured the Magnetic susceptibility of the capsules and nothing was observed)
The sample is crystalline and measured in solid state.
All calculations were checked several times.
Ruling out the calculation and purity issues, what else could cause this sample to have such a low magnetization? any references are welcome.
Thanks
It could be that your radical is dimerized and therefore the observed susceptibility is lower than expected
Thanks Antonio! But do you think that even with the bulky groups protecting the radical and even at solid state this could happen? thanks again
It could help if you have an xray, but if you have a look at my published papers you will see that sometimes, even with bulky groups dimerisation is possible.
From the crystal structure we find that the distance between the radicals is 9.6A (intramolecular) and 8A (intermolecular). I will take a look at your publications to see if I can find some plausible answers. Thanks a lot
Measurements were done at 1T, 3-300K and I did not use any pink tape.
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