Baojun Su

Synthesis, characterization and biological activity of ferrocene-based Schiff base ligands and their metal (II) complexes.

Metal (II) complexes derived from S-benzyl-N-(1-ferrocenyl-3-(4-methylbenzene)acrylketone) dithiocarbazate; HL(1), S-benzyl-N-(1-ferrocenyl-3-(4-chlorobenzene)acrylketone)dithiocarbazate; HL(2), all the compounds were characterized using various spectroscopic techniques. The molar conductance data revealed that the chelates were non-electrolytes. IR spectra showed that the Schiff bases were coordinated to the metal ions in a bidentate manner with N, S donor sites. The ligands and their metal complexes have been screened for in vitro antibacterial, antifungal properties. The result of these studies have revealed that zinc (II) complexes 6 and 13 of both the ligands and copper (II) complexes 9 of the HL(2) were observed to be the most active against all bacterial strains, antifungal activity was overall enhanced after complexation of the ligands.

Synthesis and characterization of novel benzaldehyde derivatives containing 1,3,4-thiadiazole

In the work discussed in this paper, a series of novel benzaldehyde derivatives containing 1,3,4-thiadiazole were prepared in high yield from 4-fluorobenzaldehyde and 2-amino-5-substituted-1,3,4-thiadiazole. The products were characterized by determination of melting point, elemental analysis, and UV–visible, IR, 1H NMR, and 13C NMR spectroscopy. The fluorescence properties of the compounds were also studied by recording their fluorescence emission spectra.

Synthesis and antimicrobial activity of some novel ferrocene-based Schiff bases containing a ferrocene unit

In the present investigation, a series of ferrocene-based Schiff bases 5a–m were synthesized by the condensation of various chalcones 3a–m with S-benzyl dithiocarbazate in absolute ethanol using catalytic amount of glacial acetic acid, and characterized by element analysis,1H NMR,13C NMR, and IR. The synthesized compounds were screened for their in vitro antimicrobial activity against four bacterias (Staphylococcus aureus ATCC 9144, Bacillus cereus ATCC 11778, Escherichia coli ATCC 25922, and Pseudomonas aeruginosa ATCC 43288) and two fungals (Aspergillusniger ATCC 9092 and Aspergillus fumigatus ATCC 46645) strains. The Schiff bases 5g, 5h, and 5m against Gram-positive bacterial (E. coli and P. aeruginosa) strains was found to be higher than that for the standard drug. They are potential new drugs in antibacterial activity aspects in further days.