The preparation of the 3,6-disubstituted dibenzosilole monomers 4, 5 and 10 by two different routes is described; Suzuki opolymerisation afforded poly(9,9-dioctyl-3,6-dibenzosilole) 11 which has a sufficiently high triplet energy (2.55 eV) to function as a host for green electrophosphorescent emitters.
Chan, K. L., Watkins, S. E., Mak, C. S. K., McKiernan, M. J., Towns, C. R., Pascu, S. I., & Holmes, A. B. (2005). Poly(9,9-dialkyl-3,6-dibenzosilole) - a high energy gap host for phosphorescent light emitting devices. Chemical Communications, 2005(46), 5766-5768. https://doi.org/10.1039/b511208g