▎ 摘　　要

NOVELTY - Preparing graphene nanoribbons having fluorescence emission, comprises e.g. adding 1-(4-bromophenyl)-2-{3-5-(4-bromophenyl)-4-(4-methylphenyl)-2,3-diphenylphenylphenyl}-5-{3-6-(4-bromophenyl)-4-methyl-2,3-diphenylphenylphenyl}-3,4-diphenylbenzene compound (I), pyreneboronic acid pinacol ester, toluene and deionized water into reaction vessel, adding potassium carbonate, methyl trioctylammonium chloride and catalyst into first solution, and (ii) adding 2-4-(5-{3-4-(3-{4-methyl-2,3-diphenyl-6-4-(pyren-2-yl)phenylphenyl}phenyl)-2,3-diphenyl-6-4-(pyren-2-yl)phenylphenylphenyl}-2-(4-methylphenyl)-3,4-diphenylphenyl)phenylpyrene compound (II) and dichloromethane into reaction vessel, degassing, adding into second mixed solution, and post-processing. USE - The method is useful for preparing graphene nanoribbons having fluorescence emission. ADVANTAGE - The graphene nanoribbons have precise structure and in-situ modification of edge pyrene fluorescent groups, dodecyl carbon chains, excellent dispersion and long-term stability in the liquid phase, and excellent dispersibility and operability of fluorescent graphene nanoribbons. DETAILED DESCRIPTION - Preparing graphene nanoribbons having fluorescence emission, comprises (i) providing 1-(4-bromophenyl)-2-{3-5-(4-bromophenyl)-4-(4-methylphenyl)-2,3-diphenylphenylphenyl}-5-{3-6-(4-bromophenyl)-4-methyl-2,3-diphenylphenylphenyl}-3,4-diphenylbenzene compound of formula (I), adding (I), pyreneboronic acid pinacol ester, toluene and deionized water into the reaction vessel and mixing evenly, adding potassium carbonate to obtain the first solution, stirring under the protection of inert gas, quickly adding methyl trioctylammonium chloride and catalyst into the first solution after degassing to obtain the first mixed solution, heating under the protection of inert gas for at least 24 hours, collecting organic phase, working up to obtain brown solid i.e. 2-4-(5-{3-4-(3-{4-methyl-2,3-diphenyl-6-4-(pyren-2-yl)phenylphenyl}phenyl)-2,3-diphenyl-6-4-(pyren-2-yl)phenylphenylphenyl}-2-(4-methylphenyl)-3,4-diphenylphenyl)phenylpyrene compound of formula (II), and (ii) adding (II) and dichloromethane into reaction vessel to obtain second mixed solution, degassing, and then dissolving iron(III) chloride in nitromethane, adding it dropwise into the second mixed solution under an inert gas atmosphere, stirring, and continuously bubbling inert gas at room temperature for at least 3 days, and post-processing to obtain graphene nanoribbon compound of formula (III) as a black solid. R = substituent on the benzene ring (straight-chain carbon dodecyloxy group); and Substituent = H, OH, aralkoxy, substituted aralkoxy, straight-chain alkoxy, branched alkoxy, cyclic alkoxy, heteroalkoxy, unsaturated alkoxy or ester group. An INDEPENDENT CLAIM is also included for graphene nanoribbons having fluorescence emission obtained by above method.