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首页> 外文期刊>Journal of magnetic resonance >Broadband ~(13)C-~(13)C adiabatic mixing in solution optimized for high fields
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Broadband ~(13)C-~(13)C adiabatic mixing in solution optimized for high fields

机译：针对高场优化的解决方案中的宽带〜（13）C-〜（13）C绝热混合

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摘要

Experiments which require mixing among spins with large frequency differences are generally performed with sequences based on composite pulses or computer-optimized cycles. Adiabatic pulses generally offer several advantages over other approaches, including greater single spin inversion bandwidths and tolerance to RF inhomogeneity. Here, a novel theoretical framework is presented in order to understand how spin-spin interactions are influenced by adiabatic inversion pulses, and insights from this approach are used to design more efficient adiabatic coherence exchange experiments. For very large frequency differences, this new approach generally offers improved results over previously applied mixing sequences, as applied to ~(13)C-~(13)C experiments which are the basis of modern sidechain assignment techniques in proteins. It is also anticipated that the approach presented here will be applicable to the analysis of various alternative approaches to adiabatic mixing.
机译：通常需要使用基于复合脉冲或计算机优化周期的序列来执行需要在频率差异较大的自旋之间进行混合的实验。绝热脉冲通常比其他方法具有多个优势，包括更大的单自旋反转带宽和对RF非均匀性的容忍度。在这里，提出了一个新颖的理论框架，以了解绝热反转脉冲如何影响自旋-自旋相互作用，并且从这种方法中获得的见识被用于设计更有效的绝热相干交换实验。对于非常大的频率差异，这种新方法通常可提供优于先前应用的混合序列的改进结果，如应用于〜（13）C-〜（13）C实验的实验，后者是蛋白质中现代侧链分配技术的基础。还可以预期，这里介绍的方法将适用于绝热混合的各种替代方法的分析。

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