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Novel compounds with pharmacological activity were synthesized from Pd(II), Fe(III), Cr(III), Ni(II), and Cu(II) ions with 1‐cyclopropyl‐6‐fluoro‐4‐(2‐hydroxy‐phenylimino)‐7‐piperazin‐1‐yl‐1,4‐dihydro‐quinoline‐3‐carboxylic acid (CFAP). The ligand's NH and OH groups allowed it to interact with the metals as a neutral tridentate. The investigated novel compounds were described using 1H and 13C NMR spectra, FT‐IR spectrums, TGA and UV–Vis (conductance of molecules), and CHN‐analysis. Additionally, the pH profile of the CFAP complexes indicated great stability, and the complexes' stability constant was discovered in the solution. To extract important properties for CFAP and its complexes, computational research was used, CFAPCu, CFAPCr, CFAPNi, and CFAPFe have octahedral geometry, while CFAPPd has square planar geometry. To investigate the molecular geometry, density functional theory calculations (DFT) were carried out. The molar ratio and continuous fluctuation data confirmed that the (M:L) ratio was (1:1). In vitro tests were conducted to evaluate Schiff base's antimicrobial action ligand and its metal chelates against fungal and bacterial infections. The findings showed that the antimicrobial efficacy is as follows: When CFAPPd is compared to fluconazol and ofloxacin as reference medications, it is the highly inhibitor complex. The novel CFAP ligand and its complexes were investigated for In vitro carcinogenic potential against Hep‐G2, MCF‐7, and HCT‐116 cell lines. As compared to the medication vinblastine, the results once again demonstrated that CFAPPd is the most active agent. Moreover, the complexes demnstrated strong reactivity in capturing free radicals when their antioxidant activity was investigated. Viscosity, spectral investigations, and gel electrophoreses were used to identify the interaction between metal chelates and DNA. Every examined compound is shown to be an enthusiastic DNA binder by viscosity and spectrophotometric titration investigations. The heightened hydrophobic and electrostatic interactions between aromatic rings could be the cause of this. Ultimately, these compounds could be regarded as promising bioactive substances. [ABSTRACT FROM AUTHOR]

Lithium and sodium compounds supported by tetradentate amino-bis(phenolato) ligands, [Li2(N2O2BuBuPip)] (1), [Na2(N2O2BuBuPip)] (2) (where [N2O2BuBuPip] = 2,2′-N,N’-homopiperazinyl-bis(2-methylene-4,6-tert-butylphenol), and [Li2(N2O2BuMePip)] (3), [Na2(N2O2BuMePip)] (4) (where [N2O2BuMePip] = 2,2′-N,N’-homopiperazinyl-bis(2-methylene-4-methyl-6-tert-butylphenol) were synthesized and characterized by NMR spectroscopy and MALDI-TOF mass spectrometry. Variable temperature NMR experiments were performed to understand solution-phase dynamics. The solid-state structures of 1 and 4 were determined by X-ray diffraction and reveal tetrametallic species. PGSE NMR spectroscopic data suggests that 1 maintains its aggregated structure in CD2Cl2. The complexes exhibit good activity for controlled ring-opening polymerization of rac-lactide (LA) both solvent free and in solution to yield PLA with low dispersities. Stoichiometric reactions suggest that the formation of PLA may proceed by the typical coordination–insertion mechanism. For example, 7Li NMR experiments show growth of a new resonance when 1 is mixed with 1 equiv. LA and 1H NMR data suggests formation of a Li-alkoxide species upon reaction of 1 with BnOH. [ABSTRACT FROM AUTHOR]

• Nano SCPs [AgN 3 (bpy)] 1 and [(AgCN) 2 (bpy)] 2 were prepared by ultrasonic waves. • The structures were investigated by X-ray diffraction of single crystals. • TEM images support nanosized particles of NSCPs1 and 2. • Antioxidant, erythrocyte hemolysis and DNA binding were investigated. • Cytotoxic and antimicrobial activities had been investigated. Ultrasonic self-assembly method was utilized to prepare new nano supramolecular coordination polymers (SCPs), 3 ∞ [AgN 3 (bpy)], NSCP1 and 3 ∞ [(AgCN) 2 (bpy)], NSCP2 [bpy= 4,4\-bipyridine] while the single crystals were prepared at ambient conditions. The silver atom in 1 acquires square planer geometry via coordination to four nitrogen atoms while NSCP2 contains two crystallographically different silver atoms adopting distorted trigonal planar geometry. The structures extend via corrugated catenated (AgN 3) or (AgCN) chains which are linked by bpy forming 2D-layer structure. The 2D-layers are interconnected by π–π stacking, H- bonds and argentophilic interactions creating 3D-network structure. TEM images support nanoscale particles of NSCPs1 and 2. NSCPs 1 and 2 had been utilized as potent anticancer and anti-pathogenic micro-organisms. In vitro cytotoxicity and cell viable activity of the NSCPs1 and 2 had been studied against a set of different human cancer cell lines. The higher level of the NSCPs cytotoxicity was recorded against MCF-7 and HePG2 cells. Also, they own a good ability to inhibit the growth of the tested neoplastic cells and a poor effect on the normal cells in comparison with the results of cisplatin. Also, antioxidant activities, erythrocyte hemolysis, DNA binding and antimicrobial activities had been investigated. [Display omitted] [ABSTRACT FROM AUTHOR]