TY  - JOUR
AU  - Vučinić-Vasić, M.
AU  - Antić, Bratislav
AU  - Kremenović, Aleksandar
AU  - Nikolić, Aleksandar S.
AU  - Blanusa, J.
AU  - Rakic, S.
AU  - Spasojević, Vojislav
AU  - Kapor, A.
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/820
AB  - Applying a new synthesis route based on the thermal decomposition of a mixture acetylacetonato complexes, Li(AA), La(AA)(3) and Fe(AA)(3), Li, La ferrite (Li0.5La0.08Fe2.42O4) was formed. The element analysis performed by ICP technique and the Rietveld refinement data indicate that the sample is composed of three phases: Li0.5La0.008Fe2.42O4 (69%, SG P4(3)32, a = 8.3445(3) angstrom), La0.14Fe3O4 (16%, SG Fd (3) over barm, a = 8.403(1) angstrom) and LiFeO2 (15%, SG Fm (3) over barm, a = 4.2291(8) angstrom). A partial substitution Fe3+ - gt  La3+ in Li ferrite and La insertion at 16c site in Fe3O4 occur at low concentrations. A partial cation ordering at 4b and 12d octahedral sites in Li0.5La0.08Fe2.42O4 was noticed. TEM micrograph shows that the nanoparticles are spherically shaped and that the particle distribution is in the range between 7 and 33 nm. The sample exhibits superparamagnetic behavior, thus the composite has potential industrial applications. (c) 2006 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Investigation of nanocrystalline phases in Li-La-Fe-O system formed by the decomposition of acetylacetonato complexes
VL  - 428
IS  - 1-2
SP  - 322
EP  - 326
DO  - 10.1016/j.jallcom.2006.03.042
ER  - 

@article{
author = "Vučinić-Vasić, M. and Antić, Bratislav and Kremenović, Aleksandar and Nikolić, Aleksandar S. and Blanusa, J. and Rakic, S. and Spasojević, Vojislav and Kapor, A.",
year = "2007",
abstract = "Applying a new synthesis route based on the thermal decomposition of a mixture acetylacetonato complexes, Li(AA), La(AA)(3) and Fe(AA)(3), Li, La ferrite (Li0.5La0.08Fe2.42O4) was formed. The element analysis performed by ICP technique and the Rietveld refinement data indicate that the sample is composed of three phases: Li0.5La0.008Fe2.42O4 (69%, SG P4(3)32, a = 8.3445(3) angstrom), La0.14Fe3O4 (16%, SG Fd (3) over barm, a = 8.403(1) angstrom) and LiFeO2 (15%, SG Fm (3) over barm, a = 4.2291(8) angstrom). A partial substitution Fe3+ - gt  La3+ in Li ferrite and La insertion at 16c site in Fe3O4 occur at low concentrations. A partial cation ordering at 4b and 12d octahedral sites in Li0.5La0.08Fe2.42O4 was noticed. TEM micrograph shows that the nanoparticles are spherically shaped and that the particle distribution is in the range between 7 and 33 nm. The sample exhibits superparamagnetic behavior, thus the composite has potential industrial applications. (c) 2006 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Investigation of nanocrystalline phases in Li-La-Fe-O system formed by the decomposition of acetylacetonato complexes",
volume = "428",
number = "1-2",
pages = "322-326",
doi = "10.1016/j.jallcom.2006.03.042"
}

Vučinić-Vasić, M., Antić, B., Kremenović, A., Nikolić, A. S., Blanusa, J., Rakic, S., Spasojević, V.,& Kapor, A.. (2007). Investigation of nanocrystalline phases in Li-La-Fe-O system formed by the decomposition of acetylacetonato complexes. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 428(1-2), 322-326.
https://doi.org/10.1016/j.jallcom.2006.03.042

Vučinić-Vasić M, Antić B, Kremenović A, Nikolić AS, Blanusa J, Rakic S, Spasojević V, Kapor A. Investigation of nanocrystalline phases in Li-La-Fe-O system formed by the decomposition of acetylacetonato complexes. in Journal of Alloys and Compounds. 2007;428(1-2):322-326.
doi:10.1016/j.jallcom.2006.03.042 .

Vučinić-Vasić, M., Antić, Bratislav, Kremenović, Aleksandar, Nikolić, Aleksandar S., Blanusa, J., Rakic, S., Spasojević, Vojislav, Kapor, A., "Investigation of nanocrystalline phases in Li-La-Fe-O system formed by the decomposition of acetylacetonato complexes" in Journal of Alloys and Compounds, 428, no. 1-2 (2007):322-326,
https://doi.org/10.1016/j.jallcom.2006.03.042 . .

