On March 19, 2020, Pirez, Cyril; Nagashima, Hiroki; Dumeignil, Franck; Lafon, Olivier published an article.Product Details of 5036-48-6 The title of the article was Probing Functionalities and Acidity of Calcined Phenylene-Bridged Periodic Mesoporous Organosilicates Using Dynamic Nuclear Polarization NMR, Diffuse Reflectance Infrared Fourier Transform Spectroscopy, and X-ray Photoelectron Spectroscopy. And the article contained the following:
Owing to their high surface area, their high stability, and their hydrophobicity, periodic mesoporous organosilica (PMO) materials represent promising catalytic support for environmentally friendly chem. processes in water. We investigate here how the calcination of PMO material with benzene linkers (PMOB) allows its functionalization. Conventional and dynamic nuclear polarization (DNP)-enhanced NMR spectroscopy, diffuse reflectance IR Fourier transform spectroscopy, and XPS prove that calcination at 450°C results in the oxidation of phenylene bridges into (poly)phenols but also into carboxylic acids. Ketone, aldehyde, as well as allyl and aliphatic alc. functionalities are also observed, but their amount is much lower than that of carboxylic acids. The calcination also cleaves the Si-C bonds. Nevertheless, N2 adsorption-desorption measurements, powder X-ray diffraction, and transmission electron microscopy indicate that the PMOB materials calcined up to 600°C still exhibit ordered mesopores. We show that the phenol and carboxylic acid functionalities of PMOB calcined at 450°C protonate the NH2 group of 1-(3-aminopropyl)imidazole (API) in water at room temperature, but no formation of a covalent bond between API and the calcined PMOB functionalities has been detected. The experimental process involved the reaction of N-(3-Aminopropyl)-imidazole(cas: 5036-48-6).Product Details of 5036-48-6
The Article related to organosilica surface acidity calcination, Surface Chemistry and Colloids: Solid-Gas Systems and other aspects.Product Details of 5036-48-6
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem