Template synthesis, spectroscopic, antibacterial, and antifungal studies of trivalent transition metal ion macrocyclic complexes.
A novel series of complexes of the type [M(C(36)H(22)N(6))X]X(2), where M = Cr(III), Mn(III), Fe(III); X = Cl(-), NO(3)(-), CH(3)COO(-); and (C(36)H(22)N(6)) corresponds to the tetradentate macrocyclic ligand, have been synthesized by condensation of 1,8-diaminonaphthalene and isatin in the presence of trivalent metal salts in methanolic medium. The complexes have been characterized by elemental analysis, conductance and magnetic measurements, and UV/Vis, IR, and mass spectroscopy. On the basis of these studies, a five coordinate square pyramidal geometry for all of these complexes is proposed. All synthesized macrocyclic complexes have been tested for in vitro antimicrobial activities against some pathogenic bacterial strains, viz. Staphylococcus aureus, Bacillus subtilis (Gram-positive), Escherichia coli, Pseudomonas aeruginosa (Gram-negative), and two fungal strains, viz. Aspergillus niger, Aspergillus flavus. The MICs shown by the complexes against these microbial strains have been compared with MICs shown by standard antibiotic ciprofloxacin and the antifungal drug amphotericin-B.
Department of Chemistry, National Institute of Technology, Kurukshetra, India. dpsinghchem@yahoo.co.in
D P
DP
Singh
Krishan
K
Kumar
Chetan
C
Sharma
K R
KR
Aneja
D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D000935:Antifungal Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000494:pharmacology / Q000627:therapeutic use; D005658:Fungi / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D008024:Ligands; D047028:Macrocyclic Compounds; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D013057:Spectrum Analysis; D013329:Structure-Activity Relationship; D028561:Transition Elements
D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D056831:Coordination Complexes; D008024:Ligands; D047028:Macrocyclic Compounds; D028561:Transition Elements