TY  - JOUR
AU  - Vučinić-Vasić, M.
AU  - Antić, Bratislav
AU  - Blanusa, J
AU  - Rakic, S
AU  - Kremenović, Aleksandar
AU  - Nikolić, Aleksandar S.
AU  - Kapor, A
PY  - 2006
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/743
AB  - Nanosize Li-ferrites were synthesised by the thermal decomposition of an appropriate mixture of complex compounds with acetylacetone - (2,4 pentadione) ligands ([M(AA)(x)]; M = Li and Fe) at 500 degrees C. The obtained sample is composed of three phases determined by the standard Rietveld procedure: Li0.5Fe2.5O4 (S. G. P4(3)32), Li1.16Fe3O4 (S.G. Fd (3) over barm) and LiFeO2 (S.G. Fm (3) over barm). Cation distribution in nanosize ordered spinel Li0.5Fe2.5O4 deviates from that of the bulk counterpart. Microstructure parameters (crystallite size of similar to 23 nm and strain of 3.2526(9) x 10(3)) were determined by the Rietveld refinement of the TCH-pV parameters. SEM microphotographs show a particle size of similar to 50-60 nm. An order disorder phase transition in ordered spinel Li0.5Fe2.5O4 was studied by DSC measurements and in situ XRPD technique. The temperature of phase transition was found to be 762 degrees C ( DSC) and (745 +/- 5) degrees C ( XRPD).
PB  - Springer, New York
T2  - Applied Physics. A: Materials Science and Processing
T1  - Formation of nanosize Li-ferrites from acetylacetonato complexes and their crystal structure, microstructure and order-disorder phase transition
VL  - 82
IS  - 1
SP  - 49
EP  - 54
DO  - 10.1007/s00339-005-3378-y
ER  - 

@article{
author = "Vučinić-Vasić, M. and Antić, Bratislav and Blanusa, J and Rakic, S and Kremenović, Aleksandar and Nikolić, Aleksandar S. and Kapor, A",
year = "2006",
abstract = "Nanosize Li-ferrites were synthesised by the thermal decomposition of an appropriate mixture of complex compounds with acetylacetone - (2,4 pentadione) ligands ([M(AA)(x)]; M = Li and Fe) at 500 degrees C. The obtained sample is composed of three phases determined by the standard Rietveld procedure: Li0.5Fe2.5O4 (S. G. P4(3)32), Li1.16Fe3O4 (S.G. Fd (3) over barm) and LiFeO2 (S.G. Fm (3) over barm). Cation distribution in nanosize ordered spinel Li0.5Fe2.5O4 deviates from that of the bulk counterpart. Microstructure parameters (crystallite size of similar to 23 nm and strain of 3.2526(9) x 10(3)) were determined by the Rietveld refinement of the TCH-pV parameters. SEM microphotographs show a particle size of similar to 50-60 nm. An order disorder phase transition in ordered spinel Li0.5Fe2.5O4 was studied by DSC measurements and in situ XRPD technique. The temperature of phase transition was found to be 762 degrees C ( DSC) and (745 +/- 5) degrees C ( XRPD).",
publisher = "Springer, New York",
journal = "Applied Physics. A: Materials Science and Processing",
title = "Formation of nanosize Li-ferrites from acetylacetonato complexes and their crystal structure, microstructure and order-disorder phase transition",
volume = "82",
number = "1",
pages = "49-54",
doi = "10.1007/s00339-005-3378-y"
}

Vučinić-Vasić, M., Antić, B., Blanusa, J., Rakic, S., Kremenović, A., Nikolić, A. S.,& Kapor, A.. (2006). Formation of nanosize Li-ferrites from acetylacetonato complexes and their crystal structure, microstructure and order-disorder phase transition. in Applied Physics. A: Materials Science and Processing
Springer, New York., 82(1), 49-54.
https://doi.org/10.1007/s00339-005-3378-y

Vučinić-Vasić M, Antić B, Blanusa J, Rakic S, Kremenović A, Nikolić AS, Kapor A. Formation of nanosize Li-ferrites from acetylacetonato complexes and their crystal structure, microstructure and order-disorder phase transition. in Applied Physics. A: Materials Science and Processing. 2006;82(1):49-54.
doi:10.1007/s00339-005-3378-y .

