Processable Rylene Diimide Dyes up to 4 nm in Length: Synthesis and STM Visualization

Abstract
Long and planar: Facile syntheses of soluble hexarylene diimides (HDI) and octarylene diimides (ODI) are described. They are stable in both solution and the solid state and exhibit broad and intense NIR absorption. Scanning tunneling microscopy (STM) reveals that HDI, after deposition from solution, forms a unique herringbone bilayer or stable multilayers depending on the concentration.

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