Chemistry Journal of Moldova

DOI: http://dx.doi.org/10.19261/cjm.2018.513  

Abstract (PDF) 

Graphical Abstract: The new complexes [Ni(phen)₃][Ge(HCit)₂]•2H₂O (1), [Ni(phen)₃][Sn(HCit)₂]•3H₂O (2) (where phen is 1,10-phenanthroline, H₄Cit is citric acid) were obtained. The identity, composition, and thermal stability of the complexes were established by elemental analysis, thermogravimetry, and IR spectroscopy. According to the X-ray diffraction data, the bis(citrate)germanate / bis(citrate)stannate [Ge/Sn(HCit)₂]^2- carries out the role of the dianion while two halves of the nickel complexes with phenanthroline [Ni(Phen)₃]²⁺ are cations.


 

DOI: http://dx.doi.org/10.19261/cjm.2018.504

Abstract (PDF) 

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 [Fe₂^IIIFe^IIO(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)°.


 

DOI: http://dx.doi.org/10.19261/cjm.2018.368

Abstract (PDF) 

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.


 

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.2018.477   

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.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.



 

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.


 

DOI: http://dx.doi.org/10.19261/cjm.2017.466

 

Abstract (PDF)
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.

 

 

DOI: http://dx.doi.org/10.19261/cjm.2017.392   

 

Abstract (PDF)
Graphical Abstract: A new synthetic extractive protocol for the synthesis of Cu(II) and Co(III) complexes of bis(2,2/-methylylidenephenol)diaminoethane (H₂BMPDE) in a single simple step was performed. The obtained data indicated the formation of complexes with 1:1 molar ratio of metal:ligand, of distorted square planar and distorted octahedral geometries. In vitro antibacterial screening revealed that the complexes were active against clinically important gram-negative bacteria (Escherichia coli, pseudomonas, and gram-positive bacterium (Staphylococcus aureus). The synthesis of the complexes was optimized to make it more suitable and efficient for industrial scale production.