Vučinić-Vasić, M., Antić, Bratislav, Blanusa, J, Rakic, S, Kremenović, Aleksandar, Nikolić, Aleksandar S., Kapor, A, "Formation of nanosize Li-ferrites from acetylacetonato complexes and their crystal structure, microstructure and order-disorder phase transition" in Applied Physics. A: Materials Science and Processing, 82, no. 1 (2006):49-54,
https://doi.org/10.1007/s00339-005-3378-y . .

TY  - JOUR
AU  - Kapor, A
AU  - Ribar, B
AU  - Strumpel, M
AU  - Gasic, MJ
AU  - Milić, Dragana
AU  - Šolaja, Bogdan A.
PY  - 2000
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/387
AB  - Colourless single crystals were isolated as by-product during the synthesis of steroidal A-ring substituted 1,4-quinones (and epoxyquinols), as synthetic products with antibiotic and antitumor properties. Its structure was proposed by comparing IR, UV, H-1 and C-13 NMR spectra to the ones of quinone 2 and independently determined by an X-ray analysis, as 2 beta,3 beta-epoxyestr-5(10)-en-1,4,17-trione. Crystals belong to the monoclinic system with space group P2(1): a = 6.767(3) Angstrom, b = 7.097(5) Angstrom, 15.748(5) Angstrom, beta = 97.070(5)degrees, V = 750.6(8) Angstrom(3), Z = 2, D-x = 1.329 Mg m(-3), mu(Mo K-alpha) = 0.093 mm(-1). The structure was solved by direct methods and refined to a final R = 0.064 for 1729 reflections with I  gt  2 sigma(I). The steroidal skeleton with chiral centre at C13 possesses the S configuration defining beta-orientation of O2 atom bridging C2 and C3 atoms and beta-oriented methyl group bonded to C13 atom. The best plane through the ring A and epoxy ring plane form an angle of 89.6(2)degrees. Conformational analysis of the steroid rings are performed by calculating the ring puckering parameters and asymmetry factors. The conformation of the A ring is screw-boat S-1(6), ring B half-chair H-4(3), ring C chair C-1(4), and the five-membered D ring is half-chair H-2(1) conformation. The crystal structure is stabilised by the weak C-H ... O hydrogen bonds and van der Waals interaction. (C) 2000 Elsevier Science B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Molecular Structure
T1  - Structure and conformation of 2 beta,3 beta-epoxyestr-5(10)-en-1,4, 17-trione, spectroscopic and X-ray crystallographic studies
VL  - 522
SP  - 289
EP  - 301
DO  - 10.1016/S0022-2860(99)00363-4
ER  - 

@article{
author = "Kapor, A and Ribar, B and Strumpel, M and Gasic, MJ and Milić, Dragana and Šolaja, Bogdan A.",
year = "2000",
abstract = "Colourless single crystals were isolated as by-product during the synthesis of steroidal A-ring substituted 1,4-quinones (and epoxyquinols), as synthetic products with antibiotic and antitumor properties. Its structure was proposed by comparing IR, UV, H-1 and C-13 NMR spectra to the ones of quinone 2 and independently determined by an X-ray analysis, as 2 beta,3 beta-epoxyestr-5(10)-en-1,4,17-trione. Crystals belong to the monoclinic system with space group P2(1): a = 6.767(3) Angstrom, b = 7.097(5) Angstrom, 15.748(5) Angstrom, beta = 97.070(5)degrees, V = 750.6(8) Angstrom(3), Z = 2, D-x = 1.329 Mg m(-3), mu(Mo K-alpha) = 0.093 mm(-1). The structure was solved by direct methods and refined to a final R = 0.064 for 1729 reflections with I  gt  2 sigma(I). The steroidal skeleton with chiral centre at C13 possesses the S configuration defining beta-orientation of O2 atom bridging C2 and C3 atoms and beta-oriented methyl group bonded to C13 atom. The best plane through the ring A and epoxy ring plane form an angle of 89.6(2)degrees. Conformational analysis of the steroid rings are performed by calculating the ring puckering parameters and asymmetry factors. The conformation of the A ring is screw-boat S-1(6), ring B half-chair H-4(3), ring C chair C-1(4), and the five-membered D ring is half-chair H-2(1) conformation. The crystal structure is stabilised by the weak C-H ... O hydrogen bonds and van der Waals interaction. (C) 2000 Elsevier Science B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Molecular Structure",
title = "Structure and conformation of 2 beta,3 beta-epoxyestr-5(10)-en-1,4, 17-trione, spectroscopic and X-ray crystallographic studies",
volume = "522",
pages = "289-301",
doi = "10.1016/S0022-2860(99)00363-4"
}

