Chemistry Journal of Moldova

2018 Volume 13, no.1

LUMINESCENT THIN FILMS BASED ON N-(DIPHENYLPHOSPHORYL)BENZAMIDE EuIII AND TbIII COMPLEXES FOR LIGHT EMITTING DIODE TECHNOLOGY

Author(s):

Nataliia Kariaka, Olena Litsis, Yuriy Kolomzarov, Paula Gawryszewska, Sergii Smola, Nataliia Rusakova, Victor Trush, Tatiana Sliva, Vladimir Amirkhanov


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 54-62
Keywords: lanthanide complex, photoluminescence, carbacylamidophosphate, chelate ligand, thin film.
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DOI: http://dx.doi.org/10.19261/cjm.2018.473
 
Abstract (PDF)
Graphical Abstract: The lanthanides coordination compounds LnL3, LnL3Phen and LnL3Dipy with bulky aryl-functionalised carbacylamidophosphate (CAPh) ligand N-(diphenylphosphoryl)benzamide (HL=PhC(O)N(H)P(O)Ph2) were synthesized for luminescent thin films producing. The films were obtained by vacuum evaporation and spin coating methods and exhibited intensive monochromatic photoemission with decay times equal to 0.78 1.34 ms.



 

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HETEROTRINUCLEAR [Fe2IIINiII]-µ3-OXO-CLUSTER BASED ON SALICYLIC ACID. SYNTHESIS, STRUCTURE AND PHYSICO-CHEMICAL PROPERTIES

Author(s):

Viorina Gorinchoy, Vera Zubareva, Elena Melnic, Victor Kravtsov


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 46-53
Keywords: heterotrinuclear μ3-oxo complex, X-ray, IR analysis, Mössbauer spectrum, TG data.
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DOI: http://dx.doi.org/10.19261/cjm.2018.483
 
Abstract (PDF)
Graphical Abstract: The reaction between iron and nickel salts with ammonium salicylate results in the formation of a new trinuclear heterometallic complex 
[hexa-µ2-salicylato-µ3-oxo-(methanol)(dimethylformamide) aquadiiron(III) nickel(II)] methanol dimethylformamide. The synthesized [Fe2NiO(SalH)6(CH3OH)(DMF)(H2O)]•DMF•CH3OH complex crystallizes in the monoclinic space group C2/c. The IR and Mössbauer spectra and thermal properties were studied.

 
 

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CHROMATOGRAPHIC ANALYSIS OF SILYBUM MARIANUM (L.) GAERTN. FATTY OIL

Author(s):

Alexandru Ciocarlan, Ion Dragalin, Aculina Aricu, Nina Ciocarlan, Cristina Stavarache, Mariana Deleanu


Field: Natural product chemistry and synthesis
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 63-68
Keywords: Silybum marianum fatty oil, GC analysis, fatty acids methyl ester, RP-HPLC analysis, α-tocopherol.
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DOI: http://dx.doi.org/10.19261/cjm.2018.484   

Abstract (PDF) 
Graphical Abstract: The present paper describes biochemical (fatty oil) composition of Silybummarianum (L.) Gaertn. of Moldovan origin. The oil content of the seeds was approximately 25%. Linoleic acid (C18:2), an essential polyunsaturated fatty acid, is the most abundant (48.88%), followed by monounsaturated oleic acid (C18:1, 31.94%) and saturated palmitic acid (C16:0, 7.61%). The RP-HPLC analysis of tocopherols composition, showed as main components α-tocopherol (23.45 mg/100g) and γ–tocopherol (5.60 mg/100g). Based on the obtained results, it was shown that the extracted oil from milk thistle seeds is rich in essential fatty acids (about 50%) and tocopherols (29.09 mg/100g) and it can be used in food preparation. 


 

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OXIDO- AND DIOXIDOVANADIUM(V) COMPLEXES WITH O-VANILLIN SEMICARBAZONE: SYNTHESIS AND CRYSTAL STRUCTURE

Author(s):

Lidia Cuba, Paulina Bourosh, Victor Kravtsov, Elena Gorincioi, Diana Dragancea


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 36-45
Keywords: oxidovanadium(V), dioxidovanadium(V), o-vanillin semicarbazone, NMR spectroscopy, X-ray diffraction study.
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DOI: http://dx.doi.org/10.19261/cjm.2018.477   

Abstract (PDF)
Supplementary Material (PDF)
Graphical Abstract: Two vanadium(V) complexes comprising VO3+ and VO2+ cores with o-vanillin semicarbazone (H2L) have been synthesized and characterized by IR, NMR spectroscopies and single-crystal X-ray diffraction study. The coordination polyhedra are a O5N distorted octahedron in the mono-oxidovanadium complex [VO(HL)(EtO)(EtOH)0.6(H2O)0.4][VO(HL)(SO4)(EtO)]•0.4EtOH (1) and a O4N square-pyramid in the dioxidovanadium compound [VO2(HL)]•2H2O (2). 


 

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STRUCTURAL ASPECTS OF LACTOFERRIN AND SERUM TRANSFERRIN OBSERVED BY FTIR SPECTROSCOPY

Author(s):

Gheorghe Duca, Lilia Anghel, Raul Victor Erhan


Field: Analytical chemistry
Type: Short communication
Issue: 2018 Volume 13, no.1
Pages: 111-116
Keywords: human lactoferrin, human serum transferrin, FTIR spectroscopy, amino acid, secondary structure.
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DOI: http://dx.doi.org/10.19261/cjm.2018.482 

Abstract (PDF) 
Graphical Abstract: In this work, Fourier transform infrared spectroscopy was used to highlight the structural differences between the human lactoferrin and human serum transferrin. The results clearly show the structural differences of human lactoferrin and human serum transferrin. The second derivative analysis of the FTIR spectra allows the direct identification of secondary structure components of the human lactoferrin and human serum transferrin.



 

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A NOVEL 2D ZINC(II) COORDINATION POLYMER BASED ON 2,2'-BIPYRIDINE-4,4'-DICARBOXYLIC ACID: SYNTHESIS, CRYSTAL STRUCTURE AND PHOTOLUMINESCENCE PROPERTY

Author(s):

Aliona Vitiu, Lilia Croitor, Anatolii Siminel, Eduard Coropceanu, Paulina Bourosh


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 30-35
Keywords: zinc, 2,2′-bipyridine-4,4′-dicarboxylic acid, X-ray, luminescence.
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DOI: http://dx.doi.org/10.19261/cjm.2017.479   

Abstract (PDF) 
Graphical Abstract: A new two dimensional 2,2′-bipyridine-4,4′-dicarboxylate Zn(II) coordination polymer was obtained by hydrothermal synthesis and characterized by IR spectrum and single-crystal X-ray diffraction. The crystal lattice hosts the N,N-dimethylformamide and water solvent molecules. The new material reveals blue-orange luminescence upon excitation with ultraviolet light.



 

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GREEN SYNTHESIS OF POLYSUBSTITUTED QUINOLINES AND XANTHENE DERIVATIVES PROMOTED BY TARTARIC ACID AS A NATURALLY GREEN CATALYST UNDER SOLVENT-FREE CONDITIONS

Author(s):

Farzaneh Mohamadpour, Malek Taher Maghsoodlou, Mojtaba Lashkari, Reza Heydari, Nourallah Hazeri


Field: Organic chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 74-86
Keywords: tartaric acid, polysubstituted quinolines, 12-aryl-tetrahydrobenzo[α]xanthene-11-ones, 1,8-dioxo-octahydroxanthenes, 14-aryl-14H-dibenzo[α,j]xanthenes.
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DOI: http://dx.doi.org/10.19261/cjm.2017.449  

Abstract (PDF) 
Supplementary Material (PDF)
Graphical Abstract: This method reported the use of tartaric acid as a green and highly efficient catalyst for the convenient synthesis of polysubstituted quinolines and xanthenes derivatives in excellent yields under solvent-free conditions. The main advantages of this one-pot procedure are the green and economic availability of the catalyst, simple experimental and work-up procedures.


 

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PLASMA-CHEMICAL SYNTHESIS OF SILVER NANOPARTICLES IN THE PRESENCE OF CITRATE

Author(s):

Margarita Skіba, Alexander Pivovarov, Anna Makarova, Victoria Vorobyova


Field: Ecological chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 7-14
Keywords: nanoparticle, silver, stabilization, plasma, antibacterial.
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DOI: http://dx.doi.org/10.19261/cjm.2018.475   
 
Abstract (PDF)
Graphical Abstract: The contact non-equilibrium low-temperature plasma technique is used to synthesize silver nanoparticles (AgNPs) employing trisodium citrate as capping agent. The AgNPs were characterized using UV-Vis spectroscopy, scanning electron microscopy, X-ray diffraction and zeta potential analysis. Additionally, the antibacterial properties of the synthesized AgNPs were assessed. 


 

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THE POSSIBILITY OF Ce3+ AND Mn2+ COMPLEX IONS FORMATION WITH IODINE SPECIES IN A DUSHMAN REACTION

Author(s):

Iurie Ungureanu, Gheorghe Duca, Ionel Humelnicu, 
Gelu Bourceanu


Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 103-110
Keywords: Dushman reaction, cerium ion, manganese ion, iodine specie.
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DOI: http://dx.doi.org/10.19261/cjm.2017.464

Abstract (PDF) 
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.

 
 

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CRYSTAL STRUCTURE AND CHARACTERIZATION OF NEUTRAL COBALT(III) 2,3-PYRIDINEDICARBOXYLATE COMPLEX

Author(s):

Natalia Terenti, Marilena Ferbinteanu, Ana Lazarescu


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 24-29
Keywords: 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

Abstract (PDF)
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: 23