FT-NMR Spectrometer

这个系正在获得适合在本科生环境中测定高场核磁共振(1H)和13C傅立叶变换核磁共振(FT-核磁共振)谱的仪器，包括课堂作业和本科生研究。200 MHz的仪器以合理的成本具有出色的灵敏度和分辨率。使用的软件与其他复杂仪器的软件类似，因此毕业后前往其他地方的学生将能够适应新地点的FT-核磁共振设备的操作。光谱将由学生直接获得，新设备将服从这样的政策。每个学生用户都经历了使用1H和13C傅立叶变换核磁共振验证未知数的结构，验证反应产物的结构，测量平衡或混合物中组分的百分比，从1H和13C傅立叶变换核磁共振获得结构信息，通过去耦合技术分析耦合模式，测量松弛时间，注意变温光谱中的影响，以及分析其他问题。学生们还将学习如何将FT-核磁共振光谱与其他分析方法(如气相色谱和液体色谱)以及其他光谱方法(如红外紫外-可见光谱和质谱仪)结合使用，以解决结构和分析问题。通过直接参与操作FT-核磁共振光谱仪和解释结果，学生获得了对化学知识的进步和发展至关重要的结构分析方法的实践经验。这对于刚接触化学的学生和从事本科生研究项目的学生来说都很重要。

This department is obtaining instrumentation suitable to determine high-field lH and 13C Fourier-transform nuclear magnetic resonance (FT-NMR) spectra in an undergraduate environment, which includes classroom work and undergraduate research. The 200-MHz instrument has excellent sensitivity and resolution capabilities at a reasonable cost. The software used is similar to that of other sophisticated instruments, so that students going elsewhere after graduation will be able to adjust to the operation of FT-NMR equipment at a new location. Spectra are to be obtained directly by students, the new equipment being amenable to such a policy. Each student-user experiences proving the structure of unknowns using lH and 13C FT-NMR, verifying the structure of a product of reaction, measuring the percentage of components in an equilibrium or a mixture, deriving structural information from both lH and 13C FT-NMR, analyzing patterns of coupling through decoupling techniques, measuring relaxation times, noting effects in variable-temperature spectra, and analyzing other problems. Students also see how FT-NMR spectra can be used in tandem with other analytical methods, such as gas and liquid chromatography, and with other spectroscopic methods, such as infrared ultraviolet-visible spectroscopy and mass spectrometry, to solve structural and analytical problems. Through direct participation in operating the FT-NMR spectrometer and interpreting results, students gain hands-on experience with a method of structural analysis that has become crucial to the progress and development of chemical knowledge. This is important for students who are new to chemistry and also for those who are engaged in undergraduate research projects.