29Si NMR measurement using silicon free probe

  • Summary

NM130006E

Standard materials used in NMR probe construction, as well as normal NMR tubes, inevitably contain silicon which is visible as abroad peak in the spectrum. As this is due to a Q4unit, it will overlap at similar chemical shifts to Q3 and Q4 units in any sample being measured. The use of a silicon free probe and suitable tubes completely suppresses the background signal and even small signals can be clearly seen.

29Si spectra without sample

29Si spectra without sample
Standard probe - broad background signal
Sillicon free probe - no background signal

Actually measured data

Actually measured data
Sample: sodium silicate solution/D20
Spectrometer: JNM-ECAII600

Upper spectrum: Data from standard probe with heat-resistant glass tube
Lower spectrum: Data from Sillicon free probe with PTFE tube

This probe is particularly effective for broad peaks and dilute solutions!

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