Solid state NMR interaction parameters of oxygens linking titanium and silicon in crystalline cyclic titanodiphenylsiloxanes
UNSPECIFIED (2000) Solid state NMR interaction parameters of oxygens linking titanium and silicon in crystalline cyclic titanodiphenylsiloxanes. SOLID STATE NUCLEAR MAGNETIC RESONANCE, 17 (1-4). pp. 2-14. ISSN 0926-2040Full text not available from this repository.
O-17 static and magic angle spinning NMR spectra are reported from three: crystalline cyclic titanodiphenylsiloxanes at magnetic fields of 5.6, 14.1, and 17.6 T. These compounds allow the NMR parameters characteristic of Ti-O-Si environments to be determined. It appears from these data that the quadrupole interaction (C-o) of such environments is in the range of 3-3.5 MHz and that Si-O-TiO3 sites are less shifted than Si-O-TiO5. The relatively large isotropic chemical range observed suggests that for structurally and atomically disordered titanosilicate-based materials the very highest applied magnetic field may not produce the best O-17 solid state NMR spectra. There appears to he a correlation between the O-17 shift and T-O bondlength. (C) 2001 Academic Press.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
Q Science > QC Physics
|Journal or Publication Title:||SOLID STATE NUCLEAR MAGNETIC RESONANCE|
|Publisher:||ACADEMIC PRESS INC|
|Number of Pages:||13|
|Page Range:||pp. 2-14|
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