Reversible constitutional switching between macrocycles and polymers induced by shape change in a dynamic covalent system was written by Ulrich, Sebastien;Buhler, Eric;Lehn, Jean-Marie. And the article was included in New Journal of Chemistry in 2009.Name: 2-Bromopyridine-4-methanol This article mentions the following:
Morphol. switches were developed as a tool that can be used in constitutional dynamic chem. (CDC) to control the constitution of the whole dynamic system. Mols. that have well-defined but switchable shapes were designed and synthesized. Their restrained conformational states were characterized both in the solid and in solution The addition of metal ions induces a shape change through coordination; the shape generated was also fully studied both in the solid and in solution Such mols. constitute morphol. switches, meaning that they can explore various shape states as a result of controlled well-defined shape changes triggered by an effector. These morphol. switches were then integrated into covalent dynamic systems through formation of reversible imine bonds. Thermodn. and kinetic analyses were performed to quantify the covalent equilibrium and to study the labile character of the covalent reversible link. It was then demonstrated that the mol. shape state of the morphol. switches induces a well-defined constitution through covalent self-assembly, and that the system can be steered, quant. and reversibly without significant fatigue, between two different constitutional states, resp., polymeric and macrocyclic assemblies. The dynamic covalent polymeric assemblies were analyzed by DOSY NMR and small angle neutrons scattering (SANS). Their dynamic behavior as a function of the concentration and the temperature was demonstrated and characterized. In the experiment, the researchers used many compounds, for example, 2-Bromopyridine-4-methanol (cas: 118289-16-0Name: 2-Bromopyridine-4-methanol).
2-Bromopyridine-4-methanol (cas: 118289-16-0) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.Name: 2-Bromopyridine-4-methanol
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts