Integrated, Stretched, and Adiabatic Solid Effects,The Journal of Physical Chemistry Letters

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Integrated, Stretched, and Adiabatic Solid Effects
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2022-06-17 , DOI: 10.1021/acs.jpclett.2c01147
Yifan Quan ₁ , Jakob Steiner ₂ , Yifu Ouyang ₁ , Kong Ooi Tan _{1,

3} , W Thomas Wenckebach _{2,

4} , Patrick Hautle ₂ , Robert G Griffin ₁

Affiliation

This paper presents a theory describing the dynamic nuclear polarization (DNP) process associated with an arbitrary frequency swept microwave pulse. The theory is utilized to explain the integrated solid effect (ISE) as well as the newly discovered stretched solid effect (SSE) and adiabatic solid effect (ASE). It is verified with experiments performed at 9.4 GHz (0.34 T) on single crystals of naphthalene doped with pentacene-d₁₄. It is shown that the SSE and ASE can be more efficient than the ISE. Furthermore, the theory predicts that the efficiency of the SSE improves at high magnetic fields, where the EPR line width is small compared to the nuclear Larmor frequency. In addition, we show that the ISE, SSE, and ASE are based on similar physical principles and we suggest definitions to distinguish among them.

中文翻译：

集成、拉伸和绝热实体效果

本文介绍了一种理论，描述了与任意频率扫描微波脉冲相关的动态核极化 (DNP) 过程。该理论被用来解释积分固体效应（ISE）以及新发现的拉伸固体效应（SSE）和绝热固体效应（ASE）。它已通过在 9.4 GHz (0.34 T) 下对掺杂并五苯- d ₁₄的萘单晶进行的实验进行验证. 结果表明，SSE 和 ASE 比 ISE 更有效。此外，该理论预测 SSE 的效率在高磁场下会提高，其中 EPR 线宽与核拉莫尔频率相比较小。此外，我们表明 ISE、SSE 和 ASE 基于相似的物理原理，我们建议定义以区分它们。

更新日期：2022-06-17

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