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Near Length-Independent Conductance in Polymethine Molecular Wires

Gunasekaran, Suman ; Hernangómez-Pérez, Daniel ; Davydenko, Iryna ; Marder, Seth ; Evers, Ferdinand ; Venkataraman, Latha


Polymethine dyes are linear pi-conjugated compounds with an odd number of carbons that display a much greater delocalization in comparison to polyenes that have an even number of carbon atoms in their main chain. Herein, we perform scanning tunneling microscope based break-junction measurements on a series of three cyanine dyes of increasing length. We demonstrate, at the single molecule level, ...


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