Wei, Li; Tang, Huali; Zou, Feihua; Cai, Mingzhong published their research in Polymer Bulletin (Heidelberg, Germany) in 2021. The article was titled 《Synthesis of novel aromatic polyamides containing cardo groups and triphenylphosphine oxide structures by a heterogeneous palladium-catalyzed carbonylation and condensation reaction》.Synthetic Route of C6H5IO The article contains the following contents:
Abstract: New aromatic polyamides containing cardo groups and triphenylphosphine oxide structures were synthesized by a heterogeneous palladium-catalyzed carbonylation and condensation of bis(4-(3-iodophenoxy)phenyl)phenylphosphine oxide (BIPPO), aromatic diamines bearing cardo groups, and carbon monoxide. Polycondensations were carried out in N,N-dimethylacetamide under 1 atm of CO at 120°C in the presence of a magnetically recyclable heterogeneous palladium catalyst and 1,8-diaza-bicyclo[5,4,0]-7-undecene (DBU) and afforded novel aromatic polyamides with inherent viscosities between 0.72 and 0.76 dL/g. All the polyamides were quite soluble in dipolar aprotic solvents and pyridine and could be converted into transparent, flexible, and tough polyamide films by casting from DMAc solutions These polymers exhibited high thermal and thermooxidative stability with the glass transition temperatures of 237°C-256°C, the temperatures at 5% weight loss of 448°C-465°C in air. All the phosphorus-containing polyamides self-extinguished as soon as the flame was removed, and the limited oxygen indexes (LOIs) of these polymers were in the range of 39%-44%. The polymer films also showed good mech. properties and high optical transparency. The experimental process involved the reaction of 3-Iodophenol(cas: 626-02-8Synthetic Route of C6H5IO)
3-Iodophenol(cas: 626-02-8) belongs to organic iodides.Synthetic Route of C6H5IO The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine.
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com