Luminescent Materials From Halosilane Chemical Reduction
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
Polymeric amorphous materials containing SiH3, SiH2 and SiH moities can be prepared in bulk form by using chemical reductions of halo silanes Hn SiX4-n . These halo silanes include trichlorosilane (HSiCl3), which can be chemically reduced by lithium metal in tetrahydrofuran (THF) solvent. Other metals, such as sodium, potassium, magnesium, or their alloys or amalgams, can also be used. The reaction is promoted by the use of ultrasonic cavitation. The resulting THF soluble yellow solid is separated from the lithium chloride with an aqueous wash and dried. This material exhibits strong photoluminescence in the visible. The color did not change when heated to 140ŒC, which indicated that the material had unusual stability.