Abstract
Electrochemical polymerisation is reported to be a method for readily producing copolymers of various conjugated molecules. We employed this method for mixtures of indole, carbazole or fluorene with 3-hexylthiophene (HT), in order to obtain their soluble copolymers. Although polymer films were obtained, infrared (IR) and Raman investigations showed that instead of the expected linear copolymers, polyindole and polycarbazole N-substituted with HT, as well as a poly(3-hexylthiophene) (PHT)/polyfluorene blend were produced instead. Boron trifluoride diethyl etherate was also used in an attempt to promote copolymerisation, but the produced deposits were found to be highly degraded.
Highlights
IntroductionThe quest of fabricating ever newer generations of optoelectronic devices, inherently leads to greater requirements in terms of material properties
Materials based on conjugated polymers have found wide commercial application, in the development of electrochromic devices (ECDs) [1,2], photovoltaic (PV) cells [3] and organic field effect transistors (OFETs) [4] due to their beneficial electronic and mechanical properties [5,6,7,8,9,10].The quest of fabricating ever newer generations of optoelectronic devices, inherently leads to greater requirements in terms of material properties
When indole and carbazole are polymerised in the presence of HT, the signals associated with the N−H bond are either largely diminished or completely extinguished
Summary
The quest of fabricating ever newer generations of optoelectronic devices, inherently leads to greater requirements in terms of material properties This in turn fuels the search for new systems, well-evidenced by the number of reports concerning novel conjugated moieties. Many valiant research efforts have been aimed at exploring an alternative approach—developing new qualities based on existing, well-investigated systems. One aspect of this approach is to blend the qualities of two or more conjugated units within a single layer, giving rise to polymer blends and copolymers [10,11,12,13,14,15,16]
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