Elucidation of the layered structures of AMO solvent-washed Mg-Al layered double hydroxides using Mg- and Al K-edge XANES and EXAFS: Impacts of washing solvents on structures and catalytic esterification of benzoic acid with 2-ethylhexanol to 2-ethylhexyl benzoate was written by Kuljiraseth, Jirayu;Wangriya, Aunchana;Klysubun, Wantana;Jitkarnka, Sirirat. And the article was included in Radiation Physics and Chemistry in 2020.Recommanded Product: 2-Ethylhexyl benzoate The following contents are mentioned in the article:
Recently, aqueous miscible organic-layered double hydroxides (AMO-LDHs) have been found to possess impressively-enhanced surface area and pore volume Although computer simulations were adopted to understand the interaction between an AMO solvent and an LDH, their layered structures have not yet been clearly depicted. Therefore, in this work, Mg- and Al K-edge X-ray absorption spectroscopy (XAS), in association with characterization techniques such as XRD, BET, TEM, and STA-FTIR, were employed to visualize the layered structures in the at. level of AMO-LDHs synthesized using two AMO solvents; that are, ethanol and acetone. XANES revealed that Mg (II) and Al (III) had octahedral coordination with oxygen atoms, whereas EXAFS revealed that the coordination numbers of Mg-O and Al-O bonds in the ethanol-washed LDH were distinguished from those of acetone- and water-washed LDHs. In addition, the radial distribution around cations of Mg-O-Al bonds in the layers was different from that in the conventional LDH, due to the differences in charge balance between the LDH sheets and AMO solvents. The illustrations of AMO-LDH layered structures were then constructed, in association with the information from the Mol. Dynamic simulation. As a result, the linear combination fitting based on the Mg K-edge XANES results showed that the change in phase composition of AMO-LDHs was attributed to the significantly-enhanced surface area, acid d., and base d., and consequently to the catalytic activity of AMO LDH-derived mixed oxides on the esterification of benzoic acid, a major component in chem. wastes, with 2-ethylhexanol to valuable 2-ethylhexyl benzoate. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 2-Ethylhexyl benzoate).
2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Recommanded Product: 2-Ethylhexyl benzoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics