Synthesis, Properties, and Semiconducting Characteristics of BF 2 Complexes of β,β-Bisphenanthrene-Fused Azadipyrromethenes

Three novel π-extended BF complexes of β,β-bisphenanthrene-fused azadipyrromethenes containing nine fused rings have been synthesized on the basis of a tandem Suzuki coupling reaction on readily available 2,6-dibromoazaBODIPYs followed by an intramolecular oxidative aromatic coupling mediated by iron(III) chloride. These resultant BF complexes exhibit strong absorption (extinction coefficients up to 2.4 × 10 M cm ) and emission in the near-infrared (NIR) range (790-816 nm) with excellent photo and thermal stabilities. The hole mobility of the thin-film field-effect transistors of these dyes fabricated by a solution process reaches up to 0.018 cm V s .