Gadolinium based endohedral metallofullerene Gd2@C79N as a relaxation boosting agent for dissolution DNP at high fields.
Gadolinium based endohedral metallofullerene Gd2@C79N as a relaxation boosting agent for dissolution DNP at high fields.
复制标题
DOI：
10.1039/c7cc09765d
复制
发表时间：
2018-03
影响因子：
4.9
通讯作者：
Xiaoling Wang;Johannes E McKay;Bimala Lama;J. van Tol;Tinghui Li;Kyle Kirkpatrick;Zhehong Gan;Stephen Hill;Joanna R Long;Harry C. Dorn
中科院分区：
文献类型：
--
作者：
Xiaoling Wang;Johannes E McKay;Bimala Lama;J. van Tol;Tinghui Li;Kyle Kirkpatrick;Zhehong Gan;Stephen Hill;Joanna R Long;Harry C. Dorn
我们显示增加动态核极化通过添加低剂量的S = 15/2钆基于内嵌金属富勒烯（EMF）的DNP样品。通过添加60 μM Gd2@C79N，在5 T和1.2 K下，40 mM 4-oxo-TEMPO的1H和13 C自旋的核极化分别增加约40%和50%。电子-电子双共振（ELDOR）测量表明，高自旋电动势缩短电子弛豫时间，增加电子光谱扩散，导致增加DNP增强。
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@C79N, the nuclear polarization of 1H and 13C 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.