Synergistic catalysis of the Brönsted acid and highly dispersed Cu on the mesoporous Beta zeolite in the intermolecular aminoazidation of styrene

High stereoselectivity synthesis of Z-3-methyleneisoindolin-1-ones on a Cu/ETS-10 catalyst via domino coupling–cyclization without the use of protective groups and ligands

“…19 The XPS spectra revealed that the higher content of Cu + in the Cu/ETS-10 catalyst compared to Cu 2+ was attributed to the presence of a strong metal–support interaction on the catalyst, leading to the transfer of electrons from the framework oxygen to the Cu species. 20 Dynamic transformation, such as valence states of the metal caused by metal–support interaction, are ubiquitous for supported metal catalysts during catalytic processes. 11 b…”

Brønsted acid sites in the Beta zeolite induced highly efficient amidation of styrene in the aqueous phase

“…6(c)). The IR spectrum of pure styrene (1a) revealed the absorption bands in the region of 3008-3081 cm À1 , which are characteristic of the stretching vibrations of C-H in a benzene ring, and another band at 2978 cm À1 that is diagnostic of the stretching vibrations of C-H in the CQC bond, 32,38 while for the H-MBeta-1a sample, three new bands at 2870, 2927 and 2960 cm À1 appeared. The 2870 and 2960 cm À1 corresponded to symmetry and asymmetry stretching vibrations of C-H in methyl, respectively, and the 2927 cm À1 band was related to the C-H stretching vibrations in methylene.…”

Acidic mesoporous Beta zeolite assembled Fe catalyst with good catalytic performance in the carboazidation of N‐arylacrylamides

“…[27][28][29][30] S1). This could be due to the fact that small FeO and Fe 2 O 3 clusters on the Fe/Beta-M and Fe/ZSM-5-M catalyst could strong interact with the zeolite support, [31,32] leading to the easy occurrence of the electron transfer between the anion framework and metal.…”

“…Notably, the binding energies of Fe 2+ oct and Fe 3+ oct in Fe/Beta-M (710.3 and 711.7 eV) and Fe/ZSM-5-M (710.2 and 711.7 eV) are slightly higher Fe/ZSM-5 (710.0 and 711.5 eV, Table S1). This could be due to the fact that small FeO and Fe 2 O 3 clusters on the Fe/Beta-M and Fe/ZSM-5-M catalyst could strong interact with the zeolite support, [31,32] leading to the easy occurrence of the electron transfer between the anion framework and metal.…”