| 書目名稱 | Oxygen-17 and Silicon-29 | | 編輯 | Jean-Pierre Kintzinger,Heinrich Marsmann | | 視頻video | http://file.papertrans.cn/706/705439/705439.mp4 | | 叢書名稱 | NMR Basic Principles and Progress | | 圖書封面 |  | | 描述 | Although it was shown very early [1] that the isotope 29Si is very valuable for NMR research, severe technical difficulties had to be overcome before silicon spectra could be recorded. This was due to the low sensitivity of the isotope resulting from its low gyro magnetic ratio, its low abundance and the rather long relaxation times. The introduction of the Fourier-Transform-Technique (FT-NMR) helped to surmount most of these problems, with the result, that more and more papers concerning silicon NMR appear. Thus, it seems now that most of the salient features of 29Si-NMR are known today. Some resume of the state of the art of 29Si_NMR have been reported [1-4]. Although the theory of 29Si-NMR is not yet understood beyond the basic features, it promises to be of value mainly for two reasons: 1. Silicon is strategically located in the Periodic Table of the elements between the elements carbon, aluminum and phosphorus. For an unified theory of chemical shifts and coupling constants of the heavier elements silicon NMR values will be important. 2. The normal coordination number of silicon is four. If the current view of the chemical shifts of the heavier elements is correct, then the pa | | 出版日期 | Conference proceedings 1981 | | 關(guān)鍵詞 | Magnetische Kernresonanz; NMR; Oxygen; Silicon; carbon; experiment; isotope; nuclear magnetic resonance (NM | | 版次 | 1 | | doi | https://doi.org/10.1007/978-3-642-87762-9 | | isbn_softcover | 978-3-642-87764-3 | | isbn_ebook | 978-3-642-87762-9Series ISSN 0170-5989 | | issn_series | 0170-5989 | | copyright | Springer-Verlag Berlin Heidelberg 1981 |
The information of publication is updating
|
|
|Archiver|手機(jī)版|小黑屋|
派博傳思國(guó)際
( 京公網(wǎng)安備110108008328)
GMT+8, 2025-10-5 22:04
發(fā)表于 2025-3-21 19:09:22
