NMR Spectrometer console for 400 MHz spectrometer with pulsed field gradient NMR

计划为400兆赫核磁共振波谱仪提供一个替换控制台，用现有的低温磁体操作，因为目前的400兆赫波谱仪（1999年安装）已经过时，无法再进行足够质量和可靠性的测量。主要应用领域是分析软材料中的分子输运过程。研究的系统范围从电解质材料到功能胶体系统和多孔材料。物理化学研究采用动态核磁共振方法来表征电荷和物质的运输是重点，但结构研究的补充。主要的实验方法是基于脉冲场梯度核磁共振（PFG-NMR）。这包括多核扩散测量以及电泳NMR（eNMR），并辅以自旋弛豫。特别是锂离子电池电解质中的eNMR是一个主要的焦点，因为这种方法-最近才建立的浓缩电解质-允许使用1H，7 Li和19 F电泳迁移率对所有相关物质的传输行为进行全面表征。 计划应用于各种不同类别的电解质，例如液体有机电解质、离子液体、聚合物中的盐和聚合物凝胶电解质。其目的是解决离子相关性的作用，并从根本上理解Li+在分子水平上的传输机制。为此，需要一个数字化的最先进的NMR光谱仪，包括一个现代化的控制台，数字梯度放大器和一个宽带梯度探头，用于多核梯度实验。

It is planned to provide a replacement console for a 400 MHz NMR spectrometer, to be operated with an existing cryomagnet, since the current 400 MHz spectrometer (set up in 1999) is outdated and does not allow measurements of sufficient quality and reliability any more. The main application area is the analysis of molecular transport processes in soft materials. Studied systems range from electrolyte materials to functional colloidal systems and porous materials. Physicochemical studies employing dynamic NMR methods to characterize transport of charge and matter are the focus, however complemented by structural studies. The main experimental methods are based on pulsed field gradient NMR (PFG-NMR). This includes multinuclear diffusion measurements as well as electrophoretic NMR (eNMR), complemented by spin relaxation. In particular eNMR in Li+-conducting battery electrolytes is a major focus, since this method - only recently established for concentrated electrolytes – allows a full characterization of the transport behavior of all involved species, employing 1H, 7Li and 19F electrophoretic mobilities. Application to a variety of different classes of electrolytes is planned, such as liquid organic electrolytes, ionic liquids, salt-in-polymer and polymer gel electrolytes. The aim is to resolve the role of ion correlations and to fundamentally understand Li+ transport mechanisms on the molecular level. For this purpose a digital state-of-the-art NMR spectrometer, consisting of a modern console, digital gradient amplifiers und a broadband gradient probe head for multinuclear gradient experiments is required.