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 |
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Journal | Journal of Physical Chemistry Letters |
DOIs | |
Publication status | Published - 22 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
Dataset
Equipment
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EPSRC National Research Facility for Electron Paramagnetic Resonance
Collison, D. (Academic lead), Mcinnes, E. (Academic lead), Tuna, F. (Academic lead), Bowen, A. (Academic lead), Shanmugam, M. (Senior Technical Specialist), Brookfield, A. (Technical Specialist), Fleming, E. (Other) & Cliff, M. (Platform Lead)
FSE ResearchFacility/equipment: Facility