JSCS Vol 80, No 6
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J. Serb. Chem. Soc.
80 (6) 731–738 (2015)
UDC 547.836.3+547.412.11:544.433.21+547–304.2+547.752+547.567;
JSCS–4752; doi: 10.2298/JSC141124021I; Original
scientific paper
An investigation of
nucleophilic substitution reactions of 2,3-dichloro-1,4-naphthoquinone with
various nucleophilic reagents
CEMIL IBIS, AHMED
HASSEN SHNTAIF, HAKAN BAHAR and
SIBEL SAHINLER AYLA
Department of Chemistry, Faculty of Engineering, Istanbul University, 34320, Avcilar, Istanbul, Turkey
(Received 24 November
2014, revised 26 February, accepted 1 March 2015)
Novel N-,
N,S- and N,O-substituted naphthoquinone compounds
were prepared by the reactions of 2,3-dichloro-1,4-naphthoquinone (1) and the corresponding nucleophiles
in the presence of chloroform and triethylamine or an ethanolic solution of Na2CO3. The structures of the novel naphthoquinone
compounds were characterized by microanalysis, FT-IR, 1H-NMR, 13C-NMR, MS and cyclic voltammetry.
Keywords: 1,4-naphthoquinone; thioethers;
amine; indolylquinones.
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OnLine: 16. 03. 2015. Cited by
J. Serb. Chem. Soc.
80 (6) 739–747 (2015)
UDC 547.821–116+547.828–116+542.913+547.587.51:615.28–188;
JSCS–4753; doi: 10.2298/JSC140804004L; Original
scientific paper
Synthesis of modified pyridine and bipyridine substituted
coumarins as potent antimicrobial agents
HEMALI B. LAD, RAKESH R. GIRI, YOGITA L. CHOVATIYA and DINKAR I. BRAHMBHATT
Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388120, Gujarat, India
(Received 4 August
2014, revised 8 January, accepted 11 January 2015)
In the search
for new antimicrobial agents, a series of new modified pyridine and bipyridine
substituted coumarins 5a–y was designed and synthesized by
adopting a molecular hybridization strategy. All the synthesized compounds were
evaluated for their in vitro antimicrobial activity using the broth
dilution method against selected bacterial (Gram-positive and Gram-negative)
and fungal strains. Compounds 5a, 5f, 5g, 5n, 5r, 5t, 5w, 5x and 5y demonstrated promising antibacterial activity, while the other
derivatives showed comparable activity to those of the standard drugs used as
references.
Keywords: coumarins; bipyridines; Krohnke
reaction; antimicrobial activity; broth dilution method.
Full Article
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Cited by
J. Serb. Chem. Soc.
80 (6) 749–754 (2015)
UDC 547.657:576.314:541.132.3; JSCS–4754; doi: 10.2298/JSC141201012P; Short
communication
SHORT
COMMUNICATION
The influence of naphthenic acids and their fractions on cell
membrane permeability
KSENIJA PAVLOVIĆ, LJUBICA GRBOVIĆ, BOJANA VASILJEVIĆ, ANDREA
ŽUPUNSKI*, MARINA PUTNIK-DELIĆ*, IVANA MAKSIMOVIĆ* and SLAVKO KEVREŠAN*
Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Serbia
*Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, Serbia
(Received 1
December 2014, revised 29 January, accepted 3 February 2015)
The influence
of naphthenic acids (NAs) mixture and their narrow fractions (called NA pH 4,
pH 8 and pH 10) on the permeability of beetroot cell membrane was examined. The
results showed that the effect depends on the treatment duration, concentration
and the structures of the NAs. Longer treatment of plant cell membranes with
sodium naphthenate (Na-naph) resulted in an increase in the membrane
permeability (e.g., a 4-hour treatment with Na-naph (c = 100 μmol L-1) increased the membrane permeability by about
3 times, while prolongation of treatment to 24 h resulted in an 18-fold increase
in the effect). NAs in the concentration range from 0.1 to 10 µmol L-1 did not change membrane permeability, while the
membrane permeability increased linearly with increasing concentration from 10–100
μmol L-1. The fraction pH 8, where bi- and
tricyclic carboxylic acids are the most abundant, expressed the strongest
effect. These structures were predominant in the total NAs mixture as well. This
could explain the similar, but slightly weaker effect of the mixture, compared to
the effect of the NAs present in fraction pH 8. The effect of NAs on beetroot
cell membrane was between the effects of the tested anionic (SDS and LS) and
non-ionic surfactants (Triton X-100).
Keywords: naphthenic acids (NAs); naphthenic acid
fractions; physiological activity; cell membranes permeability.
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Cited by
J. Serb. Chem. Soc. 80 (6) 755–766 (2015)
UDC 547.1’13+546.814+547.78+547.367:615.281/.282–188;
JSCS–4755; doi: 10.2298/JSC140711010P;
Original scientific paper
Synthesis and
spectroscopic characterization of mononuclear/binuclear organotin(IV) complexes
with 1H-1,2,4-triazole-3-thiol:
Comparative studies of their antibacterial/antifungal potencies
BUSHRA PARVEEN,
IFTIKHAR HUSSAIN BUKHARI, SAIRA
SHAHZADI*, SAQIB ALI*, SHABBIR
HUSSAIN, KULSOOM GHULAM ALI and
MUHAMMAD SHAHID**
Department of
Chemistry, GC University, Faisalabad, Pakistan
*Department of Chemistry, Quaid-i-Azam University, Islamabad
45320, Pakistan
**Department of
Chemistry and Biochemistry, University of Agriculture, Faisalabad-38000,
Pakistan
(Received 11 July 2014, revised 30 January, accepted
21 February 2015)
A series of di-
and tri-organotin(IV) complexes of the general formula, R2(Cl)SnL (1: R = Me; 2:
R = Bu) and R3SnL (3: R
= Bu; 4: R = Ph) were synthesized by refluxing equivalent molе ratios of organotin(IV) chlorides (R2SnCl2/R3SnCl) with 1H-1,2,4-triazole-3-thiol
(LH) in dry methanol. The synthesized complexes (1–4) were
further treated with CS2 and R2SnCl2/R3SnCl in 1:1:1
mole ratio to yield homobimetallic complexes of the types R2(Cl)SnLCS2Sn(Cl)R2 (5:
R = Me; 6: R = Bu) and R3SnLCS2SnR3 (7: R = Bu; 8: R = Ph). The ligand and the complexes were characterized
by elemental microanalysis (CHNS), FT-IR
and multinuclear NMR (1H- and 13C-), and electron
ionization mass spectrometry. The IR data demonstrated that the dithiocarbamate
donor site of the ligand acts in a bidentate manner and that the geometry
around Sn(IV) is trigonal bipyramidal in the solid state. The 1H- and 13C-NMR data supported the tetrahedral geometry
with thiol donor sites of the ligand while tetra- and penta-coordinated
environments around dithiocarboxylate bound tin(IV) in the solution state.
Mass spectrometric data supported well the structures of the synthesized
complexes. The homobimetallic derivatives were found more active than the mononuclear
organotin(IV) compounds and free ligand against various strains of bacteria and
fungi.
Keywords: homobimetallic complex; organotin chloride;
NMR; IR; mass spectra; antimicrobial study; 1H-1,2,4-triazole-3-thiol; dithiocarboxylate.
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164 kB Supplementary Material PDF 69 kB
Available OnLine: 10. 02. 2015.
Cited by
J. Serb. Chem. Soc.
80 (6) 767–777 (2015)
UDC 519.677+543.637:546.32+547.416+547.233’821:632.954;
JSCS–4756; doi: 10.2298/JSC141224008M;
Original scientific paper
Analysis of the chemical reactivity of aminocyclopyrachlor
herbicide through the Fukui function
LUIS HUMBERTO MENDOZA-HUIZAR
Universidad Autónoma del Estado de Hidalgo, Área Académica de
Química Químicas, Mineral de
(Received 25 December 2014, Accepted 25 January 2015)
The global and
local DFT reactivity descriptors were calculated at the MP2/6-311++G (2d,2p)
level of theory for aminocyclopyrachlor herbicide in the aqueous phase. Global
reactivity descriptors, such as ionization energy, molecular hardness,
electrophilicity and total energies, were calculated to evaluate the reactivity
of aminocyclopyrachlor. The local reactivity was evaluated through the Fukui
function. The obtained results suggest that the cationic and
dipolar forms of aminocyclopyrachlor exhibit similar global reactivity and are
susceptible to de-amination and decarboxylation. In addition, opening of the
ring might become feasible through free radical attacks on the neutral form,
while a similar process is caused by nucleophilic attacks on the anionic form.
Keywords: aminocyclopyrachlor; reactivity;
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Available OnLine: 01. 02. 2015.
Cited by
J. Serb. Chem. Soc.
80 (6) 779–787 (2015)
UDC 546.57+539.12+549.67:544.726+66.094.2:546.49–71;
JSCS–4757, doi: 10.2298/JSC140729020K; Original scientific paper
Anisotropic
silver nanoparticles deposited on zeolite A for selective Hg2+
colorimetric sensing and antibacterial studies
ALIREZA KHORSHIDI, BEHROOZ
HEIDARI and HAMIDREZA INANLU
Department of
Chemistry, Faculty of Sciences, University of Guilan, P. O. Box 41335-1914,
Iran
(Received 29 July 2014, revised 24 February, accepted
26 February 2015)
Silver
nanoparticles deposited on the surface of zeolite A were prepared via the
post ion-exchange reduction and reduction–deposition methods. The formation of
silver nanoparticles on the surface of zeolite A was verified by surface
plasmon spectra using diffuse reflectance spectroscopy and ultraviolet–visible
spectroscopy. The morphology of the prepared samples was characterized by X-ray
diffraction and scanning electron microscopy. Furthermore, silver nanoparticles
deposited on the zeolite A after fixation of rhodamine B dye molecules on them
were successful in the selective detection of Hg2+. After treatment with the so-obtained sensor, a
colour change from colourless to pink was visible to the naked eye for concentrations
of the Hg2+ solution down to 1.0×10-8 mol L-1. Antibacterial tests demonstrated the multifunctional application of
the silver nanoparticles deposited on zeolite A.
Keywords: sensor; zeolite A; silver;
nanoparticle; rhodamine B; mercury.
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OnLine: 01. 03. 2015. Cited by
J. Serb. Chem. Soc.
80 (6) 789–799 (2015)
UDC 577.164.1+544.6.076.32–039.26:543.552; JSCS–4758 doi:10.2298/JSC131216046K; Original scientific paper
Voltammetric determination of carbidopa and folic acid using a
modified carbon nanotubes paste electrode
NASRIN KESHTKAR*,**, MOHAMMAD ALI TAHER* and HADI BEITOLLAHI***
*Department of Chemistry, Shahid Bahonar University of Kerman, P. O. Box 76175-133, Kerman, Iran
**Young Researchers Society, Shahid Bahonar University of Kerman, P. O. Box 76175-133, Kerman, Iran
***Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
(Received 26 December 2013, revised 11 April, accepted 17 April
2014)
A novel
electrochemical sensor for the selective and sensitive detection of carbidopa
in the presence of a large excess of folic acid at physiological pH was
developed by the bulk modification of a carbon paste electrode (CPE) with
carbon nanotubes (CNTs) and vinylferrocene. Large peak separation, good
sensitivity and stability allow this modified electrode to be used for the analysis
of carbidopa individually and simultaneously along with folic acid. Applying square wave voltammetry (SWV), a linear
dynamic range of 1.0×10-6–7.0×10-4 M with a detection limit of
2.0×10-7 M was obtained for carbidopa. Finally, the
proposed method was applied to the determination of carbidopa and folic acid in
a urine sample.
Keywords: carbidopa; folic acid; carbon
nanotubes; modified electrodes.
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J. Serb. Chem. Soc. 80 (6) 801–804 (2015)
UDC 546.34+546.33+546.3–71+544.6.076.2–145.2;
JSCS–4759; doi: 10.2298/JSC141119127V; Extended
abstract
EXTENDED
ABSTRACT
Comparison of lithium and sodium intercalation materials·
MILICA VUJKOVIĆ
Faculty of Physical Chemistry, University in Belgrade, Studentski trg 12, 11000 Belgrade, Serbia
(Received 19
November, revised 14 December, accepted 25 December 2014)
The low
abundance of lithium in the Earth’s crust and its high participation in overall
cost of lithium-ion batteries incited intensive investigation of sodium-ion
batteries, in the hope that they may become similar in their basic characteristics:
specific energy and specific power. Furthermore, over the last years, research
has been focused on the replacement of the organic electrolytes of Li- and
Na-ion batteries by aqueous electrolytes, in order to simplify the production
and improve safety of use. In this lecture, some recent results on selected intercalation
materials are presented: layered structure vanadium oxides, olivine and nasicon
phosphates, potentially usable in both Li and Na aqueous rechargeable
batteries. After their characterization by X-ray diffraction and electron
microscopy, the electrochemical behavior was studied by both cyclic voltammetry
and chronopotentiometry. By comparing the intercalation kinetics and coulombic
capacity of these materials in LiNO3 and NaNO3 solutions,
it was shown that the following ones: Na1.2V3O8, Na2V6O16/C, NaFePO4/C and NaTi2(PO4)3/C may be used as electrode materials
in aqueous alkali-ion batteries.
Keywords: sodium and lithium
storage capacity; metal-ion aqueous batteries.
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Available OnLine: 25. 12. 2014. Cited by
J. Serb. Chem. Soc. 80 (6) 805–817 (2015)
UDC 27–526.62:7.023.1–037.1+547.97–035.67:543.4+543.424.2; JSCS–4760;
doi: 10.2298/JSC140722099D; Original scientific paper
Spectroscopic
investigation of two Serbian icons painted on canvas
LJILJANA
DAMJANOVIĆ, OLGICA MARJANOVIĆ, MILICA MARIĆ STOJANOVIĆ*, VELIBOR ANDRIĆ** and UBAVKA B. MIOČ
University of
Belgrade-Faculty of Physical Chemistry, Studentski trg 12–16, 11000 Belgrade,
Serbia
*National Museum
Belgrade, Trg Republike 1a, 11000 Belgrade, Serbia
**University of
Belgrade-Vinča Institute of Nuclear Sciences, P. O. Box 522, 11000 Belgrade,
Serbia
(Received 22
July, revised 6 October, accepted 8 October 2014)
A
multianalytical study of two Serbian icons, “The Virgin and Child” and “St.
Petka”, painted on canvas by unknown authors was performed in order to identify
the materials used as pigments, binders and the ground layer. The investigated
icons belong to the Museum of the Serbian Orthodox Church in
Keywords: pigments; EDXRF; FTIR spectroscopy; micro-Raman
spectroscopy.
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OnLine: 18. 10. 2014. Cited by
J. Serb. Chem. Soc. 80 (6) 819–826 (2015)
UDC 549.67+547.466+678.743:615.281–188; JSCS–4761; doi: 10.2298/JSC141225017M; Original
scientific paper
Antibacterial
activity of copper-containing clinoptilolite/PVC composites toward clinical
isolate of Acinetobacter baumannii
JELENA K.
MILENKOVIĆ, JASNA J. HRENOVIĆ*, IVANA S. GOIĆ-BARIŠIĆ**, MILOŠ D. TOMIĆ AND
NEVENKA Z. RAJIĆ***1Innovation
Centre of the Faculty of Technology and Metallurgy, University of Belgrade,
11000 Belgrade, Serbia
*Faculty of
Science, Division of Biology, University of Zagreb, 10000 Zagreb, Croatia
**Split
University Hospital and School of Medicine, Department of Clinical
Microbiology, University of Split, 21000 Split, Croatia
***Faculty of
Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia
(Received 25 December 2014, revised 13 February,
accepted 18 February 2015)
The
multidrug-resistant bacteria Acinetobacter baumannii cause serious
hospital infections. Commercial poly(vinyl chloride) (PVC) used for
endotracheal tubes was modified in order to obtain a composite with an antibacterial
effect towards a clinical isolate of A. baumannii ST145. The composites
were prepared by addition of different amounts of copper-containing zeolite
tuff (CuZ) and by successive impregnation with D-tyrosine (D-Tyr) solution. The composites that
were obtained by addition of CuZ (CuZ–PVC) only did not exhibit an
antibacterial effect. The impregnation of the CuZ–PVC by D-Tyr resulted
in an antibacterial effect which was explained by a synergistic effect of CuZ
and D-Tyr. Rheological tests confirmed that the modification of PVC by CuZ
does not affect its processability and reformability.
Keywords: natural
zeolite; multidrug resistance; polymers; poly(vinyl chloride); amino acids.
Full Article - PDF 280 kB
Available OnLine: 22. 02. 2015.
Cited by
J. Serb. Chem. Soc. 80 (6) 827–838 (2015)
UDC 628.336+546.47/.49’56’815:504.054:628.515/.516;
JSCS–4762; doi: 10.2298/JSC140317047G; Original
scientific paper
Heavy metals in Neogene sedimentary rocks as a potential
geogenic hazard for sediment, soil, and surface and groundwater contamination
(eastern Posavina and the Lopare Basin, Bosnia and Herzegovina)
NENAD GRBA*,**, FRANZ NEUBAUER**, ALEKSANDRA
ŠAJNOVIĆ***, KSENIJA STOJANOVIĆ* and
BRANIMIR JOVANČIĆEVIĆ*
*University of Belgrade, Faculty of Chemistry, Studentski trg 12–16, 11000 Belgrade, Serbia
**Paris Lodron University of Salzburg, Department of Geography and Geology, Hellbrunnerstrasse 34,5020 Salzburg, Austria
***University of Belgrade, Center of Chemistry, ICTM, Njegoševa 12, 11000 Belgrade, Serbia
(Received 17
March, revised 28 April, accepted 29 April 2014)
The influence of geochemical processes (weathering, erosion and dilution) of the Internal Dinarides to
the Posavina Neogene Basin and their implication to the pollution of the Sava
River sediments at four sampling sites in the Eastern Posavina (Županja, Brčko, Bosanska Rača and Sremska Mitrovica)
was studied. For this purpose, comparison of
contents of heavy metals (Pb, Zn, Cu, Ni, Cr, Cd, As and Hg) of the Eastern
Posavina sediments with local background values was performed. Sediments from
two boreholes of the Lopare Basin considered as non-polluted and representative
for specific geologic and hydrogeologic system were used for the calculation
of local background values. The aim was to assess whether the observed heavy metals
concentrations at four sampling sites along the Sava River represent background/natural
or anthropogenic contamination.
This task was performed using the geo-accumulation index and total enrichment
factor. According to values of the total enrichment factor (0.25–0.71), the
anthropogenic impact on the investigated area was quite low. The heavy metals
contents in river sediments, soil and groundwater were mainly controlled by
geochemical processes, particularly weathering (chemical proxy of alteration
value ≈ 60). The results also offer novel insights into the elevated geogenic
levels of Cr and Ni in the Eastern Posavina region.
Keywords: pollution; river
sediments; geo-accumulation index; total enrichment factor; weathering.
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Copyright & copy; SHD 2015.
June 28. 2015.
For more information contact: JSCS-info@shd.org.rs