Kapor, A., Ribar, B., Strumpel, M., Gasic, M., Milić, D.,& Šolaja, B. A.. (2000). Structure and conformation of 2 beta,3 beta-epoxyestr-5(10)-en-1,4, 17-trione, spectroscopic and X-ray crystallographic studies. in Journal of Molecular Structure
Elsevier Science Bv, Amsterdam., 522, 289-301.
https://doi.org/10.1016/S0022-2860(99)00363-4

Kapor A, Ribar B, Strumpel M, Gasic M, Milić D, Šolaja BA. Structure and conformation of 2 beta,3 beta-epoxyestr-5(10)-en-1,4, 17-trione, spectroscopic and X-ray crystallographic studies. in Journal of Molecular Structure. 2000;522:289-301.
doi:10.1016/S0022-2860(99)00363-4 .

Kapor, A, Ribar, B, Strumpel, M, Gasic, MJ, Milić, Dragana, Šolaja, Bogdan A., "Structure and conformation of 2 beta,3 beta-epoxyestr-5(10)-en-1,4, 17-trione, spectroscopic and X-ray crystallographic studies" in Journal of Molecular Structure, 522 (2000):289-301,
https://doi.org/10.1016/S0022-2860(99)00363-4 . .

TY  - JOUR
AU  - Milić, Dragana
AU  - Kapor, A
AU  - Markov, B
AU  - Ribar, B
AU  - Strumpel, M
AU  - Juranić, Z.
AU  - Gasic, MJ
AU  - Šolaja, Bogdan A.
PY  - 1999
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/426
AB  - Based on the biological properties of epoxyquinols from natural sources, the title compound was synthesised as a potential antitumor agent. Its molecular structure was partially confirmed by NMR studies. The detailed structure was established by X-ray analysis revealing two symmetry independent molecules in the asymmetric unit each consisting of four fused rings with the C(10) beta-oriented hydroxy group and beta-oriented O atom bridging C(4) and C(5). The conformation of A ring in both conformers A and B is boat (B-3,B-6), while rings B and C are chairs (C-1(4)) and the five-membered D ring is in an envelope (E-2) conformation. The in vitro antitumor activity of title compound and its 17 beta-acetoxy analogue against HeLa and Fem-x cells revealed IC50 values of 5.7 and 7.1 mu M, and 2.25 and 1.58 mu M, respectively. Corresponding quinols were tested on 47 cell lines with 10 beta-hydroxy-17 beta-acetoxyestra-1,4-dien-3-one being most active against leukemia SR cells (GI(50) = 0.17 mu M).
PB  - Mdpi Ag, Basel
T2  - Molecules
T1  - X-ray crystal structure of 10 beta-hydroxy-4 beta,5 beta P-epoxyestr-1-en-3,17-dione and antitumor activity of its congeners
VL  - 4
IS  - 12
SP  - 338
EP  - 352
DO  - 10.3390/41200338
ER  - 

@article{
author = "Milić, Dragana and Kapor, A and Markov, B and Ribar, B and Strumpel, M and Juranić, Z. and Gasic, MJ and Šolaja, Bogdan A.",
year = "1999",
abstract = "Based on the biological properties of epoxyquinols from natural sources, the title compound was synthesised as a potential antitumor agent. Its molecular structure was partially confirmed by NMR studies. The detailed structure was established by X-ray analysis revealing two symmetry independent molecules in the asymmetric unit each consisting of four fused rings with the C(10) beta-oriented hydroxy group and beta-oriented O atom bridging C(4) and C(5). The conformation of A ring in both conformers A and B is boat (B-3,B-6), while rings B and C are chairs (C-1(4)) and the five-membered D ring is in an envelope (E-2) conformation. The in vitro antitumor activity of title compound and its 17 beta-acetoxy analogue against HeLa and Fem-x cells revealed IC50 values of 5.7 and 7.1 mu M, and 2.25 and 1.58 mu M, respectively. Corresponding quinols were tested on 47 cell lines with 10 beta-hydroxy-17 beta-acetoxyestra-1,4-dien-3-one being most active against leukemia SR cells (GI(50) = 0.17 mu M).",
publisher = "Mdpi Ag, Basel",
journal = "Molecules",
title = "X-ray crystal structure of 10 beta-hydroxy-4 beta,5 beta P-epoxyestr-1-en-3,17-dione and antitumor activity of its congeners",
volume = "4",
number = "12",
pages = "338-352",
doi = "10.3390/41200338"
}

Milić, D., Kapor, A., Markov, B., Ribar, B., Strumpel, M., Juranić, Z., Gasic, M.,& Šolaja, B. A.. (1999). X-ray crystal structure of 10 beta-hydroxy-4 beta,5 beta P-epoxyestr-1-en-3,17-dione and antitumor activity of its congeners. in Molecules
Mdpi Ag, Basel., 4(12), 338-352.
https://doi.org/10.3390/41200338

Milić D, Kapor A, Markov B, Ribar B, Strumpel M, Juranić Z, Gasic M, Šolaja BA. X-ray crystal structure of 10 beta-hydroxy-4 beta,5 beta P-epoxyestr-1-en-3,17-dione and antitumor activity of its congeners. in Molecules. 1999;4(12):338-352.
doi:10.3390/41200338 .

Milić, Dragana, Kapor, A, Markov, B, Ribar, B, Strumpel, M, Juranić, Z., Gasic, MJ, Šolaja, Bogdan A., "X-ray crystal structure of 10 beta-hydroxy-4 beta,5 beta P-epoxyestr-1-en-3,17-dione and antitumor activity of its congeners" in Molecules, 4, no. 12 (1999):338-352,
https://doi.org/10.3390/41200338 . .

TY  - JOUR
AU  - Milić, Dragana
AU  - Šolaja, Bogdan A.
AU  - Došen-Mićović, Ljiljana
AU  - Ribár, B.
AU  - Kapor, A.
AU  - Sladić, Dušan
AU  - Gašić, M.J.
PY  - 1997
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/47
AB  - The preparation of substituted steroidal A-ring 1,4-quinones by nucleophilic addition results in pronounced regioselectivity at C(2), as confirmed by the X-ray analysis of 2-methoxy-2,5(10)-diene-1,4,17-trione. Conformational analysis (PM3, AM1, MNDO) of the suggested protonated intermediates and the difference in the relative energies of the transition states are considered. The results of cytotoxicity tests of selected quinones are also presented.
T2  - Journal of the Serbian Chemical Society
T1  - Structure and reactivity of steroidal quinones
VL  - 62
IS  - 9
SP  - 755
EP  - 768
UR  - https://hdl.handle.net/21.15107/rcub_cherry_47
ER  - 

@article{
author = "Milić, Dragana and Šolaja, Bogdan A. and Došen-Mićović, Ljiljana and Ribár, B. and Kapor, A. and Sladić, Dušan and Gašić, M.J.",
year = "1997",
abstract = "The preparation of substituted steroidal A-ring 1,4-quinones by nucleophilic addition results in pronounced regioselectivity at C(2), as confirmed by the X-ray analysis of 2-methoxy-2,5(10)-diene-1,4,17-trione. Conformational analysis (PM3, AM1, MNDO) of the suggested protonated intermediates and the difference in the relative energies of the transition states are considered. The results of cytotoxicity tests of selected quinones are also presented.",
journal = "Journal of the Serbian Chemical Society",
title = "Structure and reactivity of steroidal quinones",
volume = "62",
number = "9",
pages = "755-768",
url = "https://hdl.handle.net/21.15107/rcub_cherry_47"
}

Milić, D., Šolaja, B. A., Došen-Mićović, L., Ribár, B., Kapor, A., Sladić, D.,& Gašić, M.J.. (1997). Structure and reactivity of steroidal quinones. in Journal of the Serbian Chemical Society, 62(9), 755-768.
https://hdl.handle.net/21.15107/rcub_cherry_47

Milić D, Šolaja BA, Došen-Mićović L, Ribár B, Kapor A, Sladić D, Gašić M. Structure and reactivity of steroidal quinones. in Journal of the Serbian Chemical Society. 1997;62(9):755-768.
https://hdl.handle.net/21.15107/rcub_cherry_47 .

Milić, Dragana, Šolaja, Bogdan A., Došen-Mićović, Ljiljana, Ribár, B., Kapor, A., Sladić, Dušan, Gašić, M.J., "Structure and reactivity of steroidal quinones" in Journal of the Serbian Chemical Society, 62, no. 9 (1997):755-768,
https://hdl.handle.net/21.15107/rcub_cherry_47 .