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dc.contributor.authorSarkar, P.-
dc.contributor.authorDas, B.K.-
dc.contributor.authorChakraborty, D.-
dc.contributor.authorMuthamma, K.-
dc.identifier.citationJournal of Molecular Structure, 2019, Vol.1195, , pp.309-314en_US
dc.description.abstractSynthesis and structural features of helical nanographene molecules comprising of seven benzene rings are examined. Thus dibutyl-dicarboxylate functional [7]helicene and its two regioisomers, dinaphtho[1,2 a:1?,2? h]anthracene and naphtho[2,1 c]pentahelicene, have been synthesized in two steps through Perkin approach using napthalene-2-acetic acid and ortho- or meta-phthalaldehydes. The feasibility of this approach to construct sulfur doped twisted dithiaarenes is also investigated by using thiophene-3-acetic acid. While dithiaarenes from meta-phthalaldehyde remains challenging, synthesis and characterization of planar anthra[1,2 b:5,6 b']dithiophene and twisted 1,12-dithiapentahelicene is successful from ortho-phthalaldehyde. Conformational analysis with DFT calculation shows unique helicity preference in such doubly helical carbon nanostructures. Absorption and emission behavior of these ?-extended molecules shows enhanced conjugation. 2019 Elsevier B.V.en_US
dc.titleCarbohelicenes and thiahelicene from phthalaldehydes through Perkin approachen_US
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