1. Bimetallic homoleptic divalent metal-complexes of diisatin dihydrazone ligand. Biological activity and catalytic oxidation of sulfides.
- Author
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Adam, Mohamed Shaker S.
- Subjects
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CATALYTIC oxidation , *CATALYTIC activity , *SULFIDES , *LEWIS acidity , *BINDING constant , *SULFOXIDES , *LIGAND binding (Biochemistry) , *LIPOPHILICITY - Abstract
[Display omitted] • Pd2+ and VO2+-complexes of succinyldihydrazone derivative are synthesized and characterized. • VO-catalyst exhibits higher catalytic potential than that of Pd-catalyst in the oxidation of sulfides. • The antimicrobial and anticancer potential of M−complexes and their ligand are examined. • Their binding to ct DNA is examined via UV–Visible spectroscopy and hydrodynamic measurements. According to the significant role of transition metals in their metallo-organic frameworks catalytically and biologically, two new dinuclear homoleptic complexes of Pd2+ and VO2+ ions (PdLC 2 and VOLC 2 , respectively) with succinyl dihydrazone diisatin ligand (H 2 LC 2) were constructed. The effect of the M2+ ion type was distinguished in the productive redox protocol of diphenyl sulfide (DiPhS) and methylphenyl sulfide (MePhS) within H 2 O 2. Considerable productivity was assigned by the yielding percentages of diphenyl sulfoxide (DiPhSO) and methylphenyl sulfoxide (MePhSO) (the mono-oxo-selective product) catalyzed by PdLC 2 or VOLC 2 , in which VOLC 2 catalyst exhibited little more classified efficiency than that of PdLC 2 , referring to the progressed redox potential of V4+ ion in VOLC 2 catalyst. Their biological performance was recorded based on their inhibited potential against the growing power of some cancer/normal cells of humans, bacteria, as well as, fungi. The bio-studies appointed the role and job of M2+ ion (Pd2+ or VO2+ ion) in its chelated MLC 2 complex over the free ligand, H 2 LC 2. Moreover, their interacted modes with ct DNA (i.e. calf thymus DNA) were examined via the viscometries and spectrophotometric titration. Since the two chelates (PdLC 2 and VOLC 2) represented an attractive performance for the inhibited action for the current microorganisms and the cancer cell lines of humans' growth over the free H 2 LC 2 ligand. PdLC 2 and VOLC 2 complexes displayed an appreciable reaction with ct DNA more than that of their free organo-ligand H 2 LC 2. From the binding constant (K b) and Gibb's free energy (Δ G b ≠) values, both PdLC 2 and VOLC 2 exhibited more binding interaction within ct DNA than that of the H 2 LC 2 ligand, with the progressed Lewis acidity, electronegativity, and lipophilic feature (hydrophobicity). [ABSTRACT FROM AUTHOR]
- Published
- 2024
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