Abstract
We perform magnetisation sweeps on the high-performing single-molecule magnet
[Dy(Cpttt)2][B(C6F5)4] (Cpttt = C5H t
2 Bu3-1,2,4; tBu = C(CH3)3) to determine the
quantum tunnelling gap of the ground-state avoided crossing at zero-field, finding a
value on the order of 10−7 cm−1. In addition to the pure crystalline material, we also
measure the tunnel splitting of [Dy(Cpttt)2][B(C6F5)4] dissolved in dichloromethane
(DCM) and 1,2-difluorobenzene (DFB). We find that concentrations of 200 or 100 mM
[Dy(Cpttt)2][B(C6F5)4] in these solvents increases the size of the tunnelling gap compared
to the pure sample, despite a similarity in the strength of the dipolar fields,
indicating that either a structural or vibrational change due to the environment increases
quantum tunnelling rates.
[Dy(Cpttt)2][B(C6F5)4] (Cpttt = C5H t
2 Bu3-1,2,4; tBu = C(CH3)3) to determine the
quantum tunnelling gap of the ground-state avoided crossing at zero-field, finding a
value on the order of 10−7 cm−1. In addition to the pure crystalline material, we also
measure the tunnel splitting of [Dy(Cpttt)2][B(C6F5)4] dissolved in dichloromethane
(DCM) and 1,2-difluorobenzene (DFB). We find that concentrations of 200 or 100 mM
[Dy(Cpttt)2][B(C6F5)4] in these solvents increases the size of the tunnelling gap compared
to the pure sample, despite a similarity in the strength of the dipolar fields,
indicating that either a structural or vibrational change due to the environment increases
quantum tunnelling rates.
| Original language | English |
|---|---|
| Journal | Journal of Physical Chemistry Letters |
| Publication status | Accepted/In press - 13 Feb 2023 |
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Research data for "Measurement of the quantum tunnelling gap in a dysprosocenium single-molecule magnet"
Chilton, N. (Creator), University of Manchester Figshare, 5 Jan 2023
DOI: 10.48420/21740855.v1, https://figshare.manchester.ac.uk/articles/dataset/Research_data_for_Measurement_of_the_quantum_tunnelling_gap_in_a_dysprosocenium_single-molecule_magnet_/21740855/1
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