Improved Catalytic Performance toward Selective Oxidation of Benzyl Alcohols Originated from New Open‐Framework Copper Molybdovanadate with a Unique V/Mo Ratio

Abstract

A new organic‐inorganic hybrid open‐framework molybdovanadate with mixed‐valences of vanadium (V4+/V5+=4/3) and molybdenum (Mo5+/Mo6+=8/2) cations has been synthesized. The complex possesses the unique V/Mo ratio (7/10), fascinating 8‐C topological network and 1D 4‐MR channels (7.793 Å×6.699 Å). Importantly, its catalytic activities for the selective oxidation of benzyl alcohol to benzaldehyde (oxidant: H2O2, 30 wt %) have been well evaluated. The results indicated that it exhibited improved catalytic activities (conv.: 96.8 %) compared with the catalyst (Cpyr)5PV2Mo5W5O40 [conv.: 88.51 %, Cpyr=(C16H32C5H4N)+)], high recyclability and structural stability. Moreover, the conversions and selectivities (conv.: 82.4–92.5 %; sele.: 91.5–95.7 %) of the substrates containing electron donating groups (−OH, −CH3, −OCH3 and −Cl) were significantly higher than those of the substrate containing electron withdrawing group (−NO2) (conv. 67.4 %; sele.: 80.8 %). This is due to the fact that the −NO2 with a large Hammett substituent constant is not conducive to the generation of transition state products. The studies revealed the complex could act as a highly efficient heterogeneous catalyst in selective oxidation of benzyl alcohols.

Cd(II)-based complex loaded with drug doxorubicin hydrogels against leukemia and reinforcement learning

“…In the past decades, the study of metal–organic frameworks (MOFs) has gained increasing interest because of the interesting structure features and specific functional properties: segregation, conservation, catalysis, luminescence and magnetism, and others 3 – 5 . It is widely recognized that the properties of MOFs are usually controlled mainly by their architecture, with extraneous factors (molar ratio of reactants, solvent system, pH, reaction thermo) being important and inherent factors (type of organic linker, configuration of ligands and properties of the central metal ion) taking a key part in governing the framework 6 – 10 . In terms of linker selection: polycarboxylic acid ligands are always desirable suspects for the construction of varied novel MOFs due to their multiple ligand sites and flexible ligand patterns 11 – 14 .…”

Utilizing Ni(II) complex for metal drug-gel particles in cervical cancer treatment and designing novel drugs through machine learning methods

“…The L ligand is a semi-rigid imidazole ligand that possesses a possible unsaturated site. This property helps it create a contact with target proteins, potentially producing CPs with intriguing bioactivity 17 – 22 . In this work, a novel CP based on Ni(II) has been produced successfully through applying a mixed ligand synthesis method via reacting Ni(NO 3 ) 2 ·6H 2 O with L ligand in the presence of a carboxylic acid co-ligand.…”