Retraction: Transition-metal-free synthesis of conjugated microporous polymers: Via amine-catalyzed Suzuki-Miyaura coupling reaction (Chem. Sci. (2021) DOI: 10.1039/d1sc03970a)

We, the named authors, hereby wholly retract this Chemical Science article. This article reports the synthesis of conjugated microporous polymers using an amine-catalyzed Suzuki Miyaura coupling reaction. This article builds upon findings first reported by Xu et al. and invokes the same mechanism for Pd-free polymer synthesis. Since the publication of our article in Chemical Science, we have been made aware of concerns regarding the conclusions of the above-mentioned Nature Catalysis article, disputing the mechanisms and claims that the reactions reported are not Pd-free. We, as the authors of this Chemical Science article, have considered these claims and, after further investigation, acknowledge that we cannot exclude the influence of residual Pd for the Suzuki coupling reaction involved. Therefore, there is sufficient doubt around the main conclusion of our work as a transitionmetal- free synthesis and so we wish to retract this article.