Vol 78, No 1 - Abstracts

JSCS Vol 78, No 1

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J. Serb. Chem. Soc. 78 (1) 1–13 (2013)

UDC 547.447:66.094.2+546.47’273’11+546.62’214+542.913:547.43; JSCS–4391; doi: 10.2298/JSC120111044S; Original scientific paper

Zn(BH₄)₂/Al₂O₃: A new synthetic method for the efficient and convenient reduction of organic carbonyl compounds to their corresponding alcohols

DAVOOD SETAMDIDEH, BEHROOZ KHEZRI and MEHDI RAHMATOLLAHZADEH

Department of Chemistry, Faculty of Sciences, Mahabad Branch,IslAMic Azad University, Mahabad, 59135-443, Iran

(Received 11 January 2012)

Zn(BH₄)₂ (0.5–2 mmol) in the presence of Al₂O₃ (1 mmol) reduces a variety of organic carbonyl compounds such as aldehydes, ketones, acyloins, α-diketones and α,β-unsaturated carbonyl compounds to their corresponding alcohols. The reduction reactions were realized in THF at room temperature affording high to excellent yields of the products. The chemoselective reduction of aldehydes over ketones was successfully accomplished with this reducing system. In addition, regioselectivity and exclusive 1,2-reduction of conjugated carbonyl compounds to their corresponding allylic alcohols in high to excellent yields was successfully accomplished.

Keywords: Zn(BH4)2; Al2O3; reduction; carbonyl compounds; chemoselective; regioselectivity.

Full Article - PDF 242 KB Available OnLine: 03. 05. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 15–25 (2013)

UDC *norcantharidin+547.75–125+547.6–334; JSCS–4392; doi: 10.2298/JSC120123036P; Original scientific paper

Antioxidant and radical scavenging activities of some norcantharidin and bridged perhydroisoindole derivatives

AYSEGUL PEKSEL*, CUMALI CELIK*^,**, NUKET OCAL* and REFIYE YANARDAG***

*Department of Chemistry, Faculty of Arts and Science, Yildiz Technical University, Davutpasa, Istanbul-34210, Turkey

**Community College, Yalova University, Yalova-77100, Turkey

***Department of Chemistry, Faculty of Engineering, Istanbul University, Avcilar, İstanbul-34320, Turkey

(Received 23 January, revised 15 March 2012)

A series of norcantharidin and bridged perhydroisoindole derivatives were evaluated for their antioxidant and radical scavenging activities. Different in vitro methodologies, such as total reducing power, 1,1-diphenyl-2-picrylhydrazil (DPPH^·) free radical scavenging, superoxide anion radical scavenging and metal chelating activities were used. Among the 11 tested compounds, 7 compounds showed potent reducing power activity and 7 compounds showed potent superoxide anion radical scavenging activity. All the tested compounds exhibited potent free radical scavenging ability. The results showed that the synthesized compounds have effective antioxidant power.

Keywords: norcantharidin; bridged perhydroisoindole; reducing power; superoxide anion radical.

Full Article - PDF 307 KB Available OnLine: 24. 04. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 27–37 (2013)

UDC 633.94:665.52/.54:615.27/.28; JSCS–4393; doi: 10.2298/JSC120409075А; Original scientific paper

Composition, and antioxidant and antimicrobial activities of the essential oils of a full-grown Pinus cembra L. tree from the Calimani Mountains (Romania)

CRISTINA LUNGU APETREI, ADRIAN SPAC*, MIHAI BREBU**, CRISTINA TUCHILUS*** AND ANCA MIRON****

Department of Plant and Animal Biology, School of Pharmacy, University of Medicine and Pharmacy “Grigore T. Popa” – Iasi, Romania

*Department of Physical Chemistry, School of Pharmacy, University of Medicine and Pharmacy “Grigore T. Popa” – Iasi, Romania

**Physical Chemistry of Polymers Laboratory, Petru Poni Institute of Macromolecular Chemistry, Iasi, Romania
***Department of Microbiology, School of Medicine, University of Medicine and Pharmacy “Grigore T. Popa” – Iasi, Romania

***Department of Pharmacognosy, School of Pharmacy, University of Medicine andPharmacy “Grigore T. Popa” – Iasi, Romania

(Received 9 April, revised 21 June 2012)

The chemical composition and the antioxidant and antimicrobial effects of the essential oils of Pinus cembra L. needles and twigs were investigated in this study. The chemical composition was analyzed using both the GC and GC–MS techniques. α-Pinene (69.14 %) was the major constituent of the needle essential oil while the twig essential oil was characterized by a high content of limonene+β-phellandrene (40.97 %) and α-pinene (24.94 %). The needle and twig essential oils showed weak DPPH radical scavenging effects. In the antimicrobial assays, both essential oils showed high activity against Sarcina lutea and Staphylococcus aureus but no activity against Bacillus cereus, Escherichia coli and Pseudomonas aeruginosa. The needle and twig essential oils had similar antimicrobial effects against Sarcina lutea. The twig essential oil was more active against S. aureus than the needle essential oil and also exhibited a moderate activity against Candida albicans.

Keywords: cembran pine; α-pinene; limonene; DPPH radical; Staphylococcus aureus; Candida albicans.

Full Article - PDF 229 KB Available OnLine: 12. 07. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 39–55 (2013)

UDC 546.562’742’732’712’472’481’492’722’963+547.298.61+542.913:543.42:615.28+88; JSCS–4394; doi: 10.2298/JSC110307062E; Original scientific paper

Metal complexes of N'-[2-hydroxy-5-(phenyldiazenyl)-benzylidene]isonicotinohydrazide. Synthesis, spectroscopic characterization and antimicrobial activity

ABDOU S. El-TABL, MOHAMAD M. E. SHAKDOFA*^,**and ADEL M. E. SHAKDOFA

Department of Chemistry, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt

*Inorganic Chemistry Department, National Research Center, P. O. Box 12622, Dokki, Cairo, Egypt

**Department of Chemistry, Faculty of Sciences and Arts, King Abdulaziz University, Khulais, Saudi Arabia

(Received 7 March 2011, revised 12 June 2012)

A new series of Cu(II), Ni(II), Co(II), Mn(II), Zn(II), Cd(II), Hg(II), VO(II), UO2(II), Fe(III) and Ru(III) complexes of N′-[2-hydroxy-5-(phenyldiazenyl)benzylidene]isonicotinohydrazide (H₂L) was synthesized and characterized by elemental analysis, ¹H-NMR, IR, UV–Vis and ESR spectroscopy, magnetic and thermogravimetric (TG) analyses, and conductivity measurements. The spectral data showed that the ligand behaved as a neutral bidentate (complexes 2, 4–6 and 14), monobasic bidentate (complexes 7 and 9), monobasic tridentate (complexes 3, 8, 10, 11 and 16) or dibasic tridentate (complexes 12, 13 and 15) and was bonded to the metal ions via the carbonyl oxygen atom in the ketonic or enolic form, the azomethine nitrogen atom and/or the deprotonated phenolic hydroxyl oxygen. The ESR spectrum of the solid vanadyl(II) complex 2 showed an axially anisotropic spectrum with eight lines in the low field region and with g_^ > g_|| and A_|| >> A^ relationships, which are characteristics of a distorted octahedral structure with a d_xy ground state. However, the copper(II) complexes 4–6, and the manganese(II) complex 10 showed an isotropic type symmetry, while the copper(II) complexes 3 and 7 showed an axial symmetry type with g_|| > g_^ > g_e, indicating a covalent bond character. The antibacterial and antifungal activities of the ligand and its metal complexes showed low activity compared with the standard drugs (tetracycline for the bacteria and AMphotricene B for the fungi).

Keywords: metal complexes; syntheses; spectral; isonicotinohydrazide; biological activities.

Full Article - PDF 295 KB Supplementary Material PDF 338 KB Available OnLine: 27. 06. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 57–63 (2013)

UDC 547.313.2+547.466.4+547.073.1+546.228.5:548.7; JSCS–4395; doi: 10.2298/JSC120208041V; Short communication

SHORT COMMUNICATION

Stereospecific ligands and their complexes.

Part XIV. Crystal structure of the O,O′-dipropyl ester of N,N′-1,2-ethanediylbis-L-leucine, dihydrochloride

JELENA M. VUJIĆ, SANTIAGO GARCIA-GRANDA*, LAURA MEneNDEZ-TABOADA*, SLAĐANA B. NOVAKOVIĆ** and SREĆKO R. TRIFUNOVIĆ***

Faculty of Agronomy, University of Kragujevac, Cara Dušana 34, 32000 Čačak, Serbia

*University of Oviedo, Faculty of Chemistry, Oviedo, Spain

**Vinča Institute of Nuclear Sciences, Condensed Matter Physics Laboratory, University of Belgrade, P. O. Box 522, 11001 Belgrade, Serbia

***Department of Chemistry, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Serbia

(Received 8 February, revised 24 April 2012)

The bidentate N,N'-ligand precursor, the O,O'-dipropyl ester of N,N′--1,2-ethanediylbis-L-leucine, dihydrochloride, [(S,S)-H4eddl]Cl2, was prepared and its crystal structure is given herein. It crystallizes in a P42 space group of a tetragonal crystal system with a = 16.5620 (2) Å, b = 16.5620 (2) Å, c = 5.2240 (1) Å and Z = 2.

Keywords: crystal structure; tetragonal crystal system; O,O′-dipropyl ester of N,N′-1,2-ethanediylbis-L-leucine, dihydrochloride.

Full Article - PDF 360 KB Available OnLine: 24. 04. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 65–73 (2013)

UDC 536.5.004.12:533.6.013.7:547.854; JSCS–4396; doi: 10.2298/JSC120618066E; Original scientific paper

Effect of temperature on rate of a spin-forbidden transition in uracil and thymine

MIHAJLO ETINSKI

Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12–16, P. O. Box 47, 11158 Belgrade, Serbia

(Received 18 June 2012)

The intersystem crossing rates of uracil and thymine molecules in interaction with a heat bath were studied by means of ab initio methods. The rates were calculated employing the time-dependent approach based on the correlation function. The normal modes of the singlet and triplet electronic states were related by the Duschinsky transformation. The correlation function was calculated using the Condon approximation for the spin–orbit matrix element and harmonic approximation for the nuclear motion. The excess vibrational energy in the initial singlet excited electronic state decreased the rate of triplet formation in uracil and thymine. This decrease was more pronounced for uracil. In addition, it was found that the change of the adiabatic energy gap could significantly modify the rate of triplet formation.

Keywords: excited states; intersystem crossing; correlation function.

Full Article - PDF 349 KB Available OnLine: 27. 06. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 75–83 (2013)

UDC 547.466.22:546.27’171.1:537.212; JSCS–4397; doi: 10.2298/JSC120419046F; Original scientific paper

The effect of electric field on the interaction of glycine with (6,0) single-walled boron nitride nanotubes

DAVOOD FARMANZADEH AND SAMEREH GHAZANFARY

Faculty of Chemistry, University of Mazandaran, P. O. Box 453, Babolsar, I. R. Iran

(Received 12 April 2012)

The interaction between the glycine molecule with the (6,0) zigzag model of single-walled boron nitride nanotubes (BNNTs) with H-terminated at the open end, has been investigated in the presence and absence of an external electric field (EF), using the DFT- B3LYP/6-31G level of theory. The results demonstrated that glycine is chemisorbed on the (6,0) BNNT and this chemical adsorption can be significantly modified by the intensity of an external EF. It was found that increasing the EF strengthens the interaction between glycine and BNNT; thus, adsorption of glycine on BNNT could be controlled by the intensity of the EF. This result might be useful in the design of novel nano-devices, such as nano-sensors.

Keywords: glycine; density functional theory; boron nitride nanotube (BNNT); electric field.

Full Article - PDF 644 KB Available OnLine: 03. 05. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 85–92 (2013)

UDC 544.174.2/.3:544.144.52:512.81; JSCS–4398; doi: 10.2298/JSC120131074S; Original scientific paper

A study of the stretching vibrational spectra of C₁₂₀O and C₁₂₀O₂ by U(2) Lie algebra

RUPAM SEN, ASHIM KALYAN AND RAMENDU BHATTACHARJEE*

Department of Physics, Srikishan Sarda College, Hailakandi-788151, India

*Department of Physics, AssAM University, Silchar-788011, India

(Received 31 January, revised 8 July 2012)

The vibrational energy levels of the endohedral fullerene dimers C₁₂₀O and C₁₂₀O₂ were calculated considering the local HAMiltonian of the Morse potential using algebra. Here, each bond of the molecules was replaced by a corresponding Lie algebra and finally the HAMiltonian was constructed considering the interacting Casimir and Majorana operators. The fundAMental stretching modes of vibration of both dimers C₁₂₀O and C₁₂₀O₂ were then calculated using this HAMiltonian to compare with the results of functional-based tight-binding (DF-TB) calculations.

Keywords: Lie algebra; vibrational spectra; C₁₂₀O; C₁₂₀O₂.

Full Article - PDF 217 KB Available OnLine: 12. 07. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 93–100 (2013)

UDC 677.12+547.422+547.823:66.081+546.57:615.28; JSCS–4399; doi: 10.2298/JSC110922077Y; Original scientific paper

Extraction of Sm(III) and Nd(III) with N,N,N′,N′-tetrabutyl-3-oxy-diglycolAMide from hydrochloric acid

JINHONG YANG, YU CUI, GUOXIN SUN, YONG NIE, GUANGMING XIA AND GENGXIU ZHENG

School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, China

(Received 22 September 2011, revised 13 July 2012)

The behavior of Sm(III) and Nd(III) during extraction with N,N,N′,N′-tetrabutyl-3-oxa-diglycolAMide (TBDGA) in 70% kerosene–30 % n-octanol from hydrochloride acid was studied. The effects of temperature and the concentrations of hydrochloric acid and extractant on the distribution of the rare earth elements were investigated. The extraction mechanism was established and the stoichiometry of the main extracted species was confirm to be SmCl₃·2TBDGA and NdCl₃·2TBDGA for Sm(III) and Nd(III), respectively. The extraction distribution ratio decreased with increasing temperature, which demonstrates that the extraction reaction is exothermic. The IR spectra of the loaded organic phase and free extractant were recorded and are discussed.

Keywords: 3-oxa-diglycolAMide; hydrochloric acid; stoichiometry; lanthanides; distribution ratio.

Full Article - PDF 322 KB Available OnLine: 23. 07. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 101–114 (2013)

UDC 546.185–034.1+669.14+621.793:544.351.3; JSCS–4400; doi: 10.2298/JSC120706096P; Original scientific paper

Determination of surface coverage of iron-phosphate coatings on steel using the voltAMmetric anodic dissolution technique

JOVAN P. POPIĆ, BORE V. JEGDIĆ*, JELENA B. BAJAT**, MIODRAG MITRIĆ*** and VESNA B. MIŠKOVIĆ-STANKOVIĆ**

ICTM-Department of Electrochemistry, University of Belgrade, Njegoševa 12, Belgrade, Serbia

*Institute GOŠA, Milana Rakića 35, 11000 Belgrade, Serbia

**Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, P. O. Box 3503, 11120 Belgrade, Serbia

***Vinča Institute of Nuclear Sciences, P. 0. Box 522, 11001 Belgrade, Serbia

(Received 6 July, revised 13 September 2012)

In this study, the effect of deposition time and concentration of NaNO2 in the phosphate bath on the surface morphology of iron-phosphate coatings on low carbon steel was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The composition of iron-phosphate coatings was determined using energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD), while surface coverage was evaluated by the voltAMmetric anodic dissolution (VAD) technique in the borate solution. The addition of NaNO₂ to the phosphate bath significantly increased the surface coverage since better packed crystals of smaller size, which favour the phosphate nucleation, were obtained. It was also shown that prolonged deposition time increased the surface coverage, coating roughness and crystal size in the lateral direction, altering also the crystal shape from large platelets non-uniformly distributed on the steel surface during the initial time to better-packed lAMinated and needle-like structures during prolonged exposure.

Keywords: low carbon steel; iron-phosphate coatings; surface coverage; VAD; AFM.

Full Article - PDF 556 KB Available OnLine: 25. 09. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 115–127 (2013)

UDC 546.72+543.421+66.061+66.011; JSCS–4401; doi: 10.2298/JSC120103055М; Original scientific paper

Optimization of a cloud point extraction procedure with response surface methodology for the quantification of iron by means of flAMe atomic absorption spectrometry

HOSSEIN ABDOLMOHAMMAD-ZADEH, ABDOLHOSSEIN NASERI* and GOLAMHOSSEIN SADEGHI

Department of Chemistry, Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, 35 Km Tabriz-Marageh Road, P. O. Box 53714-161, Tabriz, Iran

*Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran

(Received 3 January, revised 21 May 2012)

A simple micelle-mediated phase separation method has been developed for the pre-concentration of trace levels of iron as a prior step to its determination by flAMe atomic absorption spectrometry (FAAS). The method is based on the cloud point extraction (CPE) of iron using the non-ionic surfactant poly(ethyleneglycol–mono-p-nonylphenylether) (PONPE 7.5) without the addition of any chelating agent. Several variables affecting the extraction efficiency were studied and optimized utilizing a central composite design (CCD) and a three-level full factorial design. Under the optimum conditions, the limit of detection (LOD), limit of quantification (LOQ) and pre-concentration factor were 1.5 µg L_-1, 5.0 µg L_-1 and 100, respectively. The relative standard deviation (RSD) for six replicate determinations at 50 µg L_-1 Fe(III) level was 1.97 %. The calibration graph was linear in the range of 5–100 µg L_-1, with a correlation coefficient of 0.9921. The developed method was validated by the analysis of two certified reference materials and applied successfully to the determination of trace AMounts of Fe(III) in water and rice sAMples.

Keywords: iron; ligand-less cloud point extraction; central composite design; full factorial design; flAMe atomic absorption spectrometry; rice sAMples.

Full Article - PDF 286 KB Available OnLine: 22. 05. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 129–136 (2013)

UDC 665.75+66.094.522.8:548.3+549.514.6:547.313.2+547.269.1; JSCS–4402; doi: 10.2298/JSC120112034S; Original scientific paper

Deep desulphurization of gas oil and model compounds by an anatase nanocomposite sandwich-type polyoxometalate as a novel, reusable and green nano mercaptan scavenger

ABDOLLAH FALLAH SHOJAEI, MOHAMAD ALI REZVANI and FAROKHZAD MOHAMADI ZONOZ*

Department of Chemistry, Faculty of Science, University of Guilan, Rasht 419961-3769, Iran

*Department of Chemistry, Hakim Sabzevari University, Sabzevar, 397, Iran

(Received 12 January, revised 28 March 2012)

The oxidative desulphurization of gas oil and model compounds that exist in gas oil with hydrogen peroxide/acetic acid using nanoparticle (Bu4N)7H3[P2W18Cd4(Br)2O68]–TiO2 ((Bu4N)7H3[P2W18Cd4]–TiO2) as a nano scavenger has been studied. This sandwich-type nanoparticle was shown to be able to scavenge hydrogen sulphide and mercaptans in high yields. The addition of acetic acid enhanced the conversion. This system provides an efficient, convenient and practical method for scavenging sulphur compounds. The (Bu4N)7H3[P2W18Cd4]–TiO2 nanoparticle was a very active catalyst system for the oxidation of model compounds, while other polyoxometalate systems were much less active.

Keywords: polyoxometalates; desulphurization; anatase; scavenger; mercaptans.

Full Article - PDF 192 KB Available OnLine: 14. 04. 2012. Cited by

J. Serb. Chem. Soc. 78 (1) 137–154 (2012)

UDC 546.763+539.196+547.992:543.422.3:543.51; JSCS–4403; doi: 10.2298/JSC120320071A; Original scientific paper

A study of chromium interaction with O-donor humic-like ligands using electrospray-ionization mass spectrometry

DARKO H. ANĐELKOVIĆ, RUŽICA S. NIKOLIĆ, DEJAN Z. MARKOVIĆ*, TATJANA D. ANĐELKOVIĆ, GORDANA M. KOCIĆ**, ZORAN B. TODOROVIĆ* and ALEKSANDAR LJ. BOJIĆ

Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia

*Faculty of Technology, University of Niš, Bulevar oslobođenja 124, 16000 Leskovac, Serbia

**Faculty of Medicine, University of Niš, Bulevar dr Zorana Đinđića 81, 18000 Niš, Serbia

(Received 20 March, revised 3 July 2012)

A study of the interaction of chromium with O-donor humic-like ligands war performed using electrospray-ionization mass spectrometry (ESI-MS) and ultraviolet/visible (UV/Vis) spectrophotometry. The heterogeneity of the functional groups justifies the use of model compounds of humic substances. For studying the interaction of chromium with humic substances, benzoic, salicylic, phthalic and citric acid, which include O-donor atoms also present in heterogeneous and polydispersed ligands, such as humic and fulvic acids, were used as model substances. The intensity of the interaction is correlated with the acid–base and electron-donor properties, geometric and steric characteristics, and the number and the positions of the O-donor atoms in the investigated ligands. UV/Vis data describing chromium interaction with humic-like ligands was placed in correlation with ESI-MS data of the complexes, both in quantitative and in qualitative terms. UV/Vis spectroscopy and ESI-MS quantification showed a large difference in the information they yield in describing the interaction of chromium(III) with the ligand, the ESI-MS technique being more informative. ESI-MS Technique can be used for quantitative analysis of the system Cr(III)–ligand. ESI-MS ion current chromatogrAMs of 20 µL loop injections of systems Cr(III)–ligand, indicate a stabile peak and signal integrity.

Keywords: chromium; interaction; humic; ligand; electrospray-ionization mass spectrometry.

Full Article - PDF 320 KB Available OnLine: 11. 07. 2012. Cited by

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