Vol 80, No 2 - Abstracts

JSCS Vol 80, No 2

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Whole issue - PDF 3,176 kB

J. Serb. Chem. Soc. 80 (2) 127–136 (2015)

UDC 547.979.733+547.233+547.962.9+547.21.024+547.497+542.97:615.27; JSCS–4703; doi: 10.2298/JSC140319092Z; Original scientific paper

Novel hybrids of oxoisoaporphine–tryptAMine as inhibitors of acetylcholinesterase-induced β-AMyloid aggregation with improved antioxidant properties

HAI-TAO ZHAO, SHU-MING ZHONG, JIANG-KE QIN and HUANG TANG

Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China

(Received 18 March, revised 3 September, accepted 10 September 2014)

A series of dual binding site acetylcholinesterase (AChE) inhibitors was designed, synthesized, and tested for their antioxidant ability and inhibitory potency on AChE and AChE-induced β-AMyloid (Aβ) aggregation. The new hybrids consisted of a unit of 1-azabenzanthrone and tryptAMine or its derivative, connected through an α,ω-alka(e)nediAMide bridge. These hybrids exhibited moderate AChE inhibitory activity with IC50 values in the micromolar range and significant in vitro inhibitory activity towards AChE-induced Aβ aggregation. Moreover, six of the nine hybrids of this series exhibited a higher oxygen radical absorbance capacity than trolox, which makes them promising anti-Alzheimer drug candidates.

Keywords: Alzheimer’s disease; acetylcholinesterase inhibitor; Aβ anti-aggregating activity; oxoisoaporphine–tryptAMine.

Full Article - PDF 348 kB Supplementary Material PDF 330 kB Available OnLine: 10. 09. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 137–142 (2015)

UDC *Astragalus depressus:577.121:547.918:543.422.25:543.51; JSCS–4704; doi: 10.2298/JSC140526094M; Short communication

SHORT COMMUNICATION

An isoflavane and saponins from Astragalus depressus L.

LEYLA MAAMRIA, HAMADA HABA, CATHERINE LAVAUD*, DOMINIQUE HARAKAT* and MOHAMMED BENKHALED

Laboratoire de Chimie et Chimie de l’Environnement (L.C.C.E), Département de Chimie, Faculté des Sciences, Université de Batna, Batna 05000, Algeria

*Laboratoire de pharmacognosie, Institut de Chimie Moléculaire de Reims, CNRS UMR 6229, BP 1039, 51097 Reims Cedex 2, France

(Received 26 May, revised 14 September, accepted 16 September 2014)

In this study, nine known secondary metabolites were isolated from ethyl acetate and n-butanol extracts of Astragalus depressus L. (Fabaceae fAMily), including one isoflavane, nAMely pendulone (1) and eight saponins, nAMely cyclogaleginoside A (2), astrasieversianin II (3), astrasieversianin IV (4), astrasieversianin VIII (5), astrasieversianin VI (6), astrasieversianin XIV (7), dehydrosoyasaponin I (8) and soyasaponin I (9). The structures of compounds 1–9 were elucidated by spectroscopic methods, including 1D and 2D NMR, ESI mass spectrometry and comparison with literature data.

Keywords: Fabaceae; Astragalus depressus; saponins; pendulone; NMR; ESI.

Full Article - PDF 255 kB Supplementary Material PDF 330 kB Available OnLine: 16. 09. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 143–157 (2015)

UDC 615.27+615.35:616.12–089; JSCS–4705; doi: 10.2298/JSC140617088P; Original scientific paper

Markers of inflAMmation and antioxidant enzyme activities in restenosis following percutaneous coronary intervention

SNEŽANA PANTOVIĆ*, DRAGICA BOŽOVIĆ**, GORAN NIKOLIĆ*,***, MILICA MARTINOVIĆ*, PREDRAG MITROVIĆ****,*****, LENKA RADULOVIĆ*, ALEKSANDRA ISAKOVIĆ****** and IVANKA MARKOVIĆ******

*Faculty of Medicine, University of Montenegro, Kruševac bb, Podgorica, Montenegro

**Center for Clinical Laboratory Diagnostic, Clinical Centar of Montenegro, Podgorica, Montenegro

***Center for Radiology Diagnostics, Clinical Center of Montenegro, Ljubljanska bb, Podgorica, Montenegro

****Cardiology Clinic, Clinical Center of Serbia, Belgrade, Serbia

*****Faculty of Medicine, University of Belgrade, Belgrade, Serbia

******Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Pasterova 2, 11000 Belgrade, Serbia

(Received 17 June, revised 30 August, accepted 2 September 2014)

The efficacy of percutaneous coronary intervention (PCI) is often compromised by the need for repeat revascularization because of restenosis development. Numerous studies have tried to establish the predictive value of different biochemical markers of restenosis, with conflicting results. The aim of this study was to assess the prognostic significance of inflAMmatory and lipid markers, and major antioxidant enzyme activity for the development of in-stent restenosis (ISR) following PCI. Serum high sensitive C-reactive protein (hs-CRP), soluble intercellular cell adhesion molecule-1 (sICAM-1), transforming growth factor-beta (TGF-β), lipoprotein(a) (LP(a)) and oxidized low-density lipoprotein (oxLDL) levels, as well as serum extracellular superoxide dismutase (EC-SOD) and catalase (CAT) activities were determined in 44 patients before the stent implantation procedure, and after 6-month follow-up. The results after follow-up revealed that in patients that developed angiographically confirmed ISR, the increase in serum hs-CRP levels was significantly higher compared to those without stenosis. Stent implantation induced compensatory increases in the activities of serum antioxidant enzymes at follow-up, with significantly lower CAT activity in patients with ISR, possibly contributing to stenosis development. No significant changes in the circulating levels of ICAM-1, TGF-β, oxLDL and Lp(a) were observed between the groups. In conclusion, serum hs-CRP level and CAT activity may be considered as useful biochemical markers for monitoring patients during follow-up after stent implantation.

Keywords: coronary restenosis; hs-CRP; EC-SOD; catalase; oxLDL; Lp(a).

Full Article - PDF 366 kB Available OnLine: 03. 09. 2013. Cited by

J. Serb. Chem. Soc. 80 (2) 159–169 (2015)

UDC 547.474.6+618.36:532.74:576; JSCS–4706; doi: 10.2298/JSC140428091C; Original scientific paper

Molecular forms of galectin-1 from human placenta and trophoblast cells

DANICA ĆUJIĆ, ŽANKA BOJIĆ-TRBOJEVIĆ, NIKOLA KOLUNDŽIĆ, TOSHIHIKO KADOYA* and LJILJANA VIĆOVAC

Institute for the Application of Nuclear Energy – INEP, University of Belgrade, Banatska 31b, 11080 Belgrade, Serbia

*Department of Biotechnology, Maebashi Institute of Technology, Maebashi, Gunma, Japan

(Received 28 April, revised 3 September 2014, accepted 9 September 2014)

Galectin-1 (gal-1) is the best-studied member of the galectin fAMily of the human placenta, which is assumed to play important roles in pregnancy. Standard isolation of gal-1 from human placenta using lactose extraction and affinity chromatography in the presence of a reducing agent produced several known forms of gal-1, which were compared to the recombinant human gal-1 (rhgal-1) and oxidized recombinant human gal-1 (Ox-gal-1). The isolated placental gal-1 retained lectin-binding activity, evidenced by hemagglutination and dot blot lectin assays. Characterization of the forms present by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI–TOF MS), based on hydrophilic interactions or immunorecognition, provided a sensitive tool for the detection of the fine differences AMong the diverse molecular forms. The forms detected included previously established biologically active oxidized gal-1 and reduced gal-1, as well as some other currently uncharacterized (less investigated forms).

Keywords: galectin-1; placenta; molecular form; SELDI-TOF MS.

Full Article - PDF 857 kB Available OnLine: 10. 09. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 171–178 (2015)

UDC *Alpinia blepharocalyx:665.52/.54+54547.599.6:632.951:615.9; JSCS–4707; doi: 10.2298/JSC140422068W; Original scientific paper

Chemical constituents and insecticidal activities of the essential oil from Alpinia blepharocalyx rhizomes against Lasioderma serricorne

YING WANG, CHUN XUE YOU, KAI YANG, RAN CHEN, WEN JUAN ZHANG, YAN WU*, ZHI LONG LIU**, SHU SHAN DU and ZHI WEI DENG***

Beijing Key Laboratory of Traditional Chinese Medicine Protection and Utilization, Beijing Normal University, Beijing 100875, China and State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijng 100700, China

*Technical Center of China Tobacco Guangxi Industrial Co., Ltd., Nanning 530001, China

**Department of Entomology, China Agricultural University, Beijing 100193, China

***Analytical and Testing Center, Beijing Normal University, Beijing 100875, China

(Received 22 April, revised 24 June, accepted 3 July 2014)

The aim of this research was to determine the chemical constituents and toxicities of the essential oil derived from Alpinia blepharocalyx rhizomes against the cigarette beetle, Lasioderma serricorne (Fabricius). The essential oil of A. blepharocalyx rhizomes was obtained by hydrodistillation and was investigated by gas chromatography–mass spectrometry (GC–MS). A total of 46 components of the essential oil of A. blepharocalyx rhizomes were identified. The principal compounds in A. blepharocalyx essential oil were cAMphor (23.13 %), sabinene (11.27 %), α-pinene (9.81 %) and eucalyptol (8.86 %) followed by cAMphene (8.05 %), sylvestrene (5.61 %) and α-phellandrene (5.00 %). Among them, the four active constituents, predicted with a bioactivity-test, were isolated and identified as cAMphor, sabinene, α-pinene and eucalyptol. The essential oil of A. blepharocalyx possessed strong contact toxicity against the cigarette beetle with ad LD50 value of 15.02 μg adult-1, and exhibited strong fumigant toxicity against L. serricorne adults with an LC50 value of 3.83 mg L-1 air. The results indicate that the essential oil of A. blepharocalyx shows potential in terms of contact and fumigant toxicities against stored product insects.

Keywords: cigarette beetle; camphor; eucalyptol; contact toxicity; fumigant toxicity.

Full Article - PDF 305 kB Supplementary Material PDF 311 kB Available OnLine: 03. 07. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 179–186 (2015)

UDC 546.732:66.061+547.565.2:543.4/.5; JSCS–4708, doi: 10.2298/JSC140514102V; Original scientific paper

Liquid–liquid extraction of ion-association complexes of cobalt(II)–4-(2-pyridylazo)resorcinol with ditetrazolium salts

VIDKA V. DIVAROVA, KIRILA T. STOJNOVA, PETYA V. RACHEVA*, VANYA D. LEKOVA and ATANAS N. DIMITROV

Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Plovdiv “Paisii Hilendarski”, 24 Tsar Assen Street, 4000 Plovdiv, Bulgaria

*Department of Chemistry and Biochemistry, Faculty of Pharmacology, Medical University Plovdiv,
15A Vasil Aprilov Boulevard, 4002 Plovdiv, Bulgaria

(Received 14 May, revised 8 October, accepted 20 October 2014)

The formation and liquid–liquid extraction of ion-association complexes between Co(II)–4-(2-pyridylazo)resorcinol (Co(II)–PAR) anionic chelates and cations of three ditetrazolium chlorides (DTC), i.e., blue tetrazolium chloride (BTC), neotetrazolium chloride (NTC) and nitro blue tetrazolium chloride (NBTC), were studied. The optimum conditions for the formation and solvent extraction of the ion-association complex chelates were determined. It has been found that in the Co(II)–PAR–DTC systems, the reactants are present in the mole ratio 1:2:1 and the general formula of complexes was suggested. The extraction equilibria were investigated and quantitatively characterized by the equilibrium constants and the recovery factors. The analytical characteristics of the complexes were calculated.

Keywords: spectrophotometry; solvent extraction; chelates; extraction equilibria.

Full Article - PDF 429 kB Available OnLine: 20. 10. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 187–196 (2015)

UDC 519.233.5:539.16:66.097.8:547.75; JSCS–4709; doi:10.2298/JSC140523064A; Original scientific paper

Application of genetic algorithm – multiple linear regressions to predict the activity of RSK inhibitors

ZHILA MOHAJERI AVVAL, ESLAM POURBASHEER, MOHAMMAD REZA GANJALI* and PARVIZ NOROUZI*^,**

Department of Chemistry, PayAMe Noor University, Tehran, Iran

*Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran

**Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran

(Received 25 May, accepted 19 June 2014)

This paper considers the development of a linear quantitative structure–activity relationship (QSAR) model for predicting the ribosomal S6 kinase (RSK) inhibition activity of some new compounds. A dataset consisting of 59 pyrazino[1,2-α]indole, diazepino[1,2-α]indole, and imidazole derivatives with known inhibitory activities was used. The multiple linear regressions (MLR) technique combined with stepwise (SW) and the genetic algorithm (GA) methods as variable selection tools was employed. For more checking of the stability, robustness and predictability of the proposed models, internal and external validation techniques were used. Comparison of the obtained results, indicate that the GA-MLR model is superior to the SW–MLR model and that it is applicable for designing novel RSK inhibitors.

Keywords: QSAR; genetic algorithms; multiple linear regression; RSK inhibitors.

Full Article - PDF 375 kB Supplementary Material PDF 312 kB Available OnLine: 19. 06. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 197–207 (2015)

UDC 546.73–72+544.654.2:621.397.3+621385.833:537.621; JSCS–4710; doi: 10.2298/JSC200814104M; Original scientific paper

Correlation between morphology and magnetic properties of electrochemically produced cobalt powder particles

VESNA M. MAKSIMOVIĆ, NEBOJŠA D. NIKOLIĆ**, VLADAN B. KUSIGERSKI and JOVAN L. BLANUŠA

Institute of Nuclear Sciences, “Vinča”, University of Belgrade, P. O. Box 522, 11001 Belgrade, Serbia

*ICTM – Institute of Electrochemistry, University of Belgrade, Njegoševa 12, P. O. Box 473, 11001 Belgrade, Serbia

(Received 20 August, revised 8 October 2014, accepted 24 October 2014)

Cobalt 3D powder particles were successfully prepared by galvanostatic electrodeposition. The electrodeposited cobalt powders were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and SQUID magnetometry. It was shown that the morphology, structure and magnetic properties of cobalt particles were closely associated and could be easily controlled by adjusting the electrodeposition process parAMeters. The morphology of cobalt powder particles was strongly affected by the hydrogen evolution reaction as a parallel reaction to cobalt electrodeposition. Depending on the applied current density, two types of powder particles were formed: dendrites at lower and spongy-like particles at higher current densities. Morphologies and structures of powder particles were correlated with their magnetic properties, and compared with those of the bulk cobalt. In comparison with the properties of bulk cobalt, the obtained 3D structures exhibited a decreased saturation magnetization (MS), but an enhanced coercivity (HC), which was explained by their peculiar morphology.

Keywords: electrodeposition; cobalt; powder; scanning electron microscope; X-ray diffraction analysis; magnetic properties.

Full Article - PDF 2,089 kB Available OnLine: 24. 10. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 209–222 (2015)

UDC 547.498.004.12:615.32:543.2; JSCS–4711; doi: 10.2298/JSC030814114K; Original scientific paper

Characterization of the optimal formulation by DSC, TGA, FT-IR and PXRD analysis

MARKO KRSTIĆ, SLAVICA RAŽIĆ*, DRAGANA VASILJEVIĆ, ĐURĐIJA SPASOJEVIĆ and SVETLANA IBRIĆ

Department of Pharmaceutical Technology and Cosmetology, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, P. O. Box 146, 11221 Belgrade, Serbia

*Department of Analytical Chemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, P. O. Box 146, 11221 Belgrade, Serbia

(Received 3 August, revised 14 November, accepted 15 November 2014)

Poor solubility is one of the key reasons for the poor bioavailability of carbAMazepine drugs. This study considers formulation of solid surfactant systems with carbAMazepine, in order to increase its dissolution rate. Solid-state surfactant systems were formed by application of fractional experimental design. PoloxAMer 237 and PoloxAMer 338 were used as the surfactants and Brij® 35 was used as the co-surfactant. The ratios of the excipients and carbAMazepine were varied and their effects on the dissolution rate of carbAMazepine were exAMined. Moreover, the effects of the addition of natural (diatomite) and a synthetic adsorbent carrier (NeusilinÒ UFL2) on the dissolution rate of carbAMazepine were also tested. The prepared surfactant systems were characterized and the influences of the excipients on possible changes of the polymorphous form of carbAMazepine exAMined by application of analytical techniques (DSC, TGA, FT-IR and PXRD). It was determined that an appropriate selection of the excipient type and ratio could provide a significant increase in the carbAMazepine dissolution rate. By application of analytical techniques, it was found that the employed excipients induce a transition of carbAMazepine into the AMorphous form and that the selected sAMple was stable for three months, when kept under AMbient conditions.

Keywords: poloxAMer; neusilin; diatomite; solid surfactant drug delivery systems; polymorphous transition.

Full Article - PDF 687 kB Supplementary Material PDF 386 kB Available OnLine: 14. 11. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 223–235 (2015)

UDC 677.52:678.742:541.124.2:548.3; JSCS–4712; doi: 10.2298/JSC140324055J; Original scientific paper

The influence of glass fibers on the morphology of b-nucleated isotactic polypropylene evaluated by differential scanning calorimetry

ACO JANEVSKI and GORDANA BOGOEVA-GACEVA*

1Faculty for Technology, “Goce Delcev” University, 2000 Stip, FYR Macedonia

*Faculty of Technology and Metallurgy, St. Cyril and Methodius University, 1000 Skopje, FYR Macedonia

(Received 23 March, revised 26 May 2014, accepted 27 May 2014)

The presence of fillers/fibers can significantly affect the polymorphic behavior of semi-crystalline polymers. The influence of glass fibers on morphology of β-nucleated isotactic polypropylene (iPP) during isothermal and nonisothermal crystallization was analyzed in detail by differential scanning calorimetry (DSC), and the kinetics and thermodynAMic parAMeters were determined for the systems containing 10–60 % glass fibers. The presence of glass fibers in the model composites with β-iPP had an insignificant effect on the morphology of the polymer. ThermodynAMic and kinetics parAMeters of crystallization of iPP in model composites were similar to those obtained for the nucleated polymer. The relative content of β-crystalline phase was slightly affected by increasing glass the fiber content from 10 to 60 mas. % due to appearance of α-crystallites. Moreover, the stability of the β-crystalline phase was decreased with increasing glass fiber content and there appeared a certain AMount of β1 and β2 phases, which are known to be disposed to recrystallization.

Key words: crystallization; composites; DSC; polypropylene; β-nucleated.

Full Article - PDF 652 kB Supplementary Material PDF 328 kB Available OnLine: 26. 05. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 237–251 (2015)

UDC 546.41’185+544.27+544.654.2:621.793:539.217; JSCS–4713; doi: 10.2298/JSC140626098D; Original scientific paper

The porosity and roughness of electrodeposited calcium phosphate coatings in simulated body fluid

MARIJA S. DJOŠIĆ, MIODRAG MITRIĆ* and VESNA B. MIŠKOVIĆ-STANKOVIĆ**

Institute for Technology of Nuclear and Other Mineral Raw Materials, Franše d’Epere 86, 11000 Belgrade, Serbia

*Institute of Nuclear Sciences “Vinča”, University of Belgrade, P. O. Box 522, 11001 Belgrade, Serbia

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

(Received 26 June, revised 1 October, accepted 2 October 2014)

Abstract: Calcium phosphate coatings were electrochemically deposited on titanium from an aqueous solution of Ca(NO3)2 and NH4H2PO4 at a current density of 10 mA cm-2 for a deposition time of 15 min. The obtained brushite coatings (CaHPO4·2H2O), were converted to hydroxyapatite (HA) by soaking in simulated body fluid (SBF) for 2, 7 and 14 days. The brushite and hydroxyapatite coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). It was shown that increasing the soaking time increased the porosity, roughness and crystallite domain size of the HA coatings and decreased the unit cell parAMeters and unit cell volume, while the mean pore area of HA was unaffected. The calcium and phosphorus ions concentrations in SBF were determined by atomic absorption spectroscopy (AAS) and UV–Vis spectroscopy, respectively, and a mechanism of HA growth based on dissolution–precipitation was proposed.

Keywords: hydroxyapatite; brushite; coatings; nanostructures; titanium.

Full Article - PDF 1,892 kB Available OnLine: 02. 10. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 253–264 (2015)

UDC 66.011+577.354:541.121; JSCS–4714; doi: 10.2298/JSC131124052A; Original scientific paper

Evaluation of optimization methods for solving the receptor model for chemical mass balance

N. ANU, S. RANGABHASHIYAM, ANTONY RAHUL and N. SELVARAJU

Department of Chemical Engineering, National Institute of Technology Calicut Kozhikode-673601, Kerala, India

(Received 14 November 2013, revised 31 March 2014, accepted 18 May 2014)

The chemical mass balance (CMB 8.2) model has been extensively used in order to determine source contribution for particulate matters (size diAMeters less than 10 and 2.5 µm) in air quality analysis. A comparison of the source contribution estimated from three CMB models was realized through optimization techniques, such as ‘fmincon’ (CMB–fmincon) and genetic algorithm (CMB–GA) using MATLAB. The proposed approach was validated using a San Joaquin Valley Air Quality Study (SJVAQS) California Fresno and Bakersfield PM10 and PM2.5 followed with Oregon PM10 data. The source contribution estimated from CMB–GA was better in source interpretation in comparison with CMB8.2 and CMB–fmincon. The performance accuracies of three CMB approaches were validated using R2, reduced χ2 and percentage mass tests. The R2 (0.90, 0.67 and 0.81, 0.83), χ2 (0.36, 0.66 and 0.65, 0.43) and percentage mass (67.36, 55.03 and 94.24 %, 74.85 %) of CMB–GA showed high correlation for PM10, PM2.5, Fresno and Bakersfield data, respectively. To make a complete decision, the proposed methodology was bench marked with Portland, Oregon PM10 data with the best fit with R2 (0.99), χ2 (1.6) and percentage mass (94.4 %) from CMB–GA. Therefore, the study revealed that CMB with genetic algorithm optimization method exhibiting better stability in determining the source contributions.

Keywords: receptor model; chemical mass balance; source contribution; source profiles; genetic algorithm.

Full Article - PDF 504 kB Supplementary Material PDF 2,361 kB Available OnLine: 18. 05. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 265–275 (2015)

UDC 54–44+544.275–128+541.183:546.264–31; JSCS–4715; doi: 10.2298/JSC220214103Y; Original scientific paper

Molecular sieve-supported ionic liquids as efficient adsorbents for CO₂ capture

NA YANG AND RUI WANG*

School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China, E-mail: yangna13579@tom.com

*School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China

(Received 22 February, revised 29 September 2014, accepted 23 October 2014)

Amino ethyl-3-methylimidazolium tetrafluoroborate, [NH3e-mim] [BF4], AMino ethyl-3-methylimidazolium tetrafluoroborate, [OHe-mim][BF4], and 2-hydroxyethylAMmonium lactate, [HOEAm], were selected and supported onto a variety of molecular sieves, NaY, USY, SAPO-34 and MCM-41, to prepare supported ionic liquids. It was found that [NH3e-mim][BF4]/NaY showed an excellent CO2 adsorption performance, with an adsorption capacity of 0.11 mmol CO2 g-1. In this study, the optimal adsorption conditions and recyclability of [NH3e-mim][BF4]/NaY were investigated. The results showed that [NH3e-mim][BF4]/NaY showed good CO2 adsorption under the conditions of 20 °C and 20 % loading of the IL. By vacuum heating, the CO2 adsorption capacity reached 0.45 mmol CO2 g-1 in the fifth adsorption run but was reduced to 0.29 mmol CO2 g in the tenth run. The structure and characterization of [NH3e-mim][BF4]/NaY were exAMined by FT-IR, XRD, SEM and TG–DSC. The TG–DSC results showed that the thermostability of NH3e-mim][BF4]/NaY was good below 50 °C.

Keywords: ionic liquid; molecular sieve; CO2; adsorption capacity.

Full Article - PDF 488 kB Supplementary Material PDF 296 kB Available OnLine: 23. 10. 2014. Cited by

J. Serb. Chem. Soc. 80 (2) 277 (2015)

ERRATUM

Issue No. 9 (2014), Vol. 79, paper No. JSCS-4656, pp. 1185–1198:

Supplementary material Section should read:

SUPPLEMENTARY MATERIAL

Experimental details, total concentrations of the elements in soil and the sum of the available fractions are available electronically from http://www.shd.org.rs/JSCS/, or from the corresponding author on request.

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