Nano-composites comprised of magnetite nanoparticles in a pectin matrix were prepared by the co-precipitation method. Both sodium hydroxide and ammonium used as precipitating agents effects stoichiometric ratios iron salts to polymer concentration on particle properties investigated. The precipitates obtained with NH4OH sponge-like. XRD pattern revealed only oxide phase present when was base whilst precipitated using NaOH showed presence additional peaks. nanocomposites further characterized...

Magnetic nanocomposites composed of superparamagnetic magnetite nanoparticles in a pectin matrix were synthesized by an situ coprecipitation method. The acted as stabilizer and size control host for the (MNPs) ensuring particle homogeneity. effects different reactant ratios nanocomposite drying conditions on magnetic properties investigated. characterized X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM), energy dispersive spectroscopy (EDX), Fourier‐transform...

The reaction of cyclo-(P3tBu3) with CuI and AgI salts led to the di- tetranuclear complexes [Cun(μ-Br)n{μ-cyclo-(P3tBu3)-κP1,κP2}2] n = 2 (1) 4 (2) [Agn(OTf)n(CH3CN)n-2{μ-cyclo-(P3tBu3)-κP1,κP2}2] (4) (5). Complexes 1, 2, 5 were isolated as crystalline powders or single crystals characterised by X-ray diffraction. In solution, these exhibit a dynamic equilibrium which involves continuous dissociation reforming phosphorus-metal bonds leading isomeric intermediate. This behaviour was...

Three new 1,10-phenanthroline and 2,2'-bipyridine mixed-ligand complexes of [Co(bpy)(phen)2](NO3)2.2H2O, [Cu(bpy)(phen) H2O)2]Cl2.2H2O, [Zn(bpy)2(phen)]Cl2.6H2O were synthesized. The characterized by elemental, IR visible spectroscopic analyses the results indicate that both ligands are coordinated to respective metal ions giving octahedral complexes. Antimicrobial studies showed there is increased antimicrobial activity on coordination ligands. water soluble activities higher than those...

Copper oxide (CuO), titanium (TiO 2 ), and Cu-doped TiO nanoparticles have been synthesized by pyrolysis of their corresponding precursors initially prepared precipitation in aqueous solution using A. carambola fruit juice as a natural source the precipitating agent (oxalate). The were characterized FTIR, TGA, PXRD. results revealed that obtained CuC O 4 , (OH − ) C copper-doped hydroxyl oxalate, copper oxalate. Complete decomposition for as-prepared containing ions occurs at 600°C while...

Two complexes, a cobalt(II) complex [Co(phen)3(NO3)2]·2H2O (1) and novel Co(III) with mixed ligands [diazido-bis(1,10-phenanthroline-κ2 N,N′)cobalt(III)]nitrate [Co(phen)2(N3)2]NO3 (2), have been synthesized were characterized by physico-chemical spectroscopic methods. The cobalt(III) (2) crystallizes in the orthorhombic crystal system space group Iba2 four formula units. central atom is six coordinate N atoms of two 1,10-phenanthroline (1,10-phen) molecules terminal from azide anions giving...

Pectin-starch magnetite hybrid nanoparticles were fabricated, characterized, and evaluated as potential absorbents for methylene blue dye based on recycling water from the textile industry. The nanocomposite adsorbent was synthesized with iron salt coprecipitation method, precipitates obtained sponge-like. effects of a pectin : starch ratio in absorbent amount adsorbed investigated. nanocomposites characterized using Fourier-transform infrared spectroscopy (FTIR), before after adsorption....

A novel one-dimensional coordination polymer bis(2-aminopyridine)- μ -bis(dicyanamido) cobaltate(II) has been synthesized and characterized by elemental analyses infrared ultraviolet visible spectroscopies the structure determined single crystal X-ray diffraction. Co(II) ion in complex is coordinated to two axial 2-aminopyridine ligands through pyridine N-atom four equatorial dicyanamide give a CoN 6 slightly distorted octahedral environment around metal ion. The amino forms intrachain...

CdO nanoparticles have been prepared by the thermal decomposition of a precursor complex. A simple and cost effective room temperature synthetic technique allows preparation complex from hexamethylenetetramine cadmium nitrate in ethanol. The precursor, characterized elemental analysis, mass spectrometry, Fourier transform infrared spectroscopy (FTIR), gravimetric had composition [{Cd(HMTA)(NO3)2(H2O)2}n]. It was calcined at 500 ºC for 2 h, oxide obtained X-ray diffraction (XRD), scanning...

A copper(II) complex with picolinic acid as ligand has been synthesised and characterised by elemental analysis, magnetic susceptibility, Fourier transform infrared spectroscopy (FTIR) ultraviolet-visible spectroscopic techniques. The crystal structure of the determined single X-ray diffraction technique was found to coordinate through N- O-atoms. were screened for their activity against resistant strains fungi (Candida albicans ATCC P37039, Candida 194 B, glabrata 44B, Cryptococcus...

Abstract Group 6 metal (Cr, Mo, W) carbonyl complexes react with cyclo -(P 5 Ph ) to afford the phosphorus-rich [Cr(CO) { )-κ P 1 }] ( ), [{Cr(CO) } 2 {μ- , 3 [M(CO) 4 (with M=Cr Mo W exo - endo -5 )) depending on reaction conditions. Complexes 1–5 were characterised by 31 P{ H} NMR and IR spectroscopy, elemental analysis, X-ray crystallography. The cyclopentaphosphane remains intact acts as monodentate bridging or bidentate 3–5 ligand. Compounds are configurational isomers essentially...

A nickel(II) complex with hexamethylenetetramine and thiocyanate ion as coligands has been synthesized characterised by infrared spectroscopy ultraviolet-visible spectroscopic techniques. The crystal structure of the was determined single X-ray diffraction ligands were found to coordinate terminally through N-atoms. ligand screened for their activity against resistant strains bacteria ( Salmonella enteric , Shigella flexneri Escherichia coli, Staphylococcus aureus ) fungi Candida albicans...

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The reaction of [M(CO) 4 L x ] {M = Cr, W, MeCN, 2; M Mo, 2,5‐norbornadiene (nbd), 1} with cyclo ‐(P 5 Ph ) led to an unusual transformation including the oxidative addition a P–P bond Group 6 metal carbonyl, insertion MeCN into bond, and formation M–M bond. products were characterized by IR 31 P{ 1 H} NMR spectroscopy, ESI mass spectrometry single crystal X‐ray crystallography. complexes contain metal–metal unit bridged two terminal phosphanido groups novel ligand,...

A green, simple, and environmentally benign synthetic approach has been utilised to obtain some bivalent metal oxalates from Averrhoa carambola juice extract, without any purification or special treatment of the juice. The main acid components (oxalic ascorbic acid) were identified by HPLC technique. effect temperature on purity product investigated. as-synthesized thermally decomposed at low temperatures their respective oxide nanoparticles. thermal decomposition products characterized...

Co3O4 and ZnO nanoparticles with different morphologies were synthesised by the thermal decomposition of single source precursors obtained from readily available eco-friendly starting materials (hexamethylenetetramine metal nitrates). The precursors, which characterized elemental analysis, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction gravimetric calcined at 500ºC for 2 h, oxide samples FTIR, (XRD), field emission scanning electron microscopy (FESEM), transmission (TEM),...

A novel Cu(II) complex with mixed ligands, [azido-bis(1,10-phenanthroline-κ2N,N′)copper(II)]nitrate hydrate has been synthesized and was characterized by physicochemical spectroscopic methods. The central atom is five coordinate four N atoms of two 1,10-phenanthroline molecules one terminal from an azide anion, giving a distorted trigonal bipyramidal geometry CuN5 chromophore. molecular structure the compound consolidated H-bonding face-to face π-π stacking between aromatic rings ligand....

Reaction of zinc acetate, potassium thiocyanate and the ligand 3-ampy gave discrete tetrahedral complex [Zn(NCS)2(3-ampy)2] in which chelates a monodentate fashion through its pyridine-N atom. It was characterized by single crystal X-ray diffraction, infrared, elemental analysis. Density Functional Theory calculations were performed order to gain insights into role weak molecular interactions that influence self-assembly process packing. X---H (X = H, C, N S) inter-actions. S-H (30.2%) found...