Please use this identifier to cite or link to this item:
Title: Carbohelicenes and thiahelicene from phthalaldehydes through Perkin approach
Authors: Sarkar, P.
Das, B.K.
Chakraborty, D.
Muthamma, K.
Issue Date: 2019
Citation: Journal of Molecular Structure, 2019, Vol.1195, , pp.309-314
Abstract: Synthesis 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.
Appears in Collections:1. Journal Articles

Files in This Item:
File Description SizeFormat 
1 Carbohelicenes and thiahelicene.pdf1.05 MBAdobe PDFThumbnail

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.