Combining Defects in a Single Nanographene: A Fully Helical Saddle Ribbon
MetadataShow full item record
AuthorCruz, Carlos M.; Castro-Fernández, Silvia; Macoas, Ermelinda; Millán, Alba; González Campaña, Araceli
nanographenesheliceneschiralitypolycyclic aromatic hydrocarbonschiroptical properties
Cruz, Carlos M. [et a.]. Combining Defects in a Single Nanographene: A Fully Helical Saddle Ribbon. Synlett, 2019, 30, A-F
SponsorshipThis work was supported by the European Research Council (ERC) under the European Union´s Horizon 2020 research and innovation program (ERC-2015-STG-677023) and the Ministerio de Economía y Competitividad (Spain) (CTQ2015-70283-P, BES-2016-076371, IJCI2016-27793 and RyC-2013-12943). E.M. thanks the Fundação para a Ciência e a Tecnologia for financial support (UID/NAN/50024/2013 and IF/00759/2013) ()
The controlled preparation of well-defined distorted nanographenes by a bottom-up approach based on organic synthesis permits the direct establishment of unprecedented structure–property relationships in carbon nanostructures. The simultaneous incorporation of various defects in nanographenes affords highly curved structures with novel or enhanced photophysical properties. In this sense, we recently reported a fully helical and saddle-shaped nanographene ribbon containing the first undecabenzohelicene unit. Both its linear and nonlinear optical properties are enhanced in comparison with those of other partially π-extended helicenes. Moreover, the new superhelicene exhibits the highest emission dissymmetry factor (glum) reported to date for a homochiral nanographene. The combination of both nonlinear and chiroptical properties in nanographenes opens up new possible future applications for those distorted nanostructures.