MAS NMR machine, 400 MHz WB

Humboldt-Universität柏林大学化学系需要一个固态核磁共振装置来测量固态化合物。这是一个非常好的设备的替换购买，然而，现在已经有35年（磁铁）和20年（主机）的历史了。不能再保证由制造商修理。在固态核磁共振光谱领域，既有人员设备，也有经验。由于磁铁的年龄，它已经不可能连接到氦气回收系统，即一个新的设备也将大大节省运行成本。许多研究小组需要该设备来处理需要核磁共振测量的科学课题。该设备还将在应用程序中列出的工作组的研究网络框架内使用。到目前为止，最常见的实验涉及1H和19F NMR测量，这就是为什么用于这些测量的新探头是应用程序的一部分。旧的样品头是17年前采购的，需要更多的维护和维修。根据应用领域的不同，还测量了各种核（主要有：13C、19F、7Li、27Al、17O、31P、15N、29Si、89Y、119Sn、125Te、11B、2H）。从1H或19F到不敏感13C核的磁化转移实验起主要作用。对于这些实验来说，来自更敏感的原子核（如1H， 19F）的高浓度和磁化转移至关重要。在第三通道上额外的解耦是不必要的，这就是为什么2通道光谱仪是足够的。

The department of chemistry of the Humboldt-Universität zu Berlin requires a solid-state NMR device for measuring solid-state compounds. This is a replacement purchase of a very well utilised device, which, however, is now 35 (magnet) and 20 (console) years old. Repairs by the manufacturer can no longer be guaranteed. Both the personnel equipment and the experience in the field of solid-state NMR spectroscopy are existing. Due to the age of the magnet, it has not been possible to connect it to the helium recovery system, i.e. a new device would also save running costs considerably. The device is needed by a number of research groups that deal with scientific topics requiring MAS-NMR measurements. The device will also be used within the framework of research networks by the working groups listed in the application. By far the most frequent experiments involve 1H and 19F NMR measurements, which is why a new probe head for these measurements is part of the application. The old sample head was procured 17 years ago and requires increased maintenance and repairs. Depending on the field of application, a wide range of nuclei (mainly: 13C, 19F, 7Li, 27Al, 17O, 31P, 15N, 29Si, 89Y, 119Sn, 125Te,11B, 2H) are also measured. Magnetisation transfer experiments from 1H or 19F to insensitive 13C nuclei play a major role. For these experiments, a high concentration and magnetisation transfer from more sensitive nuclei such as 1H, 19F is crucial. Additional decoupling on a third channel is not necessary, which is why a 2-channel spectrometer is sufficient.