Tang, Bo published the artcileHierarchical FAU-Type Hafnosilicate Zeolite as a Robust Lewis Acid Catalyst for Catalytic Transfer Hydrogenation, Related Products of esters-buliding-blocks, the main research area is hafnosilicate zeolite catalyst transfer hydrogenation.
FAU-type hafnosilicate zeolite with a hierarchical structure (Hf-USY) was constructed through a post-synthesis strategy containing the controlled dealumination of the com. H-USY zeolite and the subsequent dry impregnation of the Cp2HfCl2 precursor. The incorporation of Hf ions into the zeolite framework involved the interaction between the silanol groups from framework dealumination and Cp2HfCl2 mols. Characterization results from UV-vis and XPS verified that the incorporated Hf ions mainly existed in the tetrahedrally coordinated form in the zeolite framework. The creation of Lewis acid sites associated with Hf incorporation was confirmed by Fourier transform IR spectroscopy with pyridine and deuterated acetonitrile adsorption. The as-synthesized Hf-USY zeolite served as a highly efficient catalyst in the transfer hydrogenation of Et levulinate to γ-valerolactone, outperforming the Sn- and Zr-silicate analogs. The Hf-USY catalyst also exhibited good performance in the transfer hydrogenation of more challenging substrates such as furanic, aromatic, as well as alkene-substituted carbonyl compounds into the corresponding alcs. The influence of Lewis acid sites, preparation parameters, as well as the hydrogen donor on the catalytic activity of the Hf-USY zeolite was investigated in detail. FAU-type hafnosilicate zeolite with a hierarchical structure is developed as a robust catalyst for the transfer hydrogenation of Et levulinate to γ-valerolactone.
ACS Sustainable Chemistry & Engineering published new progress about Beta zeolites Role: CAT (Catalyst Use), USES (Uses) (dealluminated, Hf-). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Related Products of esters-buliding-blocks.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics