A novel type of dibenzothiophene [b]-fused core-expanded azaBODIPYs were obtained through an efficient post-functionalization of tetrabrominated azadipyrro-methenes, using CuI-catalyzed cyclization, followed by BF2 complexation. These dyes show nearly planar skeletons, strong NIR absorption with maximum peaks up to 733 nm, and remarkable low-lying LUMO level of -4.15 eV. The field-effect transistor based on 1b exhibits bipolar transport properties, with the highest electron and hole mobilities up to 0.012 and 0.046 cm(2)V(-1)s(-1) respectively.
Synthesis, Structure, and Properties of Near-Infrared [<i>b</i>
]Phenanthrene-Fused BF<sub>2</sub>
Azadipyrromethenes
作者:Jiuen Cui、Wanle Sheng、Qinghua Wu、Changjiang Yu、Erhong Hao、Petia Bobadova-Parvanova、Marie Storer、Abdullah M. Asiri、Hadi M. Marwani、Lijuan Jiao
DOI:10.1002/asia.201700876
日期:2017.9.19
phenanthrene‐fused BF2 azadipyrromethene (azaBODIPY) dyes have been synthesized through a tandem Suzuki reaction and oxidative ring‐fusion reaction, or a palladium‐catalyzed intramolecular C−H activation reaction. These phenanthrene‐fused azaBODIPY dyes are highly photostable and display markedly redshifted absorption (up to λ=771 nm) and emission bands (λ≈800 nm) in the near‐infrared region. DFT calculations and