Synthesis of new microbial pesticide metal complexes derived from coumarin-imine ligand.
A series of metal complexes of zinc(II), cadmium(II), copper(II), nickel(II) and palladium(II) have been synthesized from coumarin-imine ligand, 8-[(1E)-1-(2-aminophenyliminio)ethyl]-2-oxo-2H-chromen-7-olate, [HL]. The structures of the complexes were proposed in the light of their spectroscopic, molar conductance, magnetic and thermal studies. The ligand coordinated in a tridentate manner through the azomethine nitrogen, the phenolic oxygen and the amine nitrogen and all complexes were non-electrolytes with different geometrical arrangements around the central metal ion. Photoluminescence data unambiguously showed remarkable fluorescence enhancement to Zn(2+) over other cations. The antimicrobial screening tests revealed that copper(II) complex exhibited the highest potency and its minimum inhibitory concentration on the enzymatic activities of the tested microbial species was determined. No toxin productivity was detected for all tested toxigenic species upon the exposure of copper complex.
Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 2, Moharram Beck, Alexandria 21568, Egypt. Electronic address: amel_elhusseiny@sci.alexu.edu.eg.
Amel F
AF
Elhusseiny
Department of Chemistry, Girls Section, University of King Abdulaziz, PO Box 6171, Jeddah, Saudi Arabia.
Elham S
ES
Aazam
Department of Chemistry, Girls Section, University of King Abdulaziz, PO Box 6171, Jeddah, Saudi Arabia.
Huda M
HM
Al-Amri
D003374:Coumarins / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D005658:Fungi / Q000254:growth & development*; D005659:Fungicides, Industrial / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D008670:Metals / Q000737:chemistry*
D003374:Coumarins; D005659:Fungicides, Industrial; D008670:Metals
Bioactive pesticide; Metal complexes; Spectral characterization