• Sanjeevani S.Patil
• B.B Nagolkar
• Dr.S.G. Shankarwar

: A series of rare earth metal complexes of Ce(III), Pr(III), Nd(III), Sm(III), Gd(III) and Eu(III) have been synthesized with newly synthesized biologically active macrocyclic ligand. The ligand was synthesized by condensation of β-diketone 1-(4-fluorophenyl)-3-(2-hydroxyphenyl)propane-1,3-dione and 4-chlorobenzene-1,2-diamine. These complexes were characterized by various physico-analytical techniques, elemental analysis, molar conductivity, magnetic susceptibility, thermal analysis, X-ray diffraction, IR, 1H-NMR, electronic and mass spectroscopy. From the analytical data, stoichiometry of the complexes was found to be 1:1 (metal: ligand). Thermal behavior (TG/DTA) analysis suggests more ordered activated state in complex formation. All the complexes are of high spin type and seven coordinated. The antibacterial and antifungal activities of the ligand and its metal complexes, has been screened in vitro against Bacillus subtilis, Pseudomonas aeruginosa, Staphylococcus aures, Candida Albicans, Aspergillus Flavus respectively. All the complexes were found to be the more active than their parent ligand and metal salts

Macrocyclic ligand, Rare earth metal complexes, Thermal analysis, Powder X-ray diffraction, Biological activity.

"Synthesis, spectral, thermal and antimicrobial studies of Rare earth metal complexes of 14-membered Tetraaza [N4] macrocyclic ligand.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.471-475, July-2018, Available :http://www.jetir.org/papers/JETIR1807313.pdf

"Synthesis, spectral, thermal and antimicrobial studies of Rare earth metal complexes of 14-membered Tetraaza [N4] macrocyclic ligand.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp471-475, July-2018, Available at : http://www.jetir.org/papers/JETIR1807313.pdf