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Abstract
A novel hybrid phosphite [(C4N2H14)Co(H2PO3)4·2H2O] was synthesized with 1,4- diaminobutane (dabn) as a structure-directing agent using slow evaporation method. Single crystal X-ray diffraction analysis showed that it crystallizes in the triclinic system (S.G: P-1, #2) with the following unit cell parameters (Å, °) a = 5.4814 (3), b = 7.5515 (4), c = 10.8548 (6), α = 88.001 (4), β = 88.707 (5), γ = 85.126 (5). The crystal structure was built up from corner-sharing [CoO6]-octahedrons, forming chains parallel to [001], which are interconnected by H2PO3 pseudo-pyramid units. The diprotonated 1,4-diaminobutane molecules, residing between the parallel chains, interacted with the inorganic moiety via hydrogen bonds leading thus to the formation of the 3D crystal structure. The Fourier transform infrared result exhibited characteristic bands corresponding to the phosphite group and the organic molecule. The thermal decomposition of the compound consists mainly of the loss of the organic moiety and the water molecules. The biological tests exhibited significant activity against Candida albicans and Escherichia coli strains in all used concentrations, while less activity was pronounced when tested against Staphylococcus epidermidis and Saccharomyces cerevisiae, while there was no activity against the nematode model Steinernema feltiae.
Highlights
Hybrid organic-inorganic materials have attracted a great deal of attention in different fields because of their rich structural chemistry and wide potential applications in ion-exchange, adsorption, separation, and catalysis [1,2,3,4,5,6,7]
The nematicidal activity of (C4 N2 H14 )[Co(H2 PO3 )4 ]·2H2 O was investigated against S. feltiae
Displays a chain-like structure, containing vertex sharing four-membered rings formed by the connectivity between CoO6 octahedrons and H2PO3- pseudo-tetrahedral units bound through their edges
Summary
Hybrid organic-inorganic materials have attracted a great deal of attention in different fields because of their rich structural chemistry and wide potential applications in ion-exchange, adsorption, separation, and catalysis [1,2,3,4,5,6,7] Within this class of structures, hybrid phosphite continues to attract intense research attention from all facets of material scientists since it promoted the formation of a new range of structures with various architectures and dimensionality [8]. We have reported on the biological activities, that is, its activity against C. albicans, E. coli strains, S. epidermidis, and S. cerevisiae as a first contribution in the investigations conducted by our research group on such research in the field of phosphite materials
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