Amorphous fluorescent organic emitters for efficient solution-processed pure red electroluminescence: synthesis, purification, morphology, solid-state photoluminescence, and device characterizations

J Org Chem. 2007 Oct 26;72(22):8580-3. doi: 10.1021/jo7014517. Epub 2007 Sep 21.

Abstract

New soluble and intrinsic amorphous red emitters 1 and 2 were obtained by Suzuki coupling. Due to the close molecular polarities, separation of target products from monocoupling impurities presents a challenge. The results showed highly pure 2 would be a potentially valuable fluorophore for solution-processed pure red electroluminescence in terms of visual sensitivity with respect to 1.