Gadolinium based endohedral metallofullerene Gd2@C79N as a relaxation boosting agent for dissolution DNP at high fields. Issue 19 (19th February 2018)

• Record Type: Journal Article
• 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.
• Is Part Of: Chemical communications. Volume 54:Issue 19(2018)
• Page Start: 2425
• Page End: 2428
• Publication Date: 2018-02-19
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc09765d
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : The endohedral metallofullerene Gd2 @C79 N showing unprecedented boosting effects in combination with 4-oxo-TEMPO for dissolution DNP at 5 T. Abstract : 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 Gd2 @C79 N, the nuclear polarization of 1 H and 13 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.