Hyperpolarization read-out through rapidly rotating fields in the zero- and low-field regime.

Hyperpolarization read-out through rapidly rotating fields in the zero- and low-field regime.
复制标题

通过零场和低场状态下快速旋转场的超极化读数。

DOI:
10.1039/d1cp04653e
复制
发表时间:
2022-04-06
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
通讯作者:
Bengs C
Bengs C
中科院分区:
其他
文献类型:
--
作者:
Dagys L;Bengs C

文献摘要

参考文献

被引文献

相似文献

仲氢诱发极化 (PHIP) 方法的一个组成部分是将核单线态序转换为可观测的磁化强度。在这项研究中,通过旋转磁场和弱偏置场的组合驱动的质子单重态-三重态的选择性旋转来实现向异核的极化转移。令人惊讶的是,我们发现在存在亚μT偏置场的情况下,由STORM(通过旋转磁场的单重态-三重态振荡)脉冲驱动的有效偏振转移需要几kHz量级的旋转频率。因此,旋转频率大大超过了典型的零场到超低场实验的任何内部频率。我们进一步表明,旋转场的旋转方向不是任意的,并且极大地影响最终的传输效率。其中一些方面通过考虑超极化(1-13C)富马酸盐通过实验得到证明。因此,与大多数现有方法相比,STORM 程序代表了 PHIP 实验中四极解耦偏振传输的有希望的候选者。快速旋转的磁场会在低场或零场引起超极化读数。
An integral part of para-hydrogen induced polarization (PHIP) methods is the conversion of nuclear singlet order into observable magnetization. In this study polarization transfer to a heteronucleus is achieved through a selective rotation of the proton singlet–triplet states driven by a combination of a rotating magnetic field and a weak bias field. Surprisingly we find that efficient polarization transfer driven by a STORM (Singlet–Triplet Oscillations through Rotating Magnetic fields) pulse in the presence of sub-μT bias fields requires rotation frequencies on the order of several kHz. The rotation frequencies therefore greatly exceed any of the internal frequencies of typical zero- to ultralow field experiments. We further show that the rotational direction of the rotating field is not arbitrary and greatly influences the final transfer efficiency. Some of these aspects are demonstrated experimentally by considering hyperpolarized (1-13C)fumarate. In contrast to most of the existing methods, the STORM procedure therefore represents a promising candidate for quadrupolar decoupled polarization transfer in PHIP experiments. Rapidly rotating magnetic field induces hyperpolarization read-out at low- or zero-field.
DOI: 10.1002/cphc.202100162
发表时间: 2021-08-23
期刊: CHEMPHYSCHEM
影响因子: 2.9
作者:
DeVience, Stephen J.;Greer, Mason;Rosen, Matthew S.
通讯作者: Rosen, Matthew S.
DOI: 10.1103/physrevlett.103.083002
发表时间: 2009-08-21
影响因子: 8.6
作者:
Pileio, Giuseppe;Carravetta, Marina;Levitt, Malcolm H.
通讯作者: Levitt, Malcolm H.
DOI: 10.1021/acs.jpca.6b04017
发表时间: 2016-06-30
影响因子: 2.9
作者:
Sjolander, Tobias F.;Tayler, Michael C. D.;Pines, Alexander
通讯作者: Pines, Alexander
DOI: 10.1002/asia.201800551
发表时间: 2018-05-23
期刊: Chemistry, an Asian journal
影响因子: --
作者:
Kovtunov KV;Pokochueva EV;Salnikov OG;Cousin SF;Kurzbach D;Vuichoud B;Jannin S;Chekmenev EY;Goodson BM;Barskiy DA;Koptyug IV
通讯作者: Koptyug IV
DOI: 10.1002/mrc.4642
发表时间: 2018-06
期刊: Magnetic resonance in chemistry : MRC
影响因子: --
作者:
Bengs C;Levitt MH
通讯作者: Levitt MH