Chemistry Journal of Moldova

Accepted papers

Olesea Cuzan-Munteanu, Silvia Melnic, Sergiu Shova

Field: Inorganic and coordination chemistry
Type: Research paper
8
iron cluster, mixed valence, X-ray analysis, µ3-oxo, crystal structure, hydrogen bond.
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Graphical Abstract: This paper reports on the synthesis of a new trinuclear homometalic mixed-valent iron carboxylate cluster with furan-2-carboxylic acid. The complex with the formula [Fe2IIIFeIIO(C4H3OCOO)6(H2O)3]∙0.5CH3CN•2.25H2O was characterized by X-ray analysis that revealed that the compound crystalizes in the triclinic centrosymmetric group P-1, with the following unit cell parameters: a = 10.2758(6)Å, b = 11.5991(9) Å, c = 19.7349(15) Å, α = 105.060(7)°, β =  94.216(6)°, γ = 101.662(6)°.


 

Downloads: 13

Yudi Wicaksono, Dwi Setyawan, Siswandono Siswandono

Field: Physical chemistry and chemical physics
Type: Research paper
8
ketoprofen, multicomponent crystallization, solvent evaporation, solubility, dissolution rate.
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Graphical Abstract: The study was aimed at increasing solubility and dissolution rate of ketoprofen by using multicomponent crystallization approach with nicotinamide as additional material. The multicomponent crystallization was carried out by solvent evaporation method using 2-propanol as solvent. The solubility and dissolution test showed that the ketoprofen-nicotinamide multicomponent crystal has solubility and dissolution rate significantly higher than the solubility and dissolution rate of the pure ketoprofen.


 

Downloads: 20

Elena Gorincioi, Eduard Coropceanu

Field: Inorganic and coordination chemistry
Type: Research paper
NMR, zinc, cadmium, oxime, homodinuclear complex, coordination polymer.
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Graphical Abstract: A series of homobi- and polynuclear zinc and cadmium coordination compounds supported by 1,2-cyclohexanedionedioxime and bridging bidentate ligands: 4,4'-bipyridyl, 1,2-bis(4-pyridyl) ethane, 1,3-bis(4-pyridyl) propane and dipiridil sulfide were characterized by the experimental techniques of 1H and 13C NMR spectroscopy. Individual NMR data of compounds are consistent with their assignment as complexes.


 

Downloads: 22

Gheorghe Duca, Mihai Ciobanu, Tudor Lupascu, Igor Povar

Field: Physical chemistry and chemical physics
Type: Research paper
5
activated carbon, adsorption heat, entropy, exothermic process, strontium ion.
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Graphical Abstract: The adsorption of strontium ions from aqueous solutions on nut shells activated carbons (samples CAN-7 and CAN-8) at different temperatures has been studied. The isotherm of adsorption of strontium ions from aqueous solutions on activated carbon CAN-7 has two inflection points at relatively small and high equilibrium concentrations. As the temperature increases, the adsorption values decrease, which indicates that the adsorption process is exothermic.


 


Downloads: 19

Oksana Stavinskaya, Iryna Laguta, Olga Kazakova, Pavlo Kuzema, Tudor Lupascu

Field: Physical chemistry and chemical physics
Type: Short communication
4
Enoxil, biomolecules, fumed silica, composite, hygroscopicity.
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Graphical Abstract: Enoxil-silica composites with various Enoxil-to-silica ratios were prepared by mechanical mixing of the biologically active Enoxil and fumed silica powders. The hygroscopic properties of the composites were studied by the gravimetric method. . It was found that hygroscopicity is reduced by 30÷40% when the Enoxil-to-silica mass ratio in the composites is 0.15÷0.35.

 Holding time in desiccators: 92 (1), 141 (2) and 365 (3) days.

 

Downloads: 29