Single-scan measurements of nuclear spin singlet order decay rates.

Single-scan measurements of nuclear spin singlet order decay rates.
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核自旋单重态阶衰减率的单扫描测量。

DOI:
10.1039/d1cp00807b
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发表时间:
2021
期刊:
PCCP
影响因子:
--
通讯作者:
Melchiorre G
Melchiorre G
中科院分区:
--
文献类型:
--
作者:
Melchiorre G

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单重态自旋有序衰变率的测量是耗时的,由于这种形式的秩序和典型的伪二维采集模式的长期存在的性质。此外,由于超极化技术的单次激发性质,这种采集方式对于以超极化顺序运行的实验并不理想。我们提出了一种基于空间编码的方法,不仅显着减少了这些实验的持续时间,但也赋予使用自旋超极化技术的兼容性。该方法浓缩在一个单一的拍摄的可变延迟阵列用于测量衰减率在传统的伪二维弛豫实验。这导致了大量的时间节省因素,更重要的是,使实验与超极化技术兼容,因为只需要一个单一的超极化样品。此外,所提出的方法,除了提供节省时间和成本,避免了重复的超极化过程中的再现性问题。该方法加速了单重态阶衰变时间的测量和表征,并且当与超极化技术相结合时,可以促进对具有非常长的衰变时间的系统的探索。
Measurements of singlet spin order decay rates are time consuming due to the long-lived nature of this form of order and the typical pseudo-2D mode of acquisition. Additionally, this acquisition modality is not ideal for experiments run on hyperpolarized order because of the single-shot nature of hyperpolarization techniques. We present a methodology based on spatial encoding that not only significantly reduces the duration of these experiments but also confers compatibility using spin hyperpolarization techniques. The method condenses in a single shot the variable delay array used to measure decay rates in conventional pseudo-2D relaxation experiments. This results in a substantial time saving factor and, more importantly, makes the experiment compatible with hyperpolarization techniques since only a single hyperpolarized sample is required. Furthermore, the presented method, besides offering savings on time and costs, avoids reproducibility concerns associated with repetition in the hyperpolarization procedure. The method accelerates the measurement and characterization of singlet order decay times, and, when coupled with hyperpolarization techniques, can facilitate the quest for systems with very long decay times.
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DOI: --
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