Satellite-Transition MAS: A New Technique for High-Resolution Quadrupolar NMR

卫星传输 MAS：高分辨率四极核磁共振新技术

• 批准号: GR/T23824/01
• 负责人: Stephen Wimperis
• 金额: $ 29.3万
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=GR%2FT23824%2F01
• 关键词: Satellite; Transition; MAS; New; Technique

The recently developed multiple-quantum (MQ) magic-angle-spinning (MAS) and satellite-transition (ST) MAS experiments allow truly high-resolution NMR spectra of important quadrupolar nuclei, such as 17-0, 23-Na and 27-Al, to be obtained in solids using only conventional hardware. These new techniques are already being used extensively in both academia and industry to study minerals, glasses, zeolites and other microporous materials. We have been working on the development of these methods since 1995 and our research in this area has achieved wide international recognition. The two previous EPSRC grants that supported this work (GR/M12209 and GR/N07622) yielded over 25 publications and were rated extremely highly by assessors, but both have now expired.The aim of the the present proposal is to allow us to develop the STMAS method further. This is a particularly exciting new technique as it has much higher sensitivity than the older MAMAS method, while a number of interesting and unusual spin interactions are evidenced only in STMAS spectra. The technique is still very much in its infancy, since it appeared only during 2000, after the award of grant GRIN07622. In particular, we plan to improve the sensitivity of the technique still further and to develop the STMAS NMR experiment as a method of (a) recording high-resolution 25-Mg, 47-Ti and 95-Mo spectra without isotopic enrichment, and (b) studying the effects of second-order cross-term and third-order quadrupolar interactions on satellite transitions. We also aim to develop further our new SCAM (self-compensated for angle misset) variant of STMAS.

最近开发的多量器（MQ）魔法旋转（MAS）和卫星 - 转换（ST）MAS实验允许仅使用传统的固体使用常规的固体获得真正的四核核的真正高分辨率NMR光谱，例如17-0、23-NA和27-AL。这些新技术已经在学术界和行业中广泛使用，以研究矿物质，眼镜，沸石和其他微孔材料。自1995年以来，我们一直在研究这些方法的发展，我们在这一领域的研究已广泛认可。支持这项工作的前两项EPSRC赠款（GR/M12209和GR/N07622）产生了25个出版物，并受到评估者的高度评价，但两者现在已经过期了。本提案的目的是让我们进一步开发STMAS方法。这是一种特别令人兴奋的新技术，因为它具有比较旧的妈妈方法更高的灵敏度，而仅在Stmas Spectra中才能证明许多有趣且异常的自旋相互作用。该技术仍处于起步阶段，因为它仅在授予Grant Grin07622之后才出现在2000年。特别是，我们计划进一步提高该技术的敏感性，并开发STMAS NMR实验，作为（a）记录高分辨率25毫克，47-TI和95-MO光谱而没有同位素富集的方法，以及（b）研究二阶跨术和三阶跨二级和三阶二甲状化相互作用的影响。我们还旨在进一步开发我们的新骗局（自称为Angle Milset）的Stmas。

项目成果

Satellite transitions acquired in real time by magic angle spinning (STARTMAS): "ultrafast" high-resolution MAS NMR spectroscopy of spin I=3/2 nuclei.

通过魔角旋转 (STARTMAS) 实时获取的卫星跃迁：自旋 I=3/2 原子核的“超快”高分辨率 MAS NMR 光谱。

• DOI: 10.1063/1.2813892
• 发表时间: 2008
• 期刊: The Journal of chemical physics
• 作者: Thrippleton MJ