Chemistry Journal of Moldova

Accepted papers

Iurie Ungureanu, Gheorghe Duca, Ionel Humelnicu, 
Gelu Bourceanu

Field: Physical chemistry and chemical physics
Type: Research paper
8
Dushman reaction, cerium ion, manganese ion, iodine specie.
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Graphical Abstract: This contribution presents investigations into possible effects of Ce3+ and Mn2+ on the reduction of UV-spectral signal for I3- observed e.g. in the Dushman reaction. The potential of the metal ions to form complexes with iodine-containing species was analysed. It was shown that no complex ions are formed between Ce3+ and Mn2+ metals ions with IO3-, I-, I2 species. Only the formation of a very weak CeI32+ complex ion was found to occur. An effect of a complex formation on the studied systems could be excluded.

 
 

Downloads: 26

Larisa Postolachi, Vasile Rusu, Tudor Lupascu, Oleg Petuhov

Field: Ecological chemistry
Type: Short communication
diatomite, alkaline treatment, filtration rate.
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Graphical Abstract: The aim of the study was to modify the diatomite from Ghidirim village (Ribnita distinct, Republic of Moldova) with purpose to use it as filter material. The initial diatomite was modified by alkaline treatment with sodium carbonate, and the filtering capacity was evaluated by suction filtration method. The treatment of diatomite by sodium carbonate resulted in an increased filtration rate, recording the most pronounced filtering capacity for diatomite treated with 20% solution of sodium carbonate.


 

Downloads: 8

Gheorghe Duca , Aculina Aricu, Lidia Lungu, Nadejda Tenu, Alexandru Ciocarlan, Yacob Gutu, Ion Dragalin, Alic Barba

Field: Organic chemistry
Type: Research paper
6
sesquiterpenoids, N-substituted amides, heterocyclic amines, diazine, 1,2,4-triazole, carbazole, synthesis.
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Graphical Abstract: The study describes the synthesis of 11-homodrim-6,8-dien-12-oic acid N-substituted amides containing diazine, 1,2,4-triazole and carbazole rings based on commercially available sclareolide. The mentioned compounds were prepared for the first time by interaction of the generated in situ acyl chloride with some heterocyclic amines: 2- and 4-aminopyrimidine, 2-aminopyrazine, 3-amino-1,2,4-triazole and N-aminocarbazole. Their structures were fully elucidated by elemental and spectral analyses (IR, 1H and 13C NMR).


 

Downloads: 11

Natalia Terenti, Marilena Ferbinteanu, Ana Lazarescu

Field: Inorganic and coordination chemistry
Type: Research paper
Co(III) complex, 2,3-pyridinedicarboxylic acid, thermal analysis, X-ray diffraction.
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DOI: http://dx.doi.org/10.19261/cjm.2017.371

Supplementary Material (PDF)
Graphical Abstract: A new Co(III) complex [CoIII(2,3-pdcH)3(H2O)3] (2,3-pdcH – monoanion of 2,3-pyridinedicarboxylic acid) has been synthesized from Co(II) salt at room temperature by using nonhydrothermal method and (NH4)2S2O8 as oxidant. The influence of the type of Co(II) salt used to the synthesis of the final product was investigated. The complex was characterized by elemental analyses, IR and UV-VIS spectroscopy, single crystal X-Ray diffraction and thermogravimetric analyses. The complex crystallizes in the monoclinic space group P21/c. The crystal structure reveals a homoleptic complex with a distorted octahedral geometry, where the ligand acts as monodeprotonated N, O-chelating anion.


 

Downloads: 12

Volodymyr Turov, Viktor Bogatyrev, Tatiana Krupska, Mariia Galaburda, Tudor Lupascu, Igor Povar, Natalia Kokosha

Field: Physical chemistry and chemical physics
Type: Research paper
8
cluster, Enoxil, 1H NMR spectroscopy, polyacrylamide gel, polymer linkage.
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Graphical Abstract: The state of water in a polyacrylamide (PPA) gel has been studied by the 1H NMR spectroscopy. It is shown that the PAA gel can serve as a container for prolonged retention of the Enoxil preparation without changing its chemical composition. At the same time, the molecular structures of Enoxil bind strongly to polymer chains, probably due to the formation of hydrogen-bound complexes with amino and imino groups.

1 - initial dry PAA, 2 - hydrogel PAA, 
3 - hydrogel PAA-Enoxil

Downloads: 12

Is Fatimah, Nurul Indriani

Field: Physical chemistry and chemical physics
Type: Research paper
8
silver nanoparticle, green synthesis, Lantana camara, microwave, ultrasound.
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Graphical Abstract: Green synthesis of silver nanoparticles (AgNPs) using Lantana camara yellow flower extract via microwave irradiation and ultrasound methods was conducted. The research was aimed at evaluating the effect of the synthesis method and also the time of treatment during synthesis on the particle size and antioxidant and antibacterial activities of the AgNPs. Analysis of the nanoparticles was performed using UV-Vis spectroscopy, transmission electron microscope (TEM), particle size analyzer, and Fourier transform infrared spectroscopy (FTIR). The present results support the advantages of plant extract and the green method for the production of nanoparticles for further potential applications.

Downloads: 13

Olena Litsis, Vladimir Ovchynnikov, Tatiana Sliva, Svitlana Shishkina, Vladimir Amirkhanov

Field: Inorganic and coordination chemistry
Type: Research paper
9
lanthanide, carbacylamidophosphate, phosphoryl ligand, six-coordinate lanthanide complex, electronic spectrum.
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Graphical Abstract: New mononuclear six-coordinate lanthanide coordination compounds [Ln (HL)3Cl3] (HL = (2,2,2-trichloro-N-(dipiperidin-1-yl-phosphoryl)acetamideCCl3C(O)N(H)P(O)[N(CH2)5]2, carbacylamidophosphate (CAPh) type ligand) have been synthesized from non-aqueous solutions. The complexes have been characterized by elemental analysis, spectroscopic methods (FTIR, 1H- and 31P-NMR, UV-Vis). The structure of [Sm(HL)3Cl3] has been further confirmed by single crystal X-ray diffraction analysis.

 
 

Downloads: 39