Effects on the Electrochemical and Electrochromic Properties of 3 Linked Polythiophene Derivative by the Introduction of Polyacrylate

By the oxidative coupling polymerization, a new polythiophene containing 1,2,4‐triazole heterocyclic group was synthesized in chloroform solvent using iron(III) chloride as an oxidant catalyst. Analyses of infrared (IR) and ultraviolet–visible (UV‐Vis) spectra confirmed that the polymerization reaction took place and the absorption band at 469 nm characterized for π–π* transition in the conjugated polymer. Morphology and surface properties of the polymer were studied by field emission scanning electron microscopy (FESEM). Polymer had relatively uniform size distribution. Based on thermal gravimetry analysis (TGA), polymer is without impurities and has an adequate thermal stability in air atmosphere when completely decomposed at 500 oC. The polymer exhibited fluorescence emissions at 596 nm corresponding to the conjugated chain in polymer. Polymer exhibited a good electrical conductivity in the undoped state (around 1.37E–7 S.cm‐1 at 1 MHz).

Synthesis and characterization of novel poly[4‐phenyl‐3‐(thiophen‐3‐ylmethyl)‐1H‐1,2,4‐triazole‐5(4H)‐thione]

Trung

Linh²,

Chinh

et al. 2019

Synthesis of polythiophene containing heterocycle on the side chain: A review

Linh¹,

Nguyen

Trung

2020

This review highlights some synthesis results of ionic and neutral conjugated polythiophenes containing heterocyclic moieties on side chain using oxidative or cross‐coupling polymerizations. Because of their increasing importance in material science, a lot of methods have recently been developed for their synthesis and modification. The review also reported out that conjugated polythiophenes exhibit special optical and electrical properties with high solubility in water making potential applications of these polymers from aqueous solutions, which can facilitate the preparation of the composites of these polymers. The art of designing side chains with various sizes, electronic properties and polarities was demonstrated to be necessary for fine‐tuning the solubility and other properties of polythiophenes, thereby enhancing their applications as advanced materials.

Fluorescent properties of some polythiophenes synthesized from 2‐(thiophen‐3‐yl)acetohydrazide and acetophenone

Linh

Hùng

Oanh

et al. 2020

In this study, new polythiophenes containing hydrazone groups from derivatives of acetophenone were synthesized by chemical oxidative coupling polymerization. Ultraviolet‐visible spectroscopy (UV‐Vis) combined with infrared (IR) analyses proved the supposed structure of novel polythiophenes and proved conformance of the expected synthetic method. Morphology and surface properties of the synthesized polymers were investigated by field‐emission scanning electron microscopy (FE‐SEM). Thermal gravimetry analysis (TGA) has been reported that there was still the presence of small FeCl3 catalyst in polymers and polymers had a stable thermal stability under air atmosphere. The polymers displayed fluorescence emissions at about 590 nm attributed to the π‐conjugated polythiophene. Polymers without doping have a good electrical conductivity (around 4.03×10–7 S/cm at 1 MHz).