Gadolinium based endohedral metallofullerene Gd 2 @C 79 N as a relaxation boosting agent for dissolution DNP at high fields

We show increased dynamic nuclear polarization by adding a low dosage of a S = 15/2 Gd based endohedral metallofullerene (EMF) to DNP samples. By adding 60 μM Gd @C N, the nuclear polarization of H and C spins from 40 mM 4-oxo-TEMPO increases by approximately 40% and 50%, respectively, at 5 T and 1....

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Published in:Chemical communications (Cambridge, England) England), 2018-03, Vol.54 (19), p.2425-2428
Main Authors: Wang, Xiaoling, McKay, Johannes E, Lama, Bimala, van Tol, Johan, Li, Tinghui, Kirkpatrick, Kyle, Gan, Zhehong, Hill, Stephen, Long, Joanna R, Dorn, Harry C
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cited_by cdi_FETCH-LOGICAL-c999-264fe4cd45f93e1ab819bade39723b0677d64b230f70ccd3f8d8a44b4a4af5fd3
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container_end_page 2428
container_issue 19
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container_title Chemical communications (Cambridge, England)
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creator Wang, Xiaoling
McKay, Johannes E
Lama, Bimala
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Li, Tinghui
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Long, Joanna R
Dorn, Harry C
description We show increased dynamic nuclear polarization by adding a low dosage of a S = 15/2 Gd based endohedral metallofullerene (EMF) to DNP samples. By adding 60 μM Gd @C N, the nuclear polarization of H and C spins from 40 mM 4-oxo-TEMPO increases by approximately 40% and 50%, respectively, at 5 T and 1.2 K. Electron-electron double resonance (ELDOR) measurements show that the high spin EMF shortens the electron relaxation times and increases electron spectral diffusion leading to the increased DNP enhancement.
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title Gadolinium based endohedral metallofullerene Gd 2 @C 79 N as a relaxation boosting agent for dissolution DNP at high fields
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