Surface adsorption of 4,4′-dithiopyridine and 2,2′-dithiopyridine on silver nanoparticles Abstract A detailed vibrational study on the isomers 2,2′-dithiodipyridine and 4,4′-dithiodipyridine was carried out. These organic ligands are of great interest as possible linkers in the fabrication of nanostructures, and therefore a study on the adsorption modes of both ligands at silver surfaces is presented. Orientational…
Encapsulation of sodium nimesulide and percursors in beta-cyclodextrin Abstract Crystalline 1:1 inclusion complexes with beta-cyclodextrin (beta-CD) and the sodium salt of nimesulide (4-nitro-2-phenoxymethanesulfonanilide), and the sodium salt of the derivative 2-phenoxymethanesulfonanilide, have been prepared by co-precipitation from aqueous solution. The presence of true inclusion complexes was supported by elemental analysis, thermogravimetry and powder X-ray diffraction….
Study of the inclusion compound formed between a luminescent europium(III) beta-diketonate complex and gamma-cyclodextrin. Abstract A 1 : 1 inclusion compound between γ-CD and the tris chelate complex Eu(NTA)3·2H2O [NTA = 1-(2-naphthoyl)-3,3,3-trifluoroacetone)] was prepared and characterized in the solid-state by powder X-ray diffraction, thermogravimetric analysis, FTIR, 13C CP MAS NMR and photoluminescence spectroscopy. Possible host-guest…
Experimental and theoretical evidences of C-H…O hydrogen bonding in liquid 4-fluorobenzaldehyde Abstract The presence of C-H⋅⋅⋅O hydrogen bonds in liquid 4-fluorobenzaldehyde has been studied by a combination of theoretical and spectroscopic methods. Ab initio calculations yielded bond energies and preferred bonding geometries, and the calculated spectroscopic properties have been compared with the experimental results. The…
Immobilisation of rhodium acetonitrile complexes in ordered mesoporous silica Abstract Rhodium acetonitrile complexes have been immobilised in the mesoporous silica MCM-41 by pore volume impregnation of a solution of the compound [Rh2(CH3CN)10](BF4)4 in acetonitrile. Powder XRD and N2 adsorption–desorption analysis of the derivatised material confirmed that the textural properties of the hexagonally ordered host were…
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