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Solid state NMR interaction parameters of oxygens linking titanium and silicon in crystalline cyclic titanodiphenylsiloxanes

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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 0926-2040.

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Abstract

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
ISSN: 0926-2040
Official Date: 2000
Dates:
DateEvent
2000UNSPECIFIED
Volume: 17
Number: 1-4
Number of Pages: 13
Page Range: pp. 2-14
Publication Status: Published

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