Contents 1. Introduction 2. Nomenclature and NMR conventions 2.1 Notation for glass compositions and structural concepts 2.2 NMR frequencies and chemical shifts 2.3 Magic-angle spinning 3. Basic structural features of (alumino)silicate glasses 3.1 Amorphous SiO 2 and silicate glasses 3.2 Al 2 O 3 and aluminate phases 3.3 Aluminosilicate glasses 3.4 Split-network representation of aluminosilicate glasses 4. Chemical shifts of 27 AlO p groups in oxide-based materials 5. NMR features of half-integer spin quadrupolar nuclei 5.1 Quadrupolar nuclei and electric field gradients 5.2 First-order quadrupolar interaction 5.3 Second-order quadrupolar interaction 5.4 Distributions of chemical shift and quadrupolar parameters in glasses 6. Sensitivity considerations for 27 Al NMR 7. Rf pulses and quadrupolar interactions 8. Practical advice for recording quantitative 27 Al MAS NMR spectra 8.1 Magnetic field and MAS rate 8.2 Magic-angle calibration 8.3 T 1 relaxation concerns 8.4 Rf pulse calibrations 8.5 Useful extensions of single-pulse experiments 9. High-resolution techniques 9.1 Gist of the methodology: DOR and DAS 9.2 MQMAS 10. Determining 27 Al NMR parameters and AlO p populations 10.1 Obtaining (δ iso , C Qη ) from CT MAS spectra at multiple fields 10.2 Obtaining (δ iso , C Qη ) by combining CT and ST 3/2 shifts

Mattias Edén

Annual Reports on NMR Spectroscopy

核磁共振光谱年度报告是专家和非专家熟悉核磁共振光谱新技术和应用的首要手段。本系列还介绍了磁共振成像 (MRI) 研究的最新进展。对于有机、无机、分析和物理化学家、生物化学家、结构生物学家、物理学家以及所有研究和使用 NMR 光谱学的人来说，这是一个宝贵的资源。

The Annual Reports on NMR Spectroscopy serves as a vital resource for both experts and non-experts to familiarize themselves with the latest techniques and applications in nuclear magnetic resonance spectroscopy. This series also covers recent advancements in magnetic resonance imaging (MRI) research. It is an invaluable reference for organic, inorganic, analytical, and physical chemists, biochemists, structural biologists, physicists, and anyone involved in the research and application of NMR spectroscopy.

《Annual Reports on NMR Spectroscopy》是专家和非专家了解核磁共振光谱新技术与应用的重要资源。本系列还涵盖了磁共振成像（MRI）研究的最新进展。对于有机、无机、分析和物理化学家、生物化学家、结构生物学家、物理学家以及所有研究和使用NMR光谱学的人员来说，这是一份极具价值的参考资料。

Category	Quartile
化学	3
化学, 光谱学	3

Update on 27Al NMR studies of aluminosilicate glasses

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