Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.220000-87-3, Name is 4-Chloro-N-methylpicolinamide, SMILES is ClC1=CC=NC(=C1)C(=O)NC, belongs to pyridine-derivatives compound. In a document, author is Evans, Austin M., introduce the new discover, Category: pyridine-derivatives.
Emissive Single-Crystalline Boroxine-Linked Colloidal Covalent Organic Frameworks
The synthesis of periodic two-dimensional (2D) polymers and characterization of their optoelectronic behaviors are challenges at the forefront of polymer chemistry and materials science. Recently, we showed that layered 2D polymers known as 2D covalent organic frameworks (COFs) can be synthesized as single crystals by preparing COF particles as colloidal suspensions. Here we expand this approach from the condensation of boronic acids and catechols to the dehydrative trimerization of polyboronic acids. The resulting boroxine-linked colloids are the next class of 2D COFs to be obtained as single-crystalline particles, as demonstrated here for four 2D COFs and one 3D COF. Colloidal stabilization enables detailed structural analysis by synchrotron X-ray diffraction and high-resolution transmission electron microscopy. Solution fluorescence spectroscopy revealed that the COF crystallites are highly emissive compared to their respective monomer solutions. Excitation-emission matrix fluorescence spectroscopy indicated that the origin of this enhanced emission can be attributed to through-space communication of chromophores between COF sheets. These observations will motivate the development of colloidal COF systems as a platform to organize functional aromatic systems into precise and predictable assemblies with emergent properties.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 220000-87-3 is helpful to your research. Category: pyridine-derivatives.
Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem