TY - JOUR AU - Balázsi, Áron AU - Bognár, Balázs AU - Jekő, József AU - Kálai, Tamás TI - Synthesis of 3,4-disubstituted pyrroline nitroxides containing diphenylphosphane or diphenylphosphane oxide substituents JF - SYNOPEN J2 - SYNOPEN VL - 8 PY - 2024 IS - 1 SP - 68 EP - 75 PG - 8 SN - 2509-9396 DO - 10.1055/a-2264-8302 UR - https://m2.mtmt.hu/api/publication/34713084 ID - 34713084 N1 - Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Office [NKFI K 137793]; Molecular Scale Bio-physics Research Infrastructure Transnational Access [TNA-MOSBRI-2023-166] Funding text: Financial support from the Hungarian National Research, Development and Innovation Office (NKFI K 137793) and Molecular Scale Bio-physics Research Infrastructure Transnational Access (TNA-MOSBRI-2023-166) are greatly acknowledged LA - English DB - MTMT ER - TY - JOUR AU - Marnautov, N.A. AU - Matveev, M.V. AU - Gulin, A.A. AU - Kálai, Tamás AU - Bognár, Balázs AU - Rebrikova, A.T. AU - Chumakova, N.A. TI - Orientational Ordering of Graphene Oxide Membranes by a Spin Probe Technique and SEM Image Analysis JF - JOURNAL OF PHYSICAL CHEMISTRY C J2 - J PHYS CHEM C VL - 128 PY - 2024 IS - 6 SP - 2543 EP - 2550 PG - 8 SN - 1932-7447 DO - 10.1021/acs.jpcc.3c07127 UR - https://m2.mtmt.hu/api/publication/34657127 ID - 34657127 LA - English DB - MTMT ER - TY - CHAP AU - Bencze, Flórián AU - Bognár, Balázs AU - Kálai, Tamás AU - Kollár, László AU - Nagymihaly, Zoltan AU - Kunsági-Máté, Sándor ED - Hagymási, Krisztina ED - Janda, Tibor ED - Pál, Magda ED - Poór, Péter ED - Szalai, Gabriella TI - Kettős (Spin és Fluoreszcens) Szenzor Molekulák Új Alkalmazása T2 - A Magyar Szabadgyökkutató Társaság XII. Kongresszusa PB - Agrártudományi Kutatóközpont, Mezőgazdasági Intézet CY - Martonvásár SN - 9786156203021 PY - 2023 SP - 13 EP - 13 PG - 1 UR - https://m2.mtmt.hu/api/publication/34131883 ID - 34131883 LA - English DB - MTMT ER - TY - JOUR AU - Bencze, Flórián AU - Bognár, Balázs AU - Kálai, Tamás AU - Kollár, László AU - Nagymihaly, Zoltan AU - Kunsági-Máté, Sándor TI - A New Application of Spin and Fluorescence Double-Sensor Molecules JF - MOLECULES J2 - MOLECULES VL - 28 PY - 2023 IS - 7 PG - 12 SN - 1420-3049 DO - 10.3390/molecules28072978 UR - https://m2.mtmt.hu/api/publication/33722185 ID - 33722185 AB - EPR imaging techniques are known to be successful tools for mapping living bodies, especially because of the high transparency of tissues in the microwave range. This technique assumes the presence of radicals whose in vivo transport is also controlled by serum albumins. Accordingly, in this study, the interactions between 3-hydroxymethyl-1-oxyl-4-(pyren-1-yl)-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole radical and the human serum albumin molecules were investigated. To clarify the adsorption processes of this radical onto the surface of human serum albumin (HSA), the interaction of the OMe derivative of the radical was also examined parallel with the studies on the radical—HSA interactions. Considering the solubility issues and also to modulate the transport, inclusion complexes of the radical with a cavitand derivative were also studied. The latter interactions were observed through fluorescence spectroscopy, fluorescence polarization, and by EPR spectroscopy. As a double-sensor molecule, we found that the fluorophore nitroxide is a good candidate as it gave further information about host-guest interactions (fluorescence, fluorescence polarization, and EPR). We also found that in the presence of a cavitand, a complex with greater stability was formed between the sensor molecule and the human serum albumin. Based on these observations, we can conclude that applying this double-sensor (spin, fluorescent) molecule is useful in cases when different interactions can affect the EPR measurements. LA - English DB - MTMT ER - TY - JOUR AU - Isbera, Mostafa AU - Bognár, Balázs AU - Pápayné Sár, Cecília AU - Jekő, József AU - Kálai, Tamás TI - Kabachnik-Fields reactions with stable nitroxide free radicals JF - ARKIVOC J2 - ARKIVOC VL - 3 PY - 2022 SP - 186 EP - 196 PG - 11 SN - 1551-7012 DO - 10.24820/ark.5550190.p011.849 UR - https://m2.mtmt.hu/api/publication/33127965 ID - 33127965 N1 - Part number: 3 AB - The Kabachnik-Fields reaction is a multicomponent reaction that provides alpha-aminophosphonates and phosphorus analogs of alpha-amino acids. While paramagnetic alpha- amino acids are well known, to the best of our knowledge, this is the first report on paramagnetic.-aminophosphonate syntheses. We present examples of nitroxide-containing.-aminophosphonates starting from five- and six-membered paramagnetic aldehydes, a paramagnetic ketone, and five- and six-membered paramagnetic amines. Starting from a beta-bromo-alpha,beta unsaturated aldehyde, we constructed a pyrroline-nitroxide-condensed heterocycle with a phosphonate ester substituent. [GRAPHICS] LA - English DB - MTMT ER - TY - JOUR AU - Bognár, Balázs AU - Lemli, Beáta AU - Kőrösi, László Tamás AU - Mohamed Ameen, Hiba Farooq AU - Derdák, Diána AU - Isbera, Mostafa AU - Preisz, Zsolt AU - Úr, Györgyi AU - Pápayné Sár, Cecília AU - Kunsági-Máté, Sándor AU - Kálai, Tamás TI - Szemelvények a PTE GyTK Szerves és Gyógyszerkémiai Intézetének újabb (2013-2021) kutatási eredményeiből JF - MAGYAR KÉMIAI FOLYÓIRAT - KÉMIAI KÖZLEMÉNYEK (1997-) J2 - MAGY KÉM FOLY KÉM KÖZL VL - 128 PY - 2022 IS - 2 SP - 68 EP - 78 PG - 11 SN - 1418-9933 DO - 10.24100/MKF.2022.02.68 UR - https://m2.mtmt.hu/api/publication/33090440 ID - 33090440 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kőrösi, László Tamás AU - Bognár, Balázs AU - Czégény, Gyula AU - Lauciello, Simone TI - Phase-Selective Synthesis of Anatase and Rutile TiO2 Nanocrystals and Their Impacts on Grapevine Leaves: Accumulation of Mineral Nutrients and Triggering the Plant Defense JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 12 PY - 2022 IS - 3 PG - 16 SN - 2079-4991 DO - 10.3390/nano12030483 UR - https://m2.mtmt.hu/api/publication/32641372 ID - 32641372 LA - English DB - MTMT ER - TY - JOUR AU - Kálai, Tamás AU - Isbera, Mostafa AU - Bognár, Balázs AU - Pápayné Sár, Cecília AU - Jekő, József AU - Hideg, Kálmán TI - Syntheses and utilizations of pyrroline and tetrahydropyridine nitroxide-based phosphonate esters, a phosphate ester and a bisphosphonate JF - PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS J2 - PHOSPHOR SULFUR SIL REL ELEM VL - 197 PY - 2022 IS - 5-6 SP - 498 EP - 501 PG - 4 SN - 1042-6507 DO - 10.1080/10426507.2021.1989685 UR - https://m2.mtmt.hu/api/publication/32467989 ID - 32467989 N1 - Faculty of Pharmacy, Institute of Organic and Medicinal Chemistry, University of Pécs, Pécs, Hungary Department of Chemistry, University of Nyíregyháza, Nyíregyháza, Hungary Export Date: 6 March 2024 CODEN: PSSLE Correspondence Address: Kálai, T.; Faculty of Pharmacy, Honvéd st. 1, Hungary; email: tamas.kalai@aok.pte.hu AB - Five- and six-membered cyclic nitroxide-based allylic phosphonate esters, alpha-ketophosphonate esters were obtained from the corresponding paramagnetic allyl bromides and acyl chlorides respectively via the Arbuzov reactions. The alpha-hydroxyphosphonate esters were accessed by Pudovik reactions from the corresponding paramagnetic ketones and aldehydes. The beta-ketophosphonate esters were obtained from the appropriate 1-alkynylphosphonate esters via PdCl2-catalyzed hydration. The synthesis of an allylic phosphate ester and a paramagnetic geminal bisphosphonate was also reported. LA - English DB - MTMT ER - TY - JOUR AU - Isbera, Mostafa AU - Bognár, Balázs AU - Gallyas, Ferenc AU - Bényei, Attila Csaba AU - Jekő, József AU - Kálai, Tamás TI - Syntheses and study of a pyrroline nitroxide condensed phospholene oxide and a pyrroline nitroxide with diphenylphosphino moiety JF - PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS J2 - PHOSPHOR SULFUR SIL REL ELEM VL - 197 PY - 2022 IS - 5-6 SP - 515 EP - 517 PG - 3 SN - 1042-6507 DO - 10.1080/10426507.2021.1989690 UR - https://m2.mtmt.hu/api/publication/32466727 ID - 32466727 N1 - Export Date: 6 March 2024 CODEN: PSSLE Correspondence Address: Kálai, T.; Faculty of Pharmacy, Honvéd st. 1, Hungary; email: tamas.kalai@aok.pte.hu AB - The reaction of a diene nitroxide precursor with dichlorophenylphosphine in a McCormac procedure afforded pyrroline nitroxide condensed phospholen oxide. Lithiation of the protected 3-bromo-pyrroline nitroxide followed by treatment with chlorodiphenylphosphine after deprotection afforded (1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)diphenylphosphine oxide, and after reduction, (1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)diphenylphosphine was realized, which was also supported by X-ray single crystal diffraction measurements. This pyrroline diphenylphosphine derivative was converted to hexadecylphosphonium salt, which was more effective antineoplastic agent than its analogue MITO-CP. LA - English DB - MTMT ER - TY - JOUR AU - Benyei, A. AU - Isbera, Mostafa AU - Bognár, Balázs AU - Gallyas, Ferenc AU - Jekő, József AU - Kalai, T. TI - Nitroxide with diphenylphosphino moiety: synthesis, supramolecular structure, biology and catalysis JF - ACTA CRYSTALLOGRAPHICA SECTION A: FOUNDATIONS AND ADVANCES J2 - ACTA CRYSTALLOGR A FOUND ADV VL - 77 PY - 2021 SP - C886 EP - C886 PG - 1 SN - 2053-2733 UR - https://m2.mtmt.hu/api/publication/32766022 ID - 32766022 N1 - Supplement: S LA - English DB - MTMT ER -