On July 31, 2021, Harish, N.; Kathyayini, N.; Baby, Bindhu; Nagaraju, N. published an article.Application of 102-07-8 The title of the article was Investigation of active sites using solid state 27Al and 31P MAS NMR in ceramic amorphous aluminophosphate materials prepared from different potassium salts of phosphate for the synthesis of diphenyl urea derivatives. And the article contained the following:
Ceramic amorphous aluminophosphate (CAmAlP) catalysts were prepared by precipitation method using different phosphate salts of potassium such as KH2PO4, K4P2O7 and K2HPO4 as well as H3PO4. The prepared materials were characterized by PXRD, FT-IR, XPS, SEM, BET Surface area, NH3-TPD, 27Al NMR and 31P NMR anal. methods. The catalytic activity of the materials was checked in the synthesis of di-Ph urea (DPU) from aniline and di-Et carbonate, under refluxing conditions. Further, the general application of the catalysts was tested using various substituted anilines. The recyclability of the catalysts was also studied. Uncertainties in percentage yields were calculated to check the reproducible surface properties. The P-XRD, BET Surface area and NH3-TPD results indicated that the materials were amorphous with mesoporous texture, surface areas and acidities in the range 200-260 m2/g and 0.4-0.7 mmol/g resp. 27Al NMR studies revealed that Al was present in three different coordination states such as tetrahedral, pentagonal and octahedral. The relative percentages of these Al sites depended on the type of the potassium precursor phosphate salt used. Both tetrahedral and pentagonal Al sites in conjunction with each other represented catalytically active sites. An increase in the pentagonal sites contributed to addnl. increments to the catalytic activity of CAmAlP. The catalyst prepared from KH2PO4 was found to be the best and demonstrated 96% DPU yield. The experimental process involved the reaction of 1,3-Diphenylurea(cas: 102-07-8).Application of 102-07-8
The Article related to diphenyl urea preparation, aniline diethyl carbonate condensation ceramic amorphous aluminophosphate catalyst, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Ureas, Carbamic Acids, Guanidines, and Their Sulfur-Containing Analogs and other aspects.Application of 102-07-8
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Amide – an overview | ScienceDirect Topics