Regioregular poly[3‐(4‐alkoxyphenyl)thiophene]s

Abstract

An easy synthetic procedure for soluble poly[3‐(4‐alcoxyphenyl)thiophene]s is reported. The polymers present a high regioregularity degree as determined by both UV–vis spectra and 1H and 13C NMR analysis. Furthermore, X‐ray powder diffraction analysis performed on films of the polymers suggests a π‐stacked packing structure of the macromolecules. Electrical characterization was performed on one of the synthesized polythiophenes on both undoped and doped (with FeCl3 or iodine) films. The conductivity and charge‐carrier mobility were assessed by current–voltage and field effect measurements. Well‐structured polymer films were obtained simply via spin coating from chloroform solutions and without the need of further processing, unlike other regioregular polythiophenes reported in the literature. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 1758–1770, 2007

Substrate temperature dependence of the structure of polythiophene thin films obtained by Matrix Assisted Pulsed Laser Evaporation (MAPLE)

“…This value is commonly reported for polythiophenes in solution or in regio-random solid-state films [18,26].…”

“…This last has already been reported and discussed in literature [18] for regio-regular POOPT. Alkyl-substituted aromatic or heteroaromatic polymers tend to crystallize in the π-stacked, lamellar structure, with the consequence that the main chain adopts a planar conformation with an increased effective conjugation length and longer wavelength absorption.…”

“…Hence, the film deposited by MAPLE on the cold substrate was obtained in a disordered structure of coiled molecules. The deposition of a more disordered film with a blue shift in absorption is unusual for POOPT which, contrary to POPT, when deposited from solution, even with a fast technique such as spin casting, is always in the 11 planar π-stacked form [18].…”

“…Regioregular H-T POOPT with mean molecular weight M n = 16500 was synthesised as specified elsewhere [18]. Chloroform solutions of POOPT (0.25% wt) were used as target solutions for MAPLE depositions.…”

Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete

“…It is worth noting that a number of studies have dealt with the tuning of chemical-physics properties of plastic materials in order to obtain eco-friendly materials and reduce energy requirements, for example in the realization of OLED, PLED or FET [3][4][5].…”