《Total scattering reveals the hidden stacking disorder in a 2D covalent organic framework》 was published in Chemical Science in 2020. These research results belong to Puetz, Alexander M.; Terban, Maxwell W.; Bette, Sebastian; Haase, Frederik; Dinnebier, Robert E.; Lotsch, Bettina V.. HPLC of Formula: 623-00-7 The article mentions the following:
Interactions between extended π-systems are often invoked as the main driving force for stacking and crystallization of 2D organic polymers. In covalent organic frameworks (COFs), the stacking strongly influences properties such as the accessibility of functional sites, pore geometry, and surface states, but the exact nature of the interlayer interactions is mostly elusive. The stacking mode is often identified as eclipsed based on observed high symmetry diffraction patterns. However, as pointed out by various studies, the energetics of eclipsed stacking are not favorable and offset stacking is preferred. This work presents lower and higher apparent symmetry modifications of the imine-linked TTI-COF prepared through high- and low-temperature reactions. Through local structure investigation by pair distribution function anal. and simulations of stacking disorder, we observe random local layer offsets in the low temperature modification. We show that while stacking disorder can be easily overlooked due to the apparent crystallog. symmetry of these materials, total scattering methods can help clarify this information and suggest that defective local structures could be much more prevalent in COFs than previously thought. A detailed anal. of the local structure helps to improve the search for and design of highly porous tailor-made materials. The results came from multiple reactions, including the reaction of 4-Bromobenzonitrile(cas: 623-00-7HPLC of Formula: 623-00-7)
4-Bromobenzonitrile(cas: 623-00-7) is classified as organic nitriles, which are commonly use solvents and are reacted further for various applications such as manufacture of polymers and intermediates for pharmaceuticals and other organic chemicals,HPLC of Formula: 623-00-7 It can also be used as an aryl halide test compound in developing greener reaction conditions for Suzuki cross-coupling between aryl halides and phenyl boronic acid.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts