Focusing on the huge importance associated in developing functional materials, this research study describes the synthesis, characterization of morphology, bactericidal activity and cytotoxic effect of iron oxide nanoparticles (IONPs). IONPs have been successfully fabricated through thermal decomposition of a diiron(III) complex precursor. The morphology of the nanoparticle has been delineated with different spectroscopic and analytic methods. Scanning and transmission electron microscopy (FE-SEM and HR-TEM) analyses estimate the cross linked porous structure of IONPs with an average size ~97 nm. Dynamic light scattering (DLS) study of IONPs determines the hydrodynamic diameter as 104 nm. The cytotoxic behavior of IONPs has been examined against human lung cancer cell line (A549) through different fluorescence staining studies which ensure the mode of apoptosis for cell death of A549. Furthermore, measurement of reactive oxygen species suggests the destruction of mitochondrial membrane of Staphylococcus aureus , leading to effective bactericidal propensity which holds a good promise for IONPs to become a clinically approved antibacterial agent.

This work highlights the design, synthesis, structural characterization, electrical conductivities, and hydrogen evolution activities of a new pair of hybrid 3d(Ni)-4f(Ce) block metal complex salts, [Ni(phen)2(NO3)]2[Ce(NO3)6] (1) and [Ni(bpy)3][Ce(NO3)6][Ce(NO3)2(H2O)5]NO3 (2) containing phen and bpy ligands; [phen = 1,10-phenanthroline and bpy = 2,2′-bipyridine]. Crystal structural analysis divulges that complex salt 1 adopts two units of monocationic Ni(II) complex with one dianionic Ce(IV) complex unit while complex salt 2 exists in an association of one unit of dicationic Ni(II) complex with two complex units of Ce along with a counteranionic nitrate. The Ni(II) ions exist in distorted bicapped square pyramidal coordination geometry, while the Ni(II) center in 2 exists in an octahedral geometry. The cerium ion in 1 exists in dodecahedron geometry while the first and second Ce ions hold dodecahedral and tricapped trigonal prism coordination geometries, respectively. Supramolecular interactions reveal that predominant nonclassical forces like O···H, N···H, π···π, O···π, and O···O are interactive to shape highly ordered crystalline frameworks. Complex salt 2 exhibits a unique formation of the supramolecular cage-type framework by the cerium complex units, leading to the inclusion of Ni(II)-complex units into the supramolecular cages. The complex salts (1, 2) were employed to fabricate the Schottky devices to unveil the fate of the hybrid salts in charge transport applications. Carrier mobility (μ) for 1 and 2 were determined as 3.02 × 10–6 and 8.022 × 10–5 m2 V–1 s–1 with respective transit time(τ) of 2.60 × 10–7 and 9.67 × 10–9 s attributing the excellent candidature of complex salt 2 in transport properties. The hybrid salts were also found to be highly active electrocatalysts for proton reduction in 1 M aqueous KOH solution at room temperature. The overpotential values of 1 and 2 were determined to be 730 mV and 687 mV at a current density of 10 mA cm–2 with 0.081 s–1 and 0.225 s–1 as turnover frequencies. The supramolecular interactions–driven crystalline framework sheds light on the electrical conductivities and casting the hydrogen evolution activities for the newly designed hybrid d–f type complex salts.

Structurally characterized porous Ag(I)-molecular cage, AgMOC and Cu(II)-coordination polymer, CuCP with a premeditated ligand, 1,3-bis(((E)-2-methoxybenzylidene)amino)propan-2-ol and its parental amine with thiocyanate, respectively are reported to harness electrical mobility-driven hydrogen evolution...

Herein we report the fabrication of green emitting hybrid lead bromide perovskite single crystals (HLBPSCs), their anion exchange mediated tunable yellow luminescence and thereby their coupling ability with blue emitting inorganic complex leading to generation of a photostable white light emission, with properties close to bright day sunlight. The partial anion exchange reaction to green emitting HLBPSCs led to formation of yellow emitting anion exchanged HLBPSCs�which are termed as AE-HLBPSCs herein. Then, AE-HLBPSCs were chemically combined with blue emitting Zn-aspirin complex to produce white light with a photoluminescence quantum yield (PLQY) of 47.7%. The solid form of the white light emitting (WLE) composite (followed by coating with poly methyl methacrylate�PMMA) showed color coordinates of (0.34, 0.33), color rendering index of 76 and correlated color temperature of 5282 K. Furthermore, the PMMA coated inorganic complex coupled AE-HLBPSCs showed the preservation of their WLE nature and luminescence stability in their solid form.

In this work, an effort has been made to examine the counteranionic behavior of thiocyanide ion towards the stabilization of a dicationic tris(2,2'-bipyridine)nickel(II) complex in crystalline phase. The complex, [Ni(bipy)3].2NCS (1) [bipy = 2,2'-bipyridine] was designed, synthesized and structurally characterized.  The crystal structure analysis reveals that 1 crystallises in a hexagonal system with P6/mcc space group and adopts an octahedral geometry. The nickel(II) complex exhibits important cytotoxic behaviour towards lung cancer cell (A549).  IC50 value is calculated through MTT assay and determined as 131 µG/mol. Relative percentage of morphological changes is further determined and ~63% of the cells are destroyed through apoptosis mode with in 24 h incubation.