A Trefoil Knotted Polymer Produced through Ring Expansion was written by Cao, Peng-Fei;Mangadlao, Joey;Advincula, Rigoberto. And the article was included in Angewandte Chemie, International Edition in 2015.Reference of 628-13-7 This article mentions the following:
A synthetic strategy is reported for the production of a trefoil knotted polymer from a copper(I)-templated helical knot precursor through ring expansion. The expected changes in the properties of the knotted polymer compared to a linear analog, for example, reduced hydrodynamic radius and lower intrinsic viscosity, together with an at. force microscopy (AFM) image of individual mol. knots, confirmed the formation of the resulting trefoil knotted polymer. The strategies employed here could be utilized to enrich the variety of available polymers with new architectures. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Reference of 628-13-7).
Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Reference of 628-13-7