2,5-Dibromo-1,1-disubstituted-3,4-diphenyl-siloles (e.g, diethyl, dihexyl, diisopropyl) were prepared by reactions of disubstituted-bis(phenylethynyl)silanes with lithium naphthalenide, anhydrous ZnCl2, and N-bromosuccinimide (NBS), respectively. Palladium chloride, copper iodide, and triphenylphosphine as co-catalyst were used to replace two bromine groups of the prepared siloles with trimethylsilylacetylene (TMSA) under the reaction condition of diisopropylamine as solvent. The crude products were refined by recrystallization or column chromatography in the solvent of hexane. The product materials were characterized by 1H, 13C, and 29Si NMR. We also studied the photoelectronic properties of the materials by UV-vis absorption, excitation and fluorescence emission spectroscopic methods.

Synthesis and their characteristics of 1,1-disubstituted-2,5-bis{(trimethylsilyl)ethynyl}-3,4-diphenyl-siloles

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.