By courtesy of:
Matthias Bremer, Detlef Pauluth, Melanie Klasen-Memmer
US 7087272, 2006, assigned to Merck Patent GmbHÂ
Nonfluorinated:
Blue Electroluminescent Materials for Polymer Light-Emitting Diodes
Wei Huang, Wang Lin Yu, Jian Pei, Soo Jin Chua
US 6887972, 2005, assigned to Agency for Science, Technology and Research
Semi-fluorinated:
Conjugated Polymers Containing Special Fluorene Structural Elements with Improved Properties
Hubert Spreitzer, Heinrich Becher, Willi Kreuder
US 6653438, 2003, assigned to Covion Organic Semiconductors GmbH
And an early one:
 2,7-aryl-9-substituted fluorenes and 9-substituted fluorene oligomers and polymers
Woo, Edmund, P; Inbasekaran, Michael; Shiang, William, R; Roof, Gordon, R.
WO 9705184a1, 1997, assigned to Dow Chemical