Synthesis and Properties of Silole-Containing σ- and π-Conjugated Compounds

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Reported herein are the developments and applications of new silole-containing σ- and π-electronic systems. A series of 2, 5- and 1, 1-difunctionalized. siloles have been prepared based on the intramolecular reductive cyclization of diethynylsilanes. Starting from these functionalized siloles, oligo (2, 5-silole) s and oligo (1, 1-silole) s have been synthesized as model compounds for poly (2, 5-silole) s and poly (1, 1-silole) s, respectively, which are still veiled target molecules in this field. Some silolebased π-conjugated cooligomers and copolymers with thiophene, pyrrole, and acetylene π-electronic systems have been prepared and their photophysical properties have been determined. Application of silole π-electronic systems to organic electroluminescent (EL) devices has also been examined.