Electroactive and bioactive films of random copolymers containing terthiophene, carboxyl and Schiff base functionalities in the main chain

Abstract

A new bis-thienyl type monomer with preformed azomethine linkages (AzbT) was chemically synthesized and, subsequently, electro-copolymerized with 2,2′:5′,2′′-terthiophene (Th 3 ). AzbT:Th 3 mixtures with different molar ratios (i.e. 50:50, 60:40 and 80:20) were considered, the resulting thin films being made of random insoluble copolymers, P(AzbT-co-Th 3 )s. The content of AzbT in P(AzbT-co-Th 3 )s was found to increase with the AzbT:Th 3 molar ratio in the electropolymerization medium. Furthermore, characterization of the different copolymers suggests the existence of several concomitant processes in the reaction medium. Thus, depending on the composition of the reaction medium, AzbT worked as a co-monomer and/or as a dopant for the growing polymer chains. The morphology of the films evolved from a porous multi-level surface to a more compact and flat globular structure with increasing AzbT content. On the other hand, the electrochemical and optical properties were also

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Electroactive Composite of FeCl3‐Doped P3HT/PLGA with Adjustable Electrical Conductivity for Potential Application in Neural Tissue Engineering

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An amphiphilic, heterografted polythiophene copolymer containing biocompatible/biodegradable side chains for use as an (electro)active surface in biomedical applications

“…As it can be seen, the optical properties of the PTh backbone, were considerably affected by the presence of caprolactone oligomer side chains. In Figure 3a, a clear, sharp absorption band which is usually find in polythiophenes around 400 nm, attributable to conjugated main chain, 42 is missing and only three small shoulders are distinguishable at 370, 400 and 470 nm (inset). This means that in the investigated acetone solution (dispersion) at least three types of chromophores exist, that most probable could be polythiophene chains with different conjugation chain length.…”