Chemistry Journal of Moldova

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.



 

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.

 

 

 

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. 


 

DOI: http://dx.doi.org/10.19261/cjm.2018.477   

Abstract (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). 


 

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.



 

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.



 

DOI: http://dx.doi.org/10.19261/cjm.2017.449  

Abstract (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.


 

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. 


 

 

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 I^₃- 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 IO^₃-, 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.

 
 

Graphical Abstract: A new Co(III) complex [Co^III(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.