Synthesis and Characterization of alternating polymers incorporating boron-chelated heterochrysene units
writer：Hailei Zhang, Shuli Ma, Dongqin Li, Yonggang Wu and Xinwu Ba*
keywords：π-conjugation polymers; boron-chelated; heterochrysene; fluorescence properties
source：期刊
specific source：Polymers
Issue time：2015年
The novel boron-chelated π-conjugated polymers named as BF2-poly and BPh2-poly were synthesized by a feasible condensation-chelation strategy. First, conjugated polymers bearing Boc group were prepared by using palladium-catalyzed Suzuki-Miyaura coupling reaction. Then, conjugated polymers (poly-1) were obtained with high efficient by removing the Boc group from Boc-poly. Last, boron trifluoride diethyl etherate (BF3·Et2O)
or triphenylboron (BPh3) chelated with poly-1 forming the target polymers. Furthermore, the boron-chelated polymers were characterized by UV?vis absorption spectroscopy, photoluminescence spectroscopy, cyclic voltammetry and thermogravimetric analysis. As expected, fluorescences peaked at 520 nm and 592 nm were observed in diluted CH2Cl2.
In addition, BF2-poly and BPh2-poly showed strong fluorescence at 545 nm and 601 nm in homogeneous the solid state. The results coming from thermogravimetric analysis and cyclic voltammetry also revealed that the conjugated polymers have the favorable electrochemical and thermostable properties.