Polyfluorene
![](/Images/godic/202502/03/Polyfluorene.svg2517.png")
![The fluorene molecule is most commonly linked at the 2 and 7 positions in polyfluorene derivatives. Also, the 9 position is typically where side chains are attached.](/Images/godic/202502/03/Fluorene_numbered2517.png")
![This is the photoluminescence of two very similarly structured polyfluorene derivatives. The one on the left (purple) is a copolymerization of a fluorene derivative, benzene and oxadiazole molecules and the one on the right (light green) has the structure directly below this image.](/Images/godic/202502/03/Polyfluorene_derivative_luminescence2517.jpg")
![This polyfluorene derivative photoluminesces light green (the vial on the right in the image above), the alcohol (-OH) side chains can participate in ESIPT with the neighboring oxadiazole nitrogens causing a red-shifted emission. The meta-linkages in the backbone impart solubility in lieu of multiple side chains.](/Images/godic/202502/03/Polyfluorene_with_ESIPT2517.png")
Polyfluorenes are a class of polymeric materials. They are of interest because similar to other conjugated polymers, they are currently being investigated for use in light-emitting diodes, field-effect transistors, and plastic solar cells. They are not a naturally occurring material, but are designed and synthesized for their applications. Modern chemistry has enabled adaptable synthesis and control over polyfluorenes that has facilitated use in many organic electronic applications.