Extended Data Fig. 1: Mass spectroscopy analysis and confirmation of livingness of APEX polymerization.
From: RETRACTED ARTICLE: Living annulative π-extension polymerization for graphene nanoribbon synthesis
a, MALDI–TOF mass spectrum (reflection mode) of fjord-type GNR 2 (M n = 1.3 × 104, Đ = 1.23) with trans-2-[3-(4-tert-butylphenyl)-2-methyl-2-propenylidene]malononitrile (DCTB) as the matrix. b, Summary of observed and calculated molecular ion peaks. c, Confirmation of livingness of APEX polymerization by one-pot SEC analyses. d, SEC charts of the reaction progress after 1 h, 3 h and 12 h.
