On July 12, 2022, Kleybolte, Moritz E.; Vagin, Sergei I.; Rieger, Bernhard published an article.Application of 146370-51-6 The title of the article was High-Molecular-Weight Bisalkoxy-Substituted Poly(para)phenylenes by Kumada Polymerization. And the article contained the following:
Substituted poly(para)phenylenes (PPPs) are conjugated polymers with an attractive application potential in various fields of materials science. They are synthesized nearly exclusively using catalytic cross-coupling polymerization reactions based on Pd- or Ni-catalysts. Among these synthetic approaches to access alkoxy-substituted PPPs, Kumada catalyst transfer polymerization (KCTP or GRIM polymerization) would offer certain economic advantages over Suzuki-type polymerization as it relies on the utilization of a non-precious metal for catalysis. It also results in less total costs of the utilized reagents, avoiding addnl. preparative steps such as synthesis, isolation, and purification of boronic acid derivatives necessary for the Suzuki reaction. In fact, KCTP is nowadays the state-of-the-art method for the synthesis of polythiophenes. However, the application of KCTP for the synthesis of alkoxy-substituted PPPs leads to polymers with low mol. weights, limiting their practical applicability. Here, we developed a synthesis protocol that resulted in MEH-PPP with a mol. weight of Mn = 133 kg/mol and BHex-PPP with Mn = 153 kg/mol relative to polystyrene, outperforming the previous state of the art by a factor more than 5. Also, a tetra(ethylene glycol)-substituted PPP has been prepared by this procedure, with a mol. weight exceeding the previously reported results for analogous structures. Such mol. weights can be obtained in a reasonable reaction time (5 days) using low concentrations of an N-heterocyclic carbene-coordinated Ni complex. The polymerization kinetics suggested a chain-growth mechanism with a chain transfer step. The latter is caused most likely by a bimol. interaction of the Ni-species at the polymer chain ends. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Application of 146370-51-6
The Article related to bisalkoxy polyphenylene kumada polymerization, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Application of 146370-51-6
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