MAS NMR machine, 400 MHz WB

MAS NMR 机，400 MHz WB

• 批准号: 523962358
• 金额: --
• 依托单位: Humboldt-Universität zu Berlin
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/523962358?language=en
• 关键词: MAS; NMR; machine; 400; MHz

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.

柏林洪堡大学化学系需要一台用于测量固态化合物的固态 NMR 设备，这是对一台使用良好的设备的替换购买，但该设备现在有 35（磁铁）和 20（磁铁）。由于磁体的老化，制造商的维修已无法保证。将其连接到氦回收系统，即新设备还可以节省大量运行成本，许多处理需要 MAS-NMR 测量的科学课题的研究小组也需要该设备。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 17 年前采购的一部分。需要根据应用领域，还可以测量各种原子核（主要：13C、19F、7Li、27Al、17O、31P、15N、29Si、89Y、119Sn、125Te、11B、2H）。从 1H 或 19F 到不敏感的 13C 原子核的磁化转移实验起着重要作用。这些实验中，来自更敏感的核（例如 1H、19F）的高浓度和磁化转移至关重要，不需要在第三个通道上进行额外的去耦，这就是 2 通道光谱仪就足够的原因。