Silole-Thiophene Alternating Copolymers with Narrow Band Gaps

Conjugated random and alternating 2,3,4,5-tetraphenylsilole-containing polyfluorenes: Synthesis, characterization, strong solution photoluminescence, and light-emitting diodes

“…Siloles exhibit high electron acceptability [7] and fast electron mobility [8] and have been utilized as electron-transporting and light-emitting layers in the fabrication of EL devices [9][10][11]. There are great efforts to incorporate siloles into polymers [12][13][14][15][16][17][18][19][20]. Silole-containing polymers, such as poly (2,5-silole) [12], poly(1,1-silole) [13], silole-thiophene copolymers [14], silole-fluorene copolymers [15,16], silole-acetylene copolymers [17], silole-silane polymers [18], silole side chain polymers [19], and hyperbranched polysiloles [20] have been reported.…”

Electrochemical and Photovoltaic Properties of Electropolymerized Poly(thienylsilole)s

“…One pot, two step methodology involving Tamao's reductive cyclization followed by Negishi cross-coupling was utilized (Scheme 1) to prepare the required silole-thiophene monomers in good overall yield. 16,17 Mono bromobithiophene and monobromoterthiophene were prepared according to the literature. [18][19][20][21] 2,2-Bithiophene (BT) (Aldrich) was purified through vacuum sublimation.…”

Metal‐Catalyzed Cross‐Coupling Reactions of Organoboron Compounds with Organic Halides

“…The synthesis of silole-thiophene copolymers (EL device) has been hampered by the limited availability of suitable boron precursors. Silole-2,5-diboronic acid (250) can now be obtained using a one-pot procedure starting from the intramolecular reductive cyclization of bis(alkynyl)silane [365]. A water-soluble complex prepared from PdCl 2 and TPPMS catalyzes the polymerization in aqueous media to provide a rigid-chain polyelectrolyte (251) which is soluble in aqueous Na 2 CO 3 [366].…”