Employing a CuCl/TMEDA/nor-AZADO catalyst system, various types of structurally diverse imides could be synthesized from various combinations of alcohols and amides.

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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.