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https://idr.l1.nitk.ac.in/jspui/handle/123456789/10145
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. |
URI: | http://idr.nitk.ac.in/jspui/handle/123456789/10145 |
Appears in Collections: | 1. Journal Articles |
Files in This Item:
File | Description | Size | Format | |
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1 Carbohelicenes and thiahelicene.pdf | 1.05 MB | Adobe PDF | View/Open |
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