On November 21, 1994, Reichert, Veronica R.; Mathias, Lon J. published an article.Formula: C34H28I4 The title of the article was Tetrahedrally-Oriented Four-Armed Star and Branched Aramids. And the article contained the following:
Palladium-catalyzed carbonylation of 4-iodoaniline in the presence of 1,3,5,7-tetrakis(4-iodophenyl)adamantane or 1,3,5,7-tetrakis(4-aminophenyl)adamantane cores gave the corresponding four-armed star polybenzamides. Tetraphenyladamantane incorporation was confirmed by 13C solution and solid-state CP/MAS NMR and FTIR. The stars exhibited the same thermal stability as linear polybenzamide synthesized by the same route. The star with the amine core exhibited the highest intrinsic viscosity in sulfuric acid ([畏] = 0.74 dL/g), and films could be cast from dilute DMAC-5% LiCl solutions Tetraphenyladamantane incorporation (confirmed by solid-state CP/MAS 13C NMR and FTIR) significantly increased solubility Branched aramids synthesized from 3,5-dibromoaniline under Pd-catalyzed carbonylation conditions were compared to a branched system based on 1,3,5,7-tetrakis(4-iodophenyl)adamantane. The former were insoluble, while the adamantane materials were slightly soluble in DMAC and H2SO4; both hyperbranched polymers tenaciously held residual solvent and could not be completely dried. These results confirm both the incorporation of the tetrasubstituted adamantyl core into both star and hyperbranched polymers and the possibility of property modification through disruption of chain packing and enforced tetrahedral arm orientation at the core. The experimental process involved the reaction of 1,3,5,7-Tetrakis(4-iodophenyl)adamantane(cas: 144970-30-9).Formula: C34H28I4
The Article related to adamantane catalyst polycondensation iodoaniline, polyamide star preparation adamantane core, aramid star preparation tetrakisiodophenyladamantane, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Formula: C34H28I4
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com