Easily Changing an Organic Dye

  • Author: David Peralta
  • Published Date: 13 September 2014
  • Source / Publisher: ChemistryOpen/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Easily Changing an Organic Dye

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Organic dyes are important components of liquid crystal displays, solar panels and organic light-emitting diodes. Perylene bisimides are examples of such dichroic dyes, meaning their absorption at a specific wavelength can change from low to high depending on their molecular orientation and assembly.

Albertus P. H. J. Schenning, Eindhoven University of Technology, Netherlands, and colleagues modified the organic dye peryline bismide PB-1 (pictured) in one step, thereby changing its alignment and self-assembly properties. The researchers also showed the first instance of formation of ultra-long dye fibers for these perylene bisimides. Four phenylethyl groups were added to PB-1 by Ru(H2)(CO)(PPh3)3 in a single step.
This simple modification increased the dye's solubility, reversed its dichroic properties and affected its self-assembly. These changes may be interesting for the tuning properties of optoelectronic devices.


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