Probing scalar coupling differences via long-lived singlet states

被引：8

作者：

DeVience, Stephen J. ^{[1
]}

Walsworth, Ronald L. ^{[2
,3
,4
]}

Rosen, Matthew S. ^{[3
,5
,6
]}

机构：

[1] Harvard Univ, Dept Chem & Chem Biol, 12 Oxford St, Cambridge, MA 02138 USA

[2] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[3] Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA

[4] Harvard Univ, Ctr Brain Sci, 52 Oxford St, Cambridge, MA 02138 USA

[5] Harvard Univ, Sch Med, 25 Shattuck St, Boston, MA 02115 USA

[6] AA Martinos Ctr Biomed Imaging, 149 Thirteenth St, Boston, MA 02129 USA

来源：

JOURNAL OF MAGNETIC RESONANCE | 2016年 / 262卷

基金：

美国国家科学基金会;

关键词：

Nuclear singlet state; Spin-lock induced crossing; J coupling; Decoherence-free subspace; NUCLEAR-MAGNETIC-RESONANCE; SPIN STATES; NMR-SPECTROSCOPY; SLOW DIFFUSION; HYPERPOLARIZATION; LIFETIMES; ORDER; FIELD; MRI; POLARIZATION;

D O I：

10.1016/j.jmr.2015.12.003

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We probe small scalar coupling differences via the coherent interactions between two nuclear spin singlet states in organic molecules. We show that the spin-lock induced crossing (SLIC) technique enables the coherent transfer of singlet order between one spin pair and another. The transfer is mediated by the difference in syn and anti vicinal or long-range J couplings among the spins. By measuring the transfer rate, we calculate a J coupling difference of 8 +/- 2 mHz in phenylalanine-glycine-glycine and 2.57 +/- 0.04 Hz in glutamate. We also characterize a coherence between two singlet states in glutamate, which may enable the creation of a long-lived quantum memory. Published by Elsevier Inc.

引用

页码：42 / 49

页数：8

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