Matern, Jonas; Baeumer, Nils; Fernandez, Gustavo published an article in 2021. The article was titled 《Unraveling Halogen Effects in Supramolecular Polymerization》, and you may find the article in Journal of the American Chemical Society.SDS of cas: 2510-22-7 The information in the text is summarized as follows:
Halogens play a crucial role in numerous natural processes and synthetic materials due to their unique physicochem. properties and the diverse interactions they can engage in. In the field of supramol. polymerization, however, halogen effects remain poorly understood, and investigations were restricted to halogen bonding or the inclusion of polyfluorinated side groups. Recent contributions from our group revealed that chlorine ligands greatly influence mol. packing and pathway complexity phenomena of various metal complexes. These results prompted us to explore the role of the halogen nature on supramol. polymerization, a phenomenon that remained unexplored to date. To address this issue, the authors designed a series of archetypal bispyridyldihalogen PtII complexes bearing chlorine (1), bromine (2), or iodine (3) and systematically compared their supramol. polymerization in nonpolar media using various exptl. methods and theory. The studies reveal a remarkably different supramol. polymerization for the three compounds, which can undergo two competing pathways with either slipped (kinetic) or parallel (thermodn.) mol. packing. The halogen exerts an inverse effect on the energetic levels of the two self-assembled states, resulting in a single thermodn. pathway for 3, a transient kinetic species for 2, and a hidden thermodn. state for 1. This seesaw-like bias of the energy landscape can be traced back to the involvement of the halogens in weak N-H···X hydrogen-bonding interactions in the kinetic pathway, whereas in the thermodn. pathway the halogens are not engaged in the stabilizing interaction motif but rather amplify solvophobic effects. After reading the article, we found that the author used 4-Ethynylpyridine(cas: 2510-22-7SDS of cas: 2510-22-7)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. SDS of cas: 2510-22-7