Blue Electroluminescence from Poly(p-phenylene) Solubilized by Perfluoropropylation

Abstract

Perfluoropropylation of poly(p-phenylene) (PPP) was carried out with the intention of obtaining soluble PPP dervatives. The resulting polymers were chracterized by UV/vis and IR spectroscopy. An electroluminescent device emitting blue-green light depending on the bias voltage was fabricated from this polymer.

Electroluminescent Conjugated Polymers—Seeing Polymers in a New Light

“…Despite the regioregularity and low polydispersity of the resulting polymer 74, there are only limited reports on the electroluminescence of PPP derived from it. Much interest concentrates also on solution-processible poly(para-phenylene)s made soluble by suitable alkyl, aryl, alkoxy, or perfluoroalkyl [228] solubilizing groups. PPP derivatives with solubilizing alkyl side chains are the most important, and these are available through transition-metal-catalyzed polycondensations (reviewed by Schlüter and Wegner [229] ), especially the Suzuki coupling of arylboronic acids and bromoarenes (optimized by Wegner et al [230±232] ), and the nickel-catalyzed coupling of substituted dihalobenzenes (reviewed by Yamamoto [233] ), hydroquinone bistriflates, [234] or bis(mesylates).…”

Synthesis of Fluorinated and Hydrocarbon Ester Functionalized Poly(p-phenylenes) and Their Solubility in Supercritical Fluids

“…2 Within the past decade, there has been increased attention directed at designing highly functionalized and processable poly(phenylenes) due to the many highperformance applications proposed for these type of polymers. 3 Functionalized poly(phenylenes) are now readily synthesized in high yields and often as high molecular weight materials by homo-or cross-coupling reactions that are typically nickel-or palladiumcatalyzed. 4 Functionalization of the PPP backbone is necessary to ensure polymer solubility for synthesis as well as for the later processing of these materials.…”

An efficient electroluminescence copolymer based on vinyl‐linked donor–acceptor system

“…25,26 The optical band gaps (E g ) of the polymer are calculated according to the formula: ahm ¼ B (hm À E g ) n , where a is the absorbance coefficient, h is the Planck constant, and n (the value is 0.5) is the transition type, respectively. 27 By drawing the (hmA) 2 À hm curves and extending the linearity edge of absorbance to intersect with energy axis, then the band gap is obtained to be 2.52 eV, about 10% higher than that of P3,4DOOT (2.27 eV 28 ) in solid film.…”