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Thermal decomposition studies of the polyhedral oligomeric silsesquioxane, POSSh, and when it is impregnated with the metallocene bis(η5-cyclopentadienyl)zirconium(IV) dichloride or immobilized on silica

Bianchini, Daniela, Butler, Ian S., Barsan, Mirela M., Martens, Wayde N., Frost, Ray L., Galland, Griselda B., & dos Santos, Joao H.Z. (2008) Thermal decomposition studies of the polyhedral oligomeric silsesquioxane, POSSh, and when it is impregnated with the metallocene bis(η5-cyclopentadienyl)zirconium(IV) dichloride or immobilized on silica. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 71(1), pp. 45-52.

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Abstract

Thermal decomposition studies of the free polyhedral oligomeric silsesquioxane, POSSh, and when this species has been impregnated with Cp2ZrCl2 (Cp = 5-C5H5) or immobilized on SiO2 were conducted using infrared emission spectroscopy (IES) over a 100-1000 oC temperature range and by thermogravimetric analysis (TGA). The organic groups in POSSh apparently decompose thermally into Si-CH3, Si-H and other fragments. Upon impregnation with Cp2ZrCl2 however, a different thermal decomposition pathway was followed and new infrared emission bands appeared in the 1000-900 cm-1 region suggesting the formation of Si-O-Zr moieties. When immobilized on SiO2 and subjected to thermal decomposition, the POSSh species lost its organic groups and the inorganic structure remaining was incorporated into the SiO2 framework.

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ID Code: 14653
Item Type: Journal Article
Keywords: Polyhedral oligomeric silsesquioxane, Cp2ZrCl2, SiO2, Infrared emission spectroscopy, Thermogravimetric analysis
DOI: 10.1016/j.saa.2007.11.006
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 02 Sep 2008
Last Modified: 29 Feb 2012 23:46

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