| Autor: |
Shendge, Pratidnya, Sharma, Shailza, Baral, Minati, Patel, Apurva, Parekh, Smita, Kanungo, B. K |
| Předmět: |
|
| Zdroj: |
Phosphorus, Sulfur & Silicon & the Related Elements; 2021, Vol. 196 Issue 2, p155-167, 13p |
| Abstrakt: |
Synthesis, characterization, coordination, bonding and electronic behavior of an ONS pincer ligand with divalent iron, cobalt, copper and zinc are described. The ligand is synthesized by condensation of dihydroxybenzaldehyde with thiosemicarbazide. The reaction of the ligand with metal ions in 1:2 (M:L) stoichiometric in identical conditions resulted in two octahedral pincer type complexes with iron and cobalt in which two ligands extend a perpendicular shape-retaining the ligand's linearity, and one trigonal bipyramidal pincer complex with zinc. For copper, the ligand preferred a bidentate coordination mode forming a square planar geometry. The structure of the copper complex can be viewed as a molecular hammock. Quantum mechanical studies at DFT level were undertaken to confirm the geometry, spectroscopic and electronic properties of all the complexes. The ability of the compounds to possess biological activity is tested against various pathogenic bacterial strains. The results show that the copper complex displays higher antimicrobial activities as compared to the ligand and other complexes. A remarkable change in the electronic spectrum of the ligand in the presence of cobalt ion in highly aqueous medium demonstrates its use as a metal sensor among a wide range of biological important metal ions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
