Structure investigations of solid organosilicon polymers by high resolution solid state 29Si NMR |
| |
Authors: | G Engelhardt H Jancke E Lippmaa A Samoson |
| |
Institution: | Central Institute of Physical Chemistry, Academy of Sciences of the GDR, 1199 Berlin-Adlershof G.D.R.;Institute of Chemical and Biological Physics, Estonian Academy of Sciences, 200 001 Tallinn U.S.S.R. |
| |
Abstract: | The high resolution 29Si NMR spectra of five solid silicon polymers of different structure have been studied and the 29Si chemical shifts of characteristic structure units determined. 29Si1H cross-polarization in combination with high speed magic angle sample spinning and high power proton decoupling was used to achieve high resolution in the solid state spectra. Comparison of the latter with the results obtained in the liquid state clearly indicates that no special solid state effects on 29Si chemical shifts arise and the relations between δ(Si) and the molecular structure, well known from investigations of liquids, can be used for interpretation of the solid state spectra. It is shown that high resolution solid state 29Si NMR spectroscopy offers detailed information about the structural units of the siloxane resin framework, and this opens up new possibilities for structural determinations of solid organosilicon polymers. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|