Green synthesis and antibacterial/fungal studies of two new Schiff base derived from 4-(imidazol-1-yl)benzaldehyde

298-304This study synthesizes two new Schiff bases, (E)-1-(4-1H-imidazol-1-yl)phenyl)-N-(o-tolyl)methanimine and (E)-1-(4-(1Himidazol- 1-yl)phenyl)-N-(m-tolyl)methanimine through condensation reaction between 4-(imidazol-1-yl)benzaldehyde and 2-toluidine/o-toluidine, respectively. FT-IR, X-ray diffraction and 1H NMR spectroscopy have been carried out to characterize the structure of the products. Through antibacterial/ antifungal activity tests performed using 8 kinds of bacteria/fungus, it is found that the both of the two Schiff bases can suppress the growth of Staphylococcus, Bacillus subtilis and Salmonella, showing good potential as antibacterial drug

Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol

A feasible and effective self-assembly method to synthesize different scale coordination polymers in highly dilute solution (from nanocrystals to microcrystals and to bulk crystals) without any blocking agent has been described. The growth of crystalline particles was controlled by removing the particles at different reaction times to interrupt the growth at the desired size. The nano and microscale particles show better catalytic conversions and selectivities in the hydroxylation of phenols than the bulk crystals

Green synthesis and antibacterial/fungal studies of two new Schiff base derived from 4-(imidazol-1-yl)benzaldehyde

This study synthesizes two new Schiff bases, (E)-1-(4-1H-imidazol-1-yl)phenyl)-N-(o-tolyl)methanimine and (E)-1-(4-(1H-imidazol-1-yl)phenyl)-N-(m-tolyl)methanimine through condensation reaction between 4-(imidazol-1-yl)benzaldehyde and 2-toluidine/o-toluidine, respectively. FT-IR, X-ray diffraction and 1H NMR spectroscopy have been carried out to characterize the structure of the products. Through antibacterial/ antifungal activity tests performed using 8 kinds of bacteria/fungus, it is found that the both of the two Schiff bases can suppress the growth of Staphylococcus, Bacillus subtilis and Salmonella, showing good potential as antibacterial drug

Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol

Abstract A feasible and effective self-assembly method to synthesize different scale coordination polymers in highly dilute solution (from nanocrystals to microcrystals and to bulk crystals) without any blocking agent has been described. The growth of crystalline particles was controlled by removing the particles at different reaction times to interrupt the growth at the desired size. The nano and microscale particles show better catalytic conversions and selectivities in the hydroxylation of phenols than the bulk crystals.</p

Dual-Core Fe₂O₃@Carbon Structure Derived from Hydrothermal Carbonization of Chitosan as a Highly Efficient Material for Selective Adsorption

A dual-core Fe₂O₃@carbon structure was prepared by a hydrothermal treatment of iron salt and chitosan (CS) solution. The structure exhibits microsphere-like (∼850 nm in size) morphology with dual cores at two ends. The existence of CS plays an important role in the formation of the dual-core–shell structure. The unique structure was investigated to be a CS adsorption, and subsequent carbonization induced a selective etching process. Further, the special structure was proven to be a highly efficient material for selective adsorption. The dual-core structure facilitates the exposure of the Fe₂O₃ surface, and the carbonaceous shell gives plenty of functional groups for selective adsorption. More importantly, the selectivity was highly dependent on pH values. It was found that the adsorbent showed higher adsorption selectivity toward Cr­(VI) at lower pH values, while the selectivity transferred toward Cu­(II) at higher pH values by adsorption of Cu­(II) and Cr­(VI) in single-component solutions. In binary-component solution, the dual-core Fe₂O₃@C structure revealed adsorption selectivity for Cr­(VI), with the highest separator factor [α_Cu(II)^Cr(VI)] = 1162, due to the strong electrostatic adsorption-coupled reduction interaction induced by the special structure of the adsorbent. This work not only gives deep insights into the understanding of the formation of the dual-core structure but also supplies a novel adsorbent with selective adsorption properties for water treatment