RE-EXAMINATION OF THE LUMINESCENT PROPERTIES OF THE MIXED PHENYL- AND P-BIPHENYLYL SILANES.
Abstract
Some luminescent properties of the tetraaryl silane family composed of tetraphenyl silane, triphenyl-pbiphenylyl silane (Silane I), diphenyl-di-p-biphenylyl silane (Silane II), phenyl-tri-p-biphenylyl silane (Silane III), and tetra-p-biphenylyl silane (Silane IV) were re-examined to determine the effect of a p-quaterphenyl impurity on the luminescent properties previously reported. Molar extinction coefficient calculations indicate that the pbiphenylyl-substituted silanes absorb light in direct proportion to the number of p-biphenylyl molecules attached to the silicon atom. The absorption spectra are apparently not affected by the p-quaterphenyl impurity. The visible fluorescence previously reported for the p-biphenylyl silanes was found to be due to the p-quaterphenyl impurity. Pure silanes I, II, III, and IV have fluorescence emission in the 310-320 millimicron region. Phosphorescence in the region 425-500 millimicrons was observed for Silanes I, II, and III. Mean lifetimes of 2.5 seconds for Silane I, and 2.0 seconds for Silanes II and III were calculated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1964
- Accession Number
- AD0603615
Entities
People
- Edward A. Peterson
Organizations
- Air Force Institute of Technology