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首页> 外文期刊>Physical chemistry chemical physics: PCCP >A role for low concentration reaction intermediates in the signal amplification by reversible exchange process revealed by theory and experiment
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A role for low concentration reaction intermediates in the signal amplification by reversible exchange process revealed by theory and experiment

机译:通过理论和实验揭示的可逆交换过程,对信号放大中的低浓度反应中间体的作用

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摘要

A route to monitor the involvement of less abundant species during the catalytic transfer of hyperpolarisation from parahydrogen into a substrate is detailed. It involves probing how the degree of hyperpolarisation transfer catalysis is affected by the magnetic field experienced by the catalyst during this process as a function of temperature. The resulting data allow the ready differentiation of the roles played by hard to detect and highly reactive complexes, such as [Ir(H)(2)(NHC)(substrate)(2)(methanol)]Cl, from dominant species such as [Ir(H)(2)(NHC)(substrate)(3)]Cl. The difference in behaviour results from changes in the interligand spin-spin coupling network within the active SABRE catalysts.
机译:详细介绍了监测戊二激素催化转移到底物中的高磷酸盐催化转移过程中较少的物质的途径。 它涉及探测超极化转移催化程度是如何受催化剂在该过程中所经受的磁场的影响,作为温度的函数。 得到的数据允许通过难以检测和高反应性复合物而开始的作用的准备分化,例如[Ir(H)(2)(2)(NHC)(2)(2)(甲醇)] Cl,如其中的主要物种,例如 [Ir(H)(2)(NHC)(底物)(3)] Cl。 在活性SABER催化剂内的中链旋转旋转耦合网络中的变化产生的行为差异。

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