Zhang H, Wan X, Xue X, Li Y, Yu A, Chen Y. Selective tuning of the HOMO- LUMO gap of carbazole-based donor-acceptor-donor compounds toward different emission colors. Eur J Org Chem 2010;9:1681e7.Zhang H, Wan X, Xue X, Li Y, Yu A, Chen Y. Selective tuning of the HOMO- e...