Fusible Conducting Poly(9-alkylfluorene) and Poly(9,9-dialkylfluorene) and Their Characteristics

Abstract

Conducting poly(9-alkylfluorene) and poly(9,9-dialkylfluorene) with long alkyl chains have been prepared and found to be fusible at relatively low temperature. Unlike in poly(3-alkylthiophene), electrical conductivity and band gap energy do not change remarkably at the solid-liquid phase transition. These polymers also demonstrate drastic changes of optical and electrical properties upon doping.

Progress with Light-Emitting Polymers

“…[59,60] To improve regiospecificity and minimize branching, Dow researchers have accessed these homopolymers through transition-metal-catalyzed reactions of monomeric 2,7-dihalogenated fluorenes. The palladium-catalyzed synthesis of mixed biphenyls from phenylboronic acid and aryl bromide discovered by Suzuki and co-workers [61] is tolerant of a large variety of functional groups, is insensitive to the presence of water, is truly catalytic in metallic reagents, and can be used to prepare perfectly alternating copolymers.…”

Polyfluorene Homopolymers: Conjugated Liquid-Crystalline Polymers for Bright Blue Emission and Polarized Electroluminescence

“…1.2 vs Ag, [21] which was further translated into an absolute energy of 5.5 eV vs vacuum. [22] However, the absolute locations of the electronic levels are still subject to controversial discussion and further details are presented in Chapter 3.2.…”

Oligomers and Polymers Based on Bridged Phenylenes as Electronic Materials

“…In the first synthesis of a PDAF, dihexylfluorene 24 was coupled oxidatively using iron(III) chloride as oxidant. [67,68] The resulting polymer 4a had only a modest molecular mass of 5 000 g Á mol À1 (n % 20)…”