Biological and catalytic potential of sustainable low and high valent metal-Schiff base sulfonate salicylidene pincer complexes

Abstract

ONO-Tridentate Schiff base complexes with VO2+, UO22+, MoO22+ and Mn2+ were synthesized and characterized. All the complexes were shown to be of potential use as anticancer agents against selected human carcinoma cell lines.

Nanocomposite‐based inorganic‐organocatalyst Cu(II) complex and SiO2‐ and Fe3O4 nanoparticles as low‐cost and efficient catalysts for aniline and 2‐aminopyridine oxidation

“…In addition, an observable absorption spectral band in the visible region is due to the L‐CT band (the intramolecular charge transfer in the free ligand molecule) at 352 nm (Table 1). [ 40 ] After the complexation, the π → π* transition band shifted a little to 240 nm, whereas the n → π* transition band completely disappeared. Moreover, the visible transition band also shifted to a lower‐energy scale at 321 nm, which caused the ML‐CT transition (metal‐to‐ligand charge transfer).…”

Bis‐dioxomolybdenum (VI) oxalyldihydrazone complexes: Synthesis, characterization, DFT studies, catalytic epoxidation potential, molecular modeling and biological evaluations

“…Furthermore, the classified azo‐methine group band (1611 cm −1 for H 2 L1 and H 2 L2) was remarkable shifted to 1558 cm −1 , respectively. This behavior could result from the bonding of nitrogen lone pair of —C=N— group to cis ‐(MoO 2 ) 2+ ion . The labile coordinated solvent molecules, i.e.…”

“…The promising catalytic, anticancer and antioxidant features of the newly synthesized bis ‐dioxomolybdenum complexes (MoO 2 L1 and MoO 2 L2) and their corresponding bis ‐dihydrazone ligands (H 2 L1 and H 2 L2) encouraged us to examine their corresponding antimicrobial potentials. Several transition metal complexes, specifically bis ‐dioxomolybdenum complexes, were reported as selective suppressors of different microbial action. Therefore, the antimicrobial activity of the MoO 2 ‐complexes and their free ligands under considerations was examined using the disc diffusion and microdilution methods against Staphylococcus aureus Gram‐positive bacteria and two Gram‐negative bacteria namely, Escherichia coli and Serratia Marcescence as well as Candida albicans , Aspergillus flavus and Trichophyton rubrum fungal strains.…”

“…anticancer, antiparasitic and anti‐inflammatory activities . Interestingly, the biological properties of Schiff bases are usually improved after coordination with various transition metal ions . Indeed, Mo‐Schiff base complexes would not be of potential interest only in medicinal chemistry but also in homogeneous and heterogeneous catalysis .…”

“…Industrially, transition metal‐based catalytic (ep)oxidation of alkenes under mild conditions has recently gained great interest . (Ep)oxidation of alkenes and alcohols catalyzed by Mo (VI)‐complexes was intensively studied in recent years . Mo VI O 2 ‐complexes are routinely used in the production of industrial propylene oxide and in the efficient chemoselective oxidation of linear and branched alkenes .…”