@article{MTMT:34753165,
	title = {Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis},
	url = {https://m2.mtmt.hu/api/publication/34753165},
	author = {Béres, Kende Attila and Dürvanger, Zsolt and Homonnay, Zoltán and Nagyné Bereczki, Laura and Barta Holló, Berta and Farkas, Attila and Petruševski, Vladimir M. and Kótai, László},
	doi = {10.3390/inorganics12040094},
	journal-iso = {INORGANICS},
	journal = {INORGANICS},
	volume = {12},
	unique-id = {34753165},
	abstract = {[Carbonatotetraamminecobalt(III)] permanganate monohydrate was synthesized first in the metathesis reaction of [Co(NH3)4CO3]NO3 and NaMnO4 in aqueous solution. Its thermal dehydration at 100 °C resulted in phase-pure [Co(NH3)4CO3]MnO4 (compound 1). Compounds 1 and 2 (i.e., the hydrated form) were studied with IR, far-IR, and low-temperature Raman spectroscopies, and their vibrational modes were assigned. The lattice parameters were determined by powder X-ray diffraction (PXRD) and single crystal X-ray diffraction (SXRD) methods for the triclinic and orthorhombic compounds 1 and 2, respectively. The detailed structure of compound 2 was determined, and the role of hydrogen bonds in the structural motifs was clarified. UV studies on compounds 1 and 2 showed the distortion of the octahedral geometry of the complex cation during dehydration because of the partial loss of the hydrogen bonds between the crystal water and the ligands of the complex cation. The thermal decomposition consists of a solid phase quasi-intramolecular redox reaction between the ammonia ligands and permanganate anions with the formation of ammonia oxidation products (H2O, NO, N2O, and CO2). The solid phase reaction product is amorphous cobalt manganese oxide containing ammonium, carbonate (and nitrate) anions. The temperature-controlled thermal decomposition of compound 2 in toluene at 110 °C showed that one of the decomposition intermediates is ammonium nitrate. The decomposition intermediates are transformed into Co1.5Mn1.5O4 spinel with MnCo2O4 structure upon further heating. Solid compound 2 gave the spinel at 500 °C both in an inert and air atmosphere, whereas the sample pre-treated in toluene at 110 °C without and with the removal of ammonium nitrate by aqueous washing, gave the spinel already at 300 and 400 °C, respectively. The molten NH4NO3 is a medium to start spinel crystallization, but its decomposition stops further crystal growth of the spinel phase. By this procedure, the particle size of the spinel product as low as ~4.0 nm could be achieved for the treatments at 300 and 400 °C, and it increased only to 5.7 nm at 500 °C. The nano-sized mixed cobalt manganese oxides are potential candidates as Fischer-Tropsch catalysts.},
	year = {2024},
	eissn = {2304-6740},
	pages = {94},
	orcid-numbers = {Béres, Kende Attila/0000-0003-4257-0581; Dürvanger, Zsolt/0000-0002-2652-4916; Homonnay, Zoltán/0000-0001-5299-5394; Barta Holló, Berta/0000-0002-5786-442X; Farkas, Attila/0000-0002-8877-2587}
}

@article{MTMT:34718662,
	title = {Hexakis(urea-O)iron Complex Salts as a Versatile Material Family: Overview of Their Properties and Applications},
	url = {https://m2.mtmt.hu/api/publication/34718662},
	author = {Béres, Kende Attila and Homonnay, Zoltán and Kótai, László},
	doi = {10.1021/acsomega.3c09635},
	journal-iso = {ACS OMEGA},
	journal = {ACS OMEGA},
	volume = {9},
	unique-id = {34718662},
	issn = {2470-1343},
	year = {2024},
	eissn = {2470-1343},
	pages = {11148-11167},
	orcid-numbers = {Béres, Kende Attila/0000-0003-4257-0581; Homonnay, Zoltán/0000-0001-5299-5394}
}

@article{MTMT:34160976,
	title = {ANALYSIS OF THE IRON STATES IN IRON-CONTAINING PHARMACEUTICAL PRODUCTS USING MÖSSBAUER SPECTROSCOPY},
	url = {https://m2.mtmt.hu/api/publication/34160976},
	author = {Alenkina, Irina V. and Chukin, Andrey V. and Leitus, Gregory and Denisova, Olga V. and Gracheva, Maria and Felner, Israel and Kuzmann, Ernő and Homonnay, Zoltán and Oshtrakh, Michael I.},
	doi = {10.1016/j.jpba.2023.115745},
	journal-iso = {J PHARMACEUT BIOMED ANAL},
	journal = {JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS},
	volume = {237},
	unique-id = {34160976},
	issn = {0731-7085},
	year = {2024},
	eissn = {1873-264X},
	orcid-numbers = {Gracheva, Maria/0000-0001-5245-8425; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394; Oshtrakh, Michael I./0000-0002-2937-5194}
}

@CONFERENCE{MTMT:34572950,
	title = {Különféle ligandumokat és anionokat tartalmazó ezüst(I)- és kobalt(III)-komplexsók szintézise, szerkezete és tulajdonsága},
	url = {https://m2.mtmt.hu/api/publication/34572950},
	author = {Béres, Kende Attila},
	booktitle = {Intézményi ÚNKP konferencia},
	unique-id = {34572950},
	year = {2023},
	pages = {120},
	orcid-numbers = {Béres, Kende Attila/0000-0003-4257-0581}
}

@article{MTMT:34323900,
	title = {Comparison of two pharmaceutical products containing ferrous sulfate using Mössbauer spectroscopy},
	url = {https://m2.mtmt.hu/api/publication/34323900},
	author = {Oshtrakh, Michael I. and Alenkina, Irina V. and Chukin, Andrey V. and Kuzmann, Ernő and Homonnay, Zoltán},
	doi = {10.1007/s10751-023-01835-4},
	journal-iso = {HYPERFINE INTERACT},
	journal = {HYPERFINE INTERACTIONS},
	volume = {244},
	unique-id = {34323900},
	issn = {0304-3843},
	year = {2023},
	eissn = {1572-9540},
	orcid-numbers = {Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394}
}

@article{MTMT:34316828,
	title = {Spectroscopic and structural characterization of hexaamminecobalt(III) dibromide permanganate},
	url = {https://m2.mtmt.hu/api/publication/34316828},
	author = {Barta Holló, Berta and Bayat, Niloofar and Nagyné Bereczki, Laura and Petrusevski, Vladimir and Béres, Kende Attila and Farkas, Attila and Szilágyi, Imre Miklós and Kótai, László},
	doi = {10.2298/JSC230702062B},
	journal-iso = {J SERB CHEM SOC},
	journal = {JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
	volume = {88},
	unique-id = {34316828},
	issn = {0352-5139},
	abstract = {Structural and spectroscopic characterization (SXRD, IR, liq. N2 temperature Raman, UV) of hexaamminecobalt(III) dibromide permanganate, [Co(NH3)6]Br2(MnO4) (compound 1) are described. There is a 3D hydrogen bond network including N-H???O-Mn and N-H???Br interactions, which could serve as potential reaction centers for solid-phase redox reactions between the ammonia ligands and/or bromide ions as reductants and permanganate ions as oxidant agents. The effect of the nature of halogen ions on the structural and spectroscopic properties of [Co(NH3)6]Br2(MnO4) and the analogous chloride compound, [Co(NH3)6]Cl2(MnO4) (compound 2) are discussed in detail.},
	year = {2023},
	eissn = {1820-7421},
	pages = {1237-1252},
	orcid-numbers = {Barta Holló, Berta/0000-0002-5786-442X; Béres, Kende Attila/0000-0003-4257-0581; Farkas, Attila/0000-0002-8877-2587}
}

@article{MTMT:34266835,
	title = {Analysis of the differential nonlinearity for the velocity driving systems in Mössbauer spectrometers using thin α-Fe reference absorber},
	url = {https://m2.mtmt.hu/api/publication/34266835},
	author = {Oshtrakh, Michael I. and Kuzmann, Ernő and Homonnay, Zoltán and Semionkin, Vladimir A.},
	doi = {10.1007/s10751-023-01831-8},
	journal-iso = {HYPERFINE INTERACT},
	journal = {HYPERFINE INTERACTIONS},
	volume = {244},
	unique-id = {34266835},
	issn = {0304-3843},
	year = {2023},
	eissn = {1572-9540},
	orcid-numbers = {Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394}
}

@article{MTMT:34189382,
	title = {A possible novel method in nuclear forensics: positron annihilation spectroscopy},
	url = {https://m2.mtmt.hu/api/publication/34189382},
	author = {Tóbi, Csaba and Homonnay, Zoltán and Süvegh, Károly},
	doi = {10.1007/s10967-023-08926-0},
	journal-iso = {J RADIOANAL NUCL CH LE (1984-1996)},
	journal = {JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY- LETTERS},
	volume = {332},
	unique-id = {34189382},
	issn = {0236-5731},
	year = {2023},
	pages = {2741-2747},
	orcid-numbers = {Homonnay, Zoltán/0000-0001-5299-5394; Süvegh, Károly/0000-0001-8147-0546}
}

@article{MTMT:34181984,
	title = {Characterization of iron meteorites by scanning electron microscopy, x-ray diffraction, magnetization measurements, and Mossbauer spectroscopy: Mundrabilla IAB-ung},
	url = {https://m2.mtmt.hu/api/publication/34181984},
	author = {Goryunov, M. V. and Varga, G. and Dankházi, Zoltán and Chukin, A. V. and Felner, I. and Kuzmann, Ernő and Grokhovsky, V. I. and Homonnay, Zoltán and Oshtrakh, M. I.},
	doi = {10.1111/maps.14070},
	journal-iso = {METEORIT PLANET SCI},
	journal = {METEORITICS & PLANETARY SCIENCE},
	volume = {58},
	unique-id = {34181984},
	issn = {1086-9379},
	abstract = {A fragment of Mundrabilla IAB-ung iron meteorite was analyzed using optical microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), magnetization measurements, and Mossbauer spectroscopy. The polished section of meteorite fragment characterization by optical microscopy and SEM shows the presence of the gamma-Fe(Ni, Co) phase lamellae, plessite structures and schreibersite inclusions in the alpha-Fe(Ni, Co) phase. EDS indicates variations in the Ni concentrations in the following ranges: (i) similar to 6.3-6.5 atom% in the alpha-Fe(Ni, Co) phase and (ii) similar to 22 to similar to 45 atom% in the gamma-Fe(Ni, Co) phase lamellae including the range of similar to 29-33 atom% of Ni leading to the paramagnetic state of the gamma-Fe(Ni, Co) phase. Schreibersite inclusions contain similar to 23 atom% of P, similar to 33 atom% of Fe, similar to 43 atom% of Ni, and similar to 0.7 atom% of Co. Plessite structure contains the average Ni concentration of similar to 17 atom% while detailed EDS analysis shows: (i) the lowest Ni concentrations of similar to 5 to similar to 8 atom%, (ii) the intermediate Ni concentrations of similar to 9 to similar to 19 atom%, and (iii) the highest Ni concentration up similar to 38 atom% (some individual micro-grains demonstrate up to similar to 47 and similar to 59 atom% of Ni) that may indicate the presence of the (i) alpha-Fe(Ni, Co), (ii) alpha(2)-Fe(Ni, Co), and (iii) gamma-Fe(Ni, Co) phases. These may be a result of the c-phase decomposition with mechanism gamma -> alpha + alpha(2) + gamma that indicates a slow cooling rate for Mundrabilla IAB-ung iron meteorite. The presence of similar to 98.6 wt% of the alpha-Fe(Ni, Co) phase and similar to 1.4 wt% of the gamma-Fe(Ni, Co) phase is found by XRD while schreibersite is not detected. Magnetization measurements show the saturation magnetization moment of Mundrabilla IAB-ung of 188(2) emu g(-1) indicating a low average Ni concentration in Fe-Ni-Co alloy. Mossbauer spectrum of the bulk Mundrabilla powder demonstrates five magnetic sextets related to the ferromagnetic alpha(2)-Fe(Ni, Co), alpha-Fe(Ni, Co), and gamma-Fe(Ni, Co) phases and one singlet associated with the paramagnetic gamma-Fe(Ni, Co) phase, however, there are no spectral components corresponding to schreibersite. Basing on relatively larger and smaller values of the magnetic hyperfine field, two magnetic sextets associated with gamma-Fe(Ni, Co) phase can be related to the disordered and more ordered gamma-phases. The iron fractions in the detected phases can be roughly estimated as follows: (i) similar to 17.6% in the alpha(2)-Fe(Ni, Co) phase, (ii) similar to 68.5% in the alpha-Fe(Ni, Co) phase, (iii) similar to 11.5% in the disordered gamma-Fe(Ni, Co) phase, (iv) similar to 2.0% in the more ordered gamma-Fe(Ni, Co) phase, and (v) similar to 0.4% in the paramagnetic gamma-Fe(Ni, Co) phase.},
	year = {2023},
	eissn = {1945-5100},
	pages = {1552-1562},
	orcid-numbers = {Dankházi, Zoltán/0000-0001-9545-2015; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394}
}

@article{MTMT:34107401,
	title = {Fe spin states and redox processes in Schiff base type complexes},
	url = {https://m2.mtmt.hu/api/publication/34107401},
	author = {Várhelyi, Csaba, ifj. and Szőke, Á. and Sziráki, Laura and Tomoaia-Cotișel, M. and Homonnay, Zoltán and Szalay, Roland and Simon-Várhelyi, M. and Mereu, R.-A. and Pokol, György and Szilágyi, Imre Miklós and Papp, J. and Mihály, Judith and Kuzmann, Ernő},
	doi = {10.1007/s10967-023-09095-w},
	journal-iso = {J RADIOANAL NUCL CHEM},
	journal = {JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY},
	volume = {332},
	unique-id = {34107401},
	issn = {0236-5731},
	year = {2023},
	eissn = {1588-2780},
	pages = {4125-4139},
	orcid-numbers = {Homonnay, Zoltán/0000-0001-5299-5394; Szalay, Roland/0000-0003-3535-5365; Pokol, György/0000-0003-1597-9808; Kuzmann, Ernő/0000-0002-0183-6649}
}