Employing a CuCl/TMEDA/nor-AZADO catalyst system, various types of structurally diverse imides could be synthesized from various combinations of alcohols and amides.
The direct synthesis of useful chemicals from methane (CH4) is desirable; however, the products are prone to nonselective overoxidation, leading to the formation of CO2. A previous study developed a...
We have reported several precisely designed metaloxo clusters on lacunary polyoxometalate (POM) tetra-nbutylammonium (TBA) salts in organic solvents. However, owing to their low thermostability and/or low effective surface area, POM TBA salts are not amenable to heterogeneous catalysts for gas-phase reactions at high temperature.To avoid this problem, we developed a new preparation method that obtains highly dispersed supported-POM Cs salts (CsÀ POM/support) via cation exchange from the corresponding TBA salts on supports. In this study, a model Keggin-type POM called TBA 4 PVMo 11 O 40 (TBAÀ PVMo11) is supported on oxides (TBAÀ PVMo11/support) using an incipient wetness method in acetonitrile. This TBAÀ PVMo11/ support was cation-exchanged with cesium trifluoromethanesulfonate in ethanol to obtain supported-POM Cs salts (CsÀ PVMo11/support). Various characterizations revealed that the TBAÀ PVMo11/support maintained the original Keggin structure during cation exchange and that CsÀ PVMo11 was highly dispersed on the supports. Furthermore, CsÀ PVMo11/ support maintained the Keggin structure even after calcination at 573 K under an aerobic condition.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.