Catalytic synthesis of silicon carbide preceramic polymers: Polycarbosilanes
Polycarbosilanes are the most successful and widely studied class of polymer precursors for silicon carbide, but traditional methods for their synthesis are inefficient and nonselective. This project is focused on developing transition metal catalysts for the synthesis of polycarbosilanes and other preceramic polymers. In recent work we have developed the first homogeneous transition metal catalysts for the dehydrogenative coupling of simple alkyl silanes to oligomeric and polymeric carbosilanes, H-(SiR[sub 2]CR[prime][sub 2])n-SiR[sub 3]. The coupling of alkylgermanes, however, yields the corresponding oligomeric poly(germanes) (Ge-Ge). Future work will help elucidate the mechanisms of these catalytic process, explore the use of hydrogen acceptors as reaction accelerators, and develop new and more active catalysts.
- Research Organization:
- Pennsylvania Univ., Philadelphia, PA (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-91ER14173
- OSTI ID:
- 6715947
- Report Number(s):
- DOE/ER/14173-T1; ON: DE93008634
- Country of Publication:
- United States
- Language:
- English
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Catalytic synthesis of silicon carbide preceramic polymers: Polycarbosilanes
Catalytic synthesis of silicon carbide preceramic polymers: Polycarbosilanes. Research progress report, March 1, 1991--October 31, 1991
Related Subjects
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CARBIDES
CARBON COMPOUNDS
CATALYSIS
CATALYSTS
COMPLEXES
DOCUMENT TYPES
GERMANIUM COMPLEXES
HYDRIDES
HYDROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PRECURSOR
PROGRESS REPORT
RUTHENIUM COMPLEXES
SILANES
SILICON CARBIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPLEXES