NMR-spectrometer (400 MHz) for measurements in the liquid phase

液态核磁共振波谱是分子化学领域的一种核心分析方法，在任何化学研究所都是日常应用的。它提供了关于核磁共振活性核的局部环境的信息，从而提供了关于化合物结构的信息。由于汉诺威莱布尼茨大学更加专注于化学材料科学、有机-无机材料和聚合物领域的研究，最近许多教授职位的任命都证明了这一点，与过去相比，现在对液体中的核磁共振测量的需求要高得多。除了更高的需求外，还有新的科学任务，这就需要为特定科学项目设计的设备配置。这包括对含有杂元素的化合物进行测量，这些化合物的特点是丰度或灵敏度较低，以及扩散测量。第一台用于化学材料科学的液相核磁共振波谱仪应设在该大学新的中心实验室cfMATCH(化学材料科学的核心设施多尺度分析技术)。因此，整个大学的一大群用户都可以使用这台机器。由于结合了高性能控制台和不同的探头，并且可以使用更大的样本体积(10 Mm)，主单元(400 MHz)允许测量Lamour频率，低至特别低的频率(12.5 MHz)。除了标准核(1H、13C)外，还可以实现适用于7Li、11B、15N、19F、27Al、29Si、31P、57Fe、103Rh、105Pd、111Cd、119Sn、151Eu、157Gd、183W、195PT和207Pb等核的全宽带宽。通过在-100°C到+150°C的范围内调节探头的温度，可以研究与温度相关的效应和动力学。扩散有序谱(DOSY)可以在z方向高达50G/cm的磁场梯度中进行。这种相对较高的场梯度的优点是，它可以研究流体动力学半径较大的化合物，从而可以研究较小的扩散速率。测量受限扩散过程也是可能的。

Liquid-phase NMR spectroscopy is a central analytical method in the area of molecular chemistry, which is applied on a daily basis in any chemical institute. It delivers information about the local environment of NMR-active nuclei and, thus, about the structure of compounds. Because of a stronger focus in research at the Leibniz-University Hannover in the field of chemical material science, organic-inorganic materials and polymers, which is documented by numerous, recent appointments for professor positions, there is now a significantly higher need for NMR-measurements in the liquid phase compared to the past. In addition to higher demand, there are also new scientific tasks, which require equipment with a configuration designed for the particular scientific projects. This involves measurements on compounds containing hetero-elements, which are characterized by low abundance or sensitivity, as well as diffusion measurements. The first liquid-phase NMR spectrometer for chemical material science should be situated in a new central laboratory of the university, cfMATCH (core facility multi-scale analysis techniques for the chemical material science). The machine will, thus, be accessible for a large group of users spanning the entire university. The main unit (400 MHz) allows to measure Lamour-frequencies down to particularly low frequencies (12.5 MHz) because of a combination with a high-performance console and different probe heads, and the possibility to use enlarged sample volumes (10mm). Besides standard nuclei (1H, 13C) one can perform the full width band width suitable for nuclei such as 7Li, 11B, 15N, 19F, 27Al, 29Si, 31P, 57Fe, 103Rh, 105Pd, 111Cd, 119Sn, 151Eu, 157Gd, 183W, 195Pt, and 207Pb. Temperature-dependent effects and kinetics can be investigated using the temperature adjustment of the probe heads in the range -100°C till +150°C. Diffusion ordered spectroscopy (DOSY) can be performed in a magnet field gradient in z-direction of up to 50 G/cm. The advantage of such a relatively high field gradient is that it enables the study of compounds with large hydrodynamic radius and, thus, small diffusion rates. The measurement of confined diffusion processes is possible as well.