A Journey into the Determination of Polyaniline Molecular Weight

Abstract

Over the last decades, the construction and design of conducting polymer-based materials have received a huge attention due to their special physico-chemical characteristics making them very useful and alternative materials in various fields. Among intrinsically conducting polymers, polyaniline (PANI) has been widely used and a pool of scientific research has been done to improve its properties and/or to combine it with other materials to get multifunction materials with enhanced efficiency. However, the scarce information is available to date on its molecular weight (Mw) limits obtaining structural information. In fact, owing to the poor solubility of the material the most part of the results concerns dimeric and oligomeric species, whereas a complete characterization of the longest chains is still far away. Since the synthetic strategies used to produce PANI critically affect its properties and chemical-physical characteristics, included Mw, the present work summarizes the most common methods applied for PANI synthesis and the different analytical approaches used to determine the Mw of the polymer and of its oligomers, in order to stimulate further investigation that can contribute to widen the information on this unique polymer.

Production of green hydrogen by efficient and economic electrolysis of water with super-alloy nanowire type electrocatalysts

“…The unique performance of Re-containg catalysts has been found and developed in our previous work for the hydrogen production and utilization. The Re-containing catalysts are used for the following chemical processes [20][21][22][23][24][25][26][27][28][29][30][31][32] : i) hydrogen and aromatics production from methane reaction with CO/CO 2 ; ii) hydrogen production from methane reaction with water; iii) syngas production from methane reaction with CO 2 ; iv) hydrogen production from water splinting, V) Hydrogenation of aromatics. The above mentioned Re-containg catalysts have been successfully applied in the practical chemical and electrochemical process.…”