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RESSON?NCIA MAGNéTICA NUCLEAR DE SUBST?NCIAS ORGANOFLUORADAS: UM DESAFIO NO ENSINO DE ESPECTROSCOPIA

机译:含氟物质的核磁共振:光谱学教学中的挑战

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Nuclear magnetic resonance is a technique that is widely used for elucidating and characterizing organic substances. Organofluorine substances have applications in many areas from drugs to liquid crystals, but their NMR spectra are often challenging due to fluoride coupling with other nuclei. For this reason, NMR spectra of this class of substances are not commonly covered in undergraduate and graduate chemistry courses and related fields. Thus, the aim of this work was the presentation and discussion of 1H, 13C, and 19F NMR spectra of eleven organofluorine substances which, in the case of 1H and 13C nuclei, showed classic patterns of first-order coupling and the effects of the fluorine nucleus in different chemical and magnetic environments. In addition, the observation of long distance coupling constants was possible through the use of apodization functions in the processing of the spectra. It is expected that the examples presented herein can be utilized and discussed in undergraduate and graduate NMR spectroscopy disciplines and thus improve the teaching and future research of organofluorine compounds.
机译:核磁共振是一种广泛用于阐明和表征有机物质的技术。有机氟物质在从药物到液晶的许多领域都有应用,但是由于氟化物与其他原子核的耦合,它们的NMR光谱通常具有挑战性。因此,此类化学物质的NMR光谱通常不在本科和研究生化学课程及相关领域中涵盖。因此,这项工作的目的是介绍和讨论11种有机氟物质的1H,13C和19F NMR光谱,在1H和13C原子核的情况下,它们显示出经典的一阶偶联模式和氟的影响在不同化学和磁性环境中的原子核。此外,通过在光谱处理中使用切趾函数,可以观察长距离耦合常数。期望本文提供的实例可以在大学和研究生的NMR光谱学学科中使用和讨论,从而改善有机氟化合物的教学和未来研究。

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