Polysilicic Acid Esters as Precursors to New Ceramic Materials

Two simple siloxane ester chains, (Si$\sb2$O) (OCH$\sb3$)$\sb6$ and (Si$\sb3$O$\sb2$) (OCH$\sb3$)$\sb8$, and a polysilicic acid ester based on the cubic (Si$\sb8$O$\sb $) core, (Si$\sb8$O$\sb $) (OCH$\sb3$)$\sb8$ were prepared. Synthesis of the di- and trisiloxane esters was achieved by reaction of their commercially available chlorosiloxane precursors with either CH$\sb3$ONO or HC(OCH$\sb3$)$\sb3$. Similar reactions of (Si$\sb8$O$\sb $) Cl$\sb8$, prepared by photochlorination of (Si$\sb8$O$\sb $) H$\sb8$, with CH$\sb3$ONO or HC(OCH$\sb3$)$\sb3$ produce (Si$\sb8$O$\sb $) (OCH$\sb3$)$\sb8$. $\sp{29}$Si NMR spectroscopy was used to confirm the structure of each ester, and in the case of (Si$\sb8$O$\sb $) (OCH$\sb3$)$\sb8$, the structure was determined by single-crystal X-ray analysis.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemistry

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Millar, Dean Michael

Contributors dc:contributor

• Klemperer, Walter G.

• Chemistry, Inorganic
• Engineering, Materials Science

Identifier

(UMI)AAI8803141

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/70392