c*****r
发帖数: 1476 | 1 29Si内标（必须是固体）用来做定量分析。
只要在-70 到 -140 ppm 没有峰就可以。谢谢！ |
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y*****s
发帖数: 1047 | 2 http://en.wikipedia.org/wiki/Chemical_shift#Chemical_shift_refe
The detected frequencies (in Hz) for 1H, 13C, and 29Si nuclei are usually
referenced against TMS (tetramethylsilane) or DSS, which is assigned the
chemical shift of zero. Other standard materials are used for setting the
chemical shift for other nuclei.
DSS is a solid at room temperature |
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c*****r
发帖数: 1476 | 6 Thanks a lot!
I picked Si(SiMe3)4 (delta, -9.8, -135.5) |
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h******g
发帖数: 600 | 7 Title: 29Si NMR Spectroscopy of Organosilicon Compounds
Author: Yoshito Takeuchi, Toshio Takayama
Link: http://onlinelibrary.wiley.com/doi/10.1002/0470857250.ch6/summary
Please send the document to [email protected